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Essay on Water Pollution

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Essay on Water Pollution in 150-250 words

Essay on water pollution in 300-400 words, essay on water pollution in 500-1000 words.

Water pollution is a pressing environmental issue that poses a significant threat to ecosystems and human health. It occurs when harmful substances, such as chemicals, industrial waste, or sewage, contaminate water bodies, including rivers, lakes, oceans, and groundwater sources.

Water pollution has devastating consequences on aquatic life. Toxic pollutants can disrupt the balance of ecosystems, leading to the decline of fish and other marine species. Additionally, contaminated water can spread diseases to animals and humans who depend on these water sources for drinking, irrigation, and recreation.

Industrial activities, improper waste disposal, agricultural runoff, and urbanization contribute to water pollution. Efforts to reduce water pollution include stricter regulations on waste disposal, the promotion of sustainable agricultural practices, and the development of advanced wastewater treatment technologies.

Awareness and individual responsibility are crucial in combating water pollution. Simple actions like properly disposing of waste, conserving water, and avoiding the use of harmful chemicals can make a significant difference. Education and advocacy are essential to raising public awareness about the importance of protecting water resources and implementing sustainable practices.

In conclusion, water pollution is a grave environmental issue that threatens aquatic ecosystems and human well-being. It is a global challenge that requires collective action and responsible behavior. By implementing effective regulations, adopting sustainable practices, and promoting awareness, we can safeguard our water resources and ensure a healthier and more sustainable future for all.

Title: Water Pollution – A Growing Threat to Ecosystems and Human Well-being

Introduction :

Water pollution is a grave environmental issue that arises from the contamination of water bodies by harmful substances. It poses a significant threat to aquatic ecosystems and human health. This essay explores the causes and consequences of water pollution, as well as the measures required to address and prevent it.

Causes of Water Pollution

Water pollution can be attributed to various human activities and natural factors. Industrial discharge, improper waste disposal, agricultural runoff, oil spills, sewage, and chemical pollutants are among the leading causes. Rapid urbanization, population growth, and inadequate infrastructure for waste management contribute to the problem. Additionally, natural phenomena like sedimentation and erosion can exacerbate water pollution.

Consequences of Water Pollution

Water pollution has far-reaching ecological and human health implications. Contaminated water disrupts aquatic ecosystems, leading to the decline of fish and other marine species. It affects biodiversity, disrupts food chains, and damages habitats. Moreover, polluted water sources pose significant health risks to humans. Consuming or coming into contact with contaminated water can lead to waterborne diseases, gastrointestinal issues, skin problems, and even long-term health impacts.

Prevention and Remediation

Addressing water pollution requires a multi-faceted approach. Stricter regulations and enforcement regarding industrial discharge and waste management are essential. Promoting sustainable agricultural practices, such as reducing the use of chemical fertilizers and implementing proper irrigation techniques, can minimize agricultural runoff. Developing and implementing advanced wastewater treatment technologies is crucial to ensure that domestic and industrial effluents are properly treated before being discharged into water bodies.

Individual and Collective Responsibility:

Preventing water pollution is a shared responsibility. Individuals can contribute by practicing responsible waste disposal, conserving water, and avoiding the use of harmful chemicals. Public awareness campaigns and education programs play a vital role in promoting responsible behavior and fostering a culture of environmental stewardship.

Conclusion :

Water pollution is a critical environmental issue that jeopardizes the health of ecosystems and humans. It demands collective action and responsible behavior. By addressing the root causes of water pollution, implementing effective regulations, and promoting individual and collective responsibility, we can safeguard water resources and ensure a sustainable future for generations to come.

Title: Water Pollution – A Looming Crisis Threatening Ecosystems and Human Well-being

Water pollution is a pressing environmental issue that poses a significant threat to ecosystems, biodiversity, and human health. It occurs when harmful substances contaminate water bodies, making them unfit for their intended uses. This essay delves into the causes, consequences, and potential solutions to water pollution, emphasizing the urgent need for collective action to address this global crisis.

Water pollution arises from various sources, both human-induced and natural. Human activities play a significant role in polluting water bodies. Industrial discharge, untreated sewage, agricultural runoff, oil spills, mining activities, and improper waste disposal are among the leading causes. Industrial wastewater often contains heavy metals, toxic chemicals, and organic pollutants, which can have devastating effects on aquatic ecosystems and human health. Agricultural runoff, laden with pesticides, fertilizers, and animal waste, contaminates water bodies and contributes to eutrophication, depleting oxygen levels and harming aquatic life.

The consequences of water pollution are far-reaching and encompass ecological, economic, and health impacts. Aquatic ecosystems bear the brunt of pollution, with devastating consequences for biodiversity and food chains. Pollutants disrupt aquatic habitats, decrease water quality, and lead to the decline of fish and other marine species. This ecological imbalance has ripple effects throughout the ecosystem, affecting the entire food web.

Water pollution also has severe implications for human health. Contaminated water sources pose significant risks, as they can transmit waterborne diseases, including cholera, typhoid, dysentery, and hepatitis. Communities that rely on polluted water for drinking, cooking, and bathing are particularly vulnerable. Prolonged exposure to polluted water can lead to various health issues, such as gastrointestinal problems, skin irritations, respiratory illnesses, and even long-term health effects like cancer.

Furthermore, water pollution has economic ramifications. Polluted water bodies reduce the availability of clean water for agriculture, industry, and domestic use. This leads to increased costs for water treatment, agricultural productivity losses, and economic disruptions in sectors that rely heavily on water resources, such as fisheries and tourism.

Solutions and Mitigation Strategies

Addressing water pollution requires comprehensive strategies and collaborative efforts. Governments, industries, communities, and individuals all have a role to play in mitigating pollution and safeguarding water resources.

a. Regulatory Measures

B. wastewater treatment, c. sustainable agriculture, d. waste management, e. education and awareness.

Effective regulations and enforcement mechanisms are essential to control and prevent water pollution. Governments should establish stringent standards for industrial effluents and enforce penalties for non-compliance. Laws should be enacted to ensure proper waste disposal and treatment practices. Additionally, zoning regulations can help prevent pollution by restricting industrial activities near sensitive water bodies.

Investing in advanced wastewater treatment infrastructure is crucial. Industries should implement appropriate treatment technologies to remove pollutants from their effluents before discharge. Municipalities must prioritize the treatment of domestic sewage to prevent contamination of water bodies. Developing countries, in particular, need support and resources to build and upgrade their wastewater treatment facilities.

Adopting sustainable agricultural practices can significantly reduce pollution from agricultural activities. Encouraging the use of organic farming methods, integrated pest management, and precision irrigation can minimize the reliance on harmful pesticides and fertilizers. Proper manure management and implementing buffer zones along water bodies can also mitigate nutrient runoff and protect water quality.

Improper waste disposal is a major contributor to water pollution. Implementing comprehensive waste management systems that include recycling, proper landfill management, and promotion of waste reduction strategies is crucial. Communities should have access to adequate waste collection services, and educational campaigns can raise awareness about the importance of responsible waste disposal.

Public education and awareness programs play a vital role in addressing water pollution. Promoting water conservation practices, encouraging responsible behavior, and highlighting the link between water pollution and human health can empower individuals to take action. Educational campaigns should target schools, communities, and industries to foster a culture of environmental stewardship.

Water pollution is a critical global issue that poses severe threats to ecosystems, biodiversity, and human well-being. It demands collective action and sustainable practices to safeguard water resources. Through stringent regulations, advanced wastewater treatment, sustainable agriculture, proper waste management, and education, we can mitigate water pollution and preserve this vital resource for future generations. By recognizing the urgency of this crisis and working collaboratively, we can ensure a healthier, cleaner, and more sustainable water future.

Water Pollution: Everything You Need to Know

Our rivers, reservoirs, lakes, and seas are drowning in chemicals, waste, plastic, and other pollutants. Here’s why―and what you can do to help.

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What is water pollution?

What are the causes of water pollution, categories of water pollution, what are the effects of water pollution, what can you do to prevent water pollution.

Water pollution occurs when harmful substances—often chemicals or microorganisms—contaminate a stream, river, lake, ocean, aquifer, or other body of water, degrading water quality and rendering it toxic to humans or the environment.

This widespread problem of water pollution is jeopardizing our health. Unsafe water kills more people each year than war and all other forms of violence combined. Meanwhile, our drinkable water sources are finite: Less than 1 percent of the earth’s freshwater is actually accessible to us. Without action, the challenges will only increase by 2050, when global demand for freshwater is expected to be one-third greater than it is now.

Water is uniquely vulnerable to pollution. Known as a “universal solvent,” water is able to dissolve more substances than any other liquid on earth. It’s the reason we have Kool-Aid and brilliant blue waterfalls. It’s also why water is so easily polluted. Toxic substances from farms, towns, and factories readily dissolve into and mix with it, causing water pollution.

Here are some of the major sources of water pollution worldwide:

Agricultural

Toxic green algae in Copco Reservoir, northern California

Aurora Photos/Alamy

Not only is the agricultural sector the biggest consumer of global freshwater resources, with farming and livestock production using about 70 percent of the earth’s surface water supplies , but it’s also a serious water polluter. Around the world, agriculture is the leading cause of water degradation. In the United States, agricultural pollution is the top source of contamination in rivers and streams, the second-biggest source in wetlands, and the third main source in lakes. It’s also a major contributor of contamination to estuaries and groundwater. Every time it rains, fertilizers, pesticides, and animal waste from farms and livestock operations wash nutrients and pathogens—such bacteria and viruses—into our waterways. Nutrient pollution , caused by excess nitrogen and phosphorus in water or air, is the number-one threat to water quality worldwide and can cause algal blooms , a toxic soup of blue-green algae that can be harmful to people and wildlife.

Sewage and wastewater

Used water is wastewater. It comes from our sinks, showers, and toilets (think sewage) and from commercial, industrial, and agricultural activities (think metals, solvents, and toxic sludge). The term also includes stormwater runoff , which occurs when rainfall carries road salts, oil, grease, chemicals, and debris from impermeable surfaces into our waterways

More than 80 percent of the world’s wastewater flows back into the environment without being treated or reused, according to the United Nations; in some least-developed countries, the figure tops 95 percent. In the United States, wastewater treatment facilities process about 34 billion gallons of wastewater per day . These facilities reduce the amount of pollutants such as pathogens, phosphorus, and nitrogen in sewage, as well as heavy metals and toxic chemicals in industrial waste, before discharging the treated waters back into waterways. That’s when all goes well. But according to EPA estimates, our nation’s aging and easily overwhelmed sewage treatment systems also release more than 850 billion gallons of untreated wastewater each year.

Oil pollution

Big spills may dominate headlines, but consumers account for the vast majority of oil pollution in our seas, including oil and gasoline that drips from millions of cars and trucks every day. Moreover, nearly half of the estimated 1 million tons of oil that makes its way into marine environments each year comes not from tanker spills but from land-based sources such as factories, farms, and cities. At sea, tanker spills account for about 10 percent of the oil in waters around the world, while regular operations of the shipping industry—through both legal and illegal discharges—contribute about one-third. Oil is also naturally released from under the ocean floor through fractures known as seeps.

Radioactive substances

Radioactive waste is any pollution that emits radiation beyond what is naturally released by the environment. It’s generated by uranium mining, nuclear power plants, and the production and testing of military weapons, as well as by universities and hospitals that use radioactive materials for research and medicine. Radioactive waste can persist in the environment for thousands of years, making disposal a major challenge. Consider the decommissioned Hanford nuclear weapons production site in Washington, where the cleanup of 56 million gallons of radioactive waste is expected to cost more than $100 billion and last through 2060. Accidentally released or improperly disposed of contaminants threaten groundwater, surface water, and marine resources.

To address pollution and protect water we need to understand where the pollution is coming from (point source or nonpoint source) and the type of water body its impacting (groundwater, surface water, or ocean water).

Where is the pollution coming from?

Point source pollution.

When contamination originates from a single source, it’s called point source pollution. Examples include wastewater (also called effluent) discharged legally or illegally by a manufacturer, oil refinery, or wastewater treatment facility, as well as contamination from leaking septic systems, chemical and oil spills, and illegal dumping. The EPA regulates point source pollution by establishing limits on what can be discharged by a facility directly into a body of water. While point source pollution originates from a specific place, it can affect miles of waterways and ocean.

Nonpoint source

Nonpoint source pollution is contamination derived from diffuse sources. These may include agricultural or stormwater runoff or debris blown into waterways from land. Nonpoint source pollution is the leading cause of water pollution in U.S. waters, but it’s difficult to regulate, since there’s no single, identifiable culprit.

Transboundary

It goes without saying that water pollution can’t be contained by a line on a map. Transboundary pollution is the result of contaminated water from one country spilling into the waters of another. Contamination can result from a disaster—like an oil spill—or the slow, downriver creep of industrial, agricultural, or municipal discharge.

What type of water is being impacted?

Groundwater pollution.

When rain falls and seeps deep into the earth, filling the cracks, crevices, and porous spaces of an aquifer (basically an underground storehouse of water), it becomes groundwater—one of our least visible but most important natural resources. Nearly 40 percent of Americans rely on groundwater, pumped to the earth’s surface, for drinking water. For some folks in rural areas, it’s their only freshwater source. Groundwater gets polluted when contaminants—from pesticides and fertilizers to waste leached from landfills and septic systems—make their way into an aquifer, rendering it unsafe for human use. Ridding groundwater of contaminants can be difficult to impossible, as well as costly. Once polluted, an aquifer may be unusable for decades, or even thousands of years. Groundwater can also spread contamination far from the original polluting source as it seeps into streams, lakes, and oceans.

Surface water pollution

Covering about 70 percent of the earth, surface water is what fills our oceans, lakes, rivers, and all those other blue bits on the world map. Surface water from freshwater sources (that is, from sources other than the ocean) accounts for more than 60 percent of the water delivered to American homes. But a significant pool of that water is in peril. According to the most recent surveys on national water quality from the U.S. Environmental Protection Agency, nearly half of our rivers and streams and more than one-third of our lakes are polluted and unfit for swimming, fishing, and drinking. Nutrient pollution, which includes nitrates and phosphates, is the leading type of contamination in these freshwater sources. While plants and animals need these nutrients to grow, they have become a major pollutant due to farm waste and fertilizer runoff. Municipal and industrial waste discharges contribute their fair share of toxins as well. There’s also all the random junk that industry and individuals dump directly into waterways.

Ocean water pollution

Eighty percent of ocean pollution (also called marine pollution) originates on land—whether along the coast or far inland. Contaminants such as chemicals, nutrients, and heavy metals are carried from farms, factories, and cities by streams and rivers into our bays and estuaries; from there they travel out to sea. Meanwhile, marine debris— particularly plastic —is blown in by the wind or washed in via storm drains and sewers. Our seas are also sometimes spoiled by oil spills and leaks—big and small—and are consistently soaking up carbon pollution from the air. The ocean absorbs as much as a quarter of man-made carbon emissions .

On human health

To put it bluntly: Water pollution kills. In fact, it caused 1.8 million deaths in 2015, according to a study published in The Lancet . Contaminated water can also make you ill. Every year, unsafe water sickens about 1 billion people. And low-income communities are disproportionately at risk because their homes are often closest to the most polluting industries.

Waterborne pathogens, in the form of disease-causing bacteria and viruses from human and animal waste, are a major cause of illness from contaminated drinking water . Diseases spread by unsafe water include cholera, giardia, and typhoid. Even in wealthy nations, accidental or illegal releases from sewage treatment facilities, as well as runoff from farms and urban areas, contribute harmful pathogens to waterways. Thousands of people across the United States are sickened every year by Legionnaires’ disease (a severe form of pneumonia contracted from water sources like cooling towers and piped water), with cases cropping up from California’s Disneyland to Manhattan’s Upper East Side.

A woman using bottled water to wash her three-week-old son at their home in Flint, Michigan

Todd McInturf/The Detroit News/AP

Meanwhile, the plight of residents in Flint, Michigan —where cost-cutting measures and aging water infrastructure created a lead contamination crisis—offers a stark look at how dangerous chemical and other industrial pollutants in our water can be. The problem goes far beyond Flint and involves much more than lead, as a wide range of chemical pollutants—from heavy metals such as arsenic and mercury to pesticides and nitrate fertilizers —are getting into our water supplies. Once they’re ingested, these toxins can cause a host of health issues, from cancer to hormone disruption to altered brain function. Children and pregnant women are particularly at risk.

Even swimming can pose a risk. Every year, 3.5 million Americans contract health issues such as skin rashes, pinkeye, respiratory infections, and hepatitis from sewage-laden coastal waters, according to EPA estimates.

On the environment

In order to thrive, healthy ecosystems rely on a complex web of animals, plants, bacteria, and fungi—all of which interact, directly or indirectly, with each other. Harm to any of these organisms can create a chain effect, imperiling entire aquatic environments.

When water pollution causes an algal bloom in a lake or marine environment, the proliferation of newly introduced nutrients stimulates plant and algae growth, which in turn reduces oxygen levels in the water. This dearth of oxygen, known as eutrophication , suffocates plants and animals and can create “dead zones,” where waters are essentially devoid of life. In certain cases, these harmful algal blooms can also produce neurotoxins that affect wildlife, from whales to sea turtles.

Chemicals and heavy metals from industrial and municipal wastewater contaminate waterways as well. These contaminants are toxic to aquatic life—most often reducing an organism’s life span and ability to reproduce—and make their way up the food chain as predator eats prey. That’s how tuna and other big fish accumulate high quantities of toxins, such as mercury.

Marine ecosystems are also threatened by marine debris , which can strangle, suffocate, and starve animals. Much of this solid debris, such as plastic bags and soda cans, gets swept into sewers and storm drains and eventually out to sea, turning our oceans into trash soup and sometimes consolidating to form floating garbage patches. Discarded fishing gear and other types of debris are responsible for harming more than 200 different species of marine life.

Meanwhile, ocean acidification is making it tougher for shellfish and coral to survive. Though they absorb about a quarter of the carbon pollution created each year by burning fossil fuels, oceans are becoming more acidic. This process makes it harder for shellfish and other species to build shells and may impact the nervous systems of sharks, clownfish, and other marine life.

With your actions

We’re all accountable to some degree for today’s water pollution problem. Fortunately, there are some simple ways you can prevent water contamination or at least limit your contribution to it:

• Learn about the unique qualities of water where you live . Where does your water come from? Is the wastewater from your home treated? Where does stormwater flow to? Is your area in a drought? Start building a picture of the situation so you can discover where your actions will have the most impact—and see if your neighbors would be interested in joining in!
• Reduce your plastic consumption and reuse or recycle plastic when you can.
• Properly dispose of chemical cleaners, oils, and nonbiodegradable items to keep them from going down the drain.
• Maintain your car so it doesn’t leak oil, antifreeze, or coolant.
• If you have a yard, consider landscaping that reduces runoff and avoid applying pesticides and herbicides .
• Don’t flush your old medications! Dispose of them in the trash to prevent them from entering local waterways.
• Be mindful of anything you pour into storm sewers, since that waste often won’t be treated before being released into local waterways. If you notice a storm sewer blocked by litter, clean it up to keep that trash out of the water. (You’ll also help prevent troublesome street floods in a heavy storm.)
• If you have a pup, be sure to pick up its poop .

With your voice

One of the most effective ways to stand up for our waters is to speak out in support of the Clean Water Act, which has helped hold polluters accountable for five decades—despite attempts by destructive industries to gut its authority. But we also need regulations that keep pace with modern-day challenges, including microplastics, PFAS , pharmaceuticals, and other contaminants our wastewater treatment plants weren’t built to handle, not to mention polluted water that’s dumped untreated.

Tell the federal government, the U.S. Army Corps of Engineers, and your local elected officials that you support water protections and investments in infrastructure, like wastewater treatment, lead-pipe removal programs, and stormwater-abating green infrastructure. Also, learn how you and those around you can get involved in the policymaking process . Our public waterways serve every one of us. We should all have a say in how they’re protected.

This story was originally published on May 14, 2018, and has been updated with new information and links.

This NRDC.org story is available for online republication by news media outlets or nonprofits under these conditions: The writer(s) must be credited with a byline; you must note prominently that the story was originally published by NRDC.org and link to the original; the story cannot be edited (beyond simple things such as grammar); you can’t resell the story in any form or grant republishing rights to other outlets; you can’t republish our material wholesale or automatically—you need to select stories individually; you can’t republish the photos or graphics on our site without specific permission; you should drop us a note to let us know when you’ve used one of our stories.

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Essay on Water Pollution: Samples in 200, 500 Words

• Updated on  
• Mar 23, 2024

Essay on Water Pollution: Water pollution occurs when human activities introduce toxic substances into freshwater ecosystems such as lakes, rivers, oceans, and groundwater, leading to the degradation of water quality. The combination of harmful chemicals with water has a negative impact on these ecosystems. 

Various human actions, particularly those affecting land, water, and underwater surfaces, contribute to this pollution, disrupting the natural supply of clean water and posing a significant danger to all forms of life, including humans.

This Blog Includes:

What is water pollution, contaminants , solution , reasons for water pollution, methods of water pollution management, real-life encounter.

Also Read: Types of Water Pollution

When many pollutants such as garbage, chemicals, bacteria, household waste, industrial waste, etc get mixed in the water resources and make the water unfit for cooking, drinking, cleaning, etc. it is known as water pollution. Water pollution damages the quality of water. lakes, water streams, rivers, etc may become polluted and eventually they will pollute the oceans. All this will directly or indirectly affect the lives of us humans and the animals deteriorating our health.

Essay on Water Pollution in 200 Words

Water is plentiful on Earth, present both above and beneath its surface. A variety of water bodies, such as rivers, ponds, seas, and oceans, can be found on the planet’s surface. Despite Earth’s ability to naturally replenish its water, we are gradually depleting and mishandling this abundant resource. 

Although water covers 71% of the Earth’s surface and land constitutes the remaining 29%, the rapid expansion of water pollution is impacting both marine life and humans. 

Water pollution stems significantly from city sewage and industrial waste discharge. Indirect sources of water pollution include contaminants that reach water supplies via soil, groundwater systems, and precipitation. 

Chemical pollutants pose a greater challenge in terms of removal compared to visible impurities, which can be filtered out through physical cleaning. The addition of chemicals alters water’s properties, rendering it unsafe and potentially lethal for consumption.

Prioritizing water infrastructure enhancement is vital for sustainable water management, with a focus on water efficiency and conservation. 

Furthermore, rainwater harvesting and reuse serve as effective strategies to curb water pollution. Reclaimed wastewater and collected rainwater alleviate stress on groundwater and other natural water sources. 

Groundwater recharge, which transfers water from surface sources to groundwater, is a well-known approach to mitigate water scarcity. These measures collectively contribute to safeguarding the planet’s water resources for present and future generations.

Here is a list of Major Landforms of the Earth !

Essay on Water Pollution in 500 Words

The term “water pollution” is employed when human or natural factors lead to contamination of bodies of water, such as rivers, lakes, and oceans. Responsible management is now imperative to address this significant environmental concern. The primary sources of water contamination are human-related activities like urbanization, industrialization, deforestation, improper waste disposal, and the establishment of landfills.

The availability of freshwater on our planet is limited, and pollution only increases this scarcity. Every year, a substantial amount of fresh water is lost due to industrial and various other types of pollution. Pollutants encompass visible waste items of varying sizes as well as intangible, hazardous, and lethal compounds.

Numerous factories are situated in proximity to water bodies, utilizing freshwater to transport their waste. This industrial waste carries inherent toxicity, jeopardizing the well-being of both plant and animal life. Individuals living close to polluted water sources frequently suffer from skin problems, respiratory ailments, and occasionally even life-threatening health conditions.

Water contamination is also intensified by urban waste and sewage, adding to the problem. Each household generates considerable waste annually, including plastic, chemicals, wood, and other materials. Inadequate waste disposal methods result in this refusal to infiltrate aquatic ecosystems like rivers, lakes, and streams, leading to pollution.

Raising awareness about the causes and consequences of water pollution is crucial in significantly reducing its prevalence. Encouraging community or organizational clean-up initiatives on a weekly or monthly basis plays a pivotal role. 

To eradicate water contamination completely, stringent legislation needs to be formulated and diligently enforced. Rigorous oversight would promote accountability, potentially deterring individuals and groups from polluting. Each individual should recognize the impact of their daily actions and take steps to contribute to a better world for generations to come.

My affection for my town has always been heightened by its abundant lakes, rivers, and forests. During one of my walks alongside the river that flowed through my village, I was struck by the unusual hues swirling within the water. The once-familiar crystal-clear blue had been replaced by a murky brown shade, accompanied by a potent, unpleasant odour. Intrigued, I decided to investigate further, descending to the riverbank for a closer look at the source of the peculiar colours and smells. Upon closer inspection, I observed peculiar foam bubbles floating on the water’s surface.

Suddenly, a commotion behind me caught my attention, and I turned to witness a group of people hastening toward the river. Their frantic shouts and vigorous gestures conveyed their panic, prompting me to realize that a grave situation was unfolding. As the group reached the river, they were confronted with the distressing sight of numerous lifeless fish floating on the water’s surface. 

Following a comprehensive investigation, it was revealed that a local factory had been releasing toxic chemicals into the river, resulting in extensive pollution and the devastation of the ecosystem. This investigation left me stunned and disheartened, acknowledging the significant effort required to restore the river to its own form.

Related Reads:-     

A. Water pollution refers to the contamination of water bodies, such as rivers, lakes, oceans, and groundwater, due to the introduction of harmful substances. These substances can include chemicals, industrial waste, sewage, and pollutants that adversely affect the quality of water, making it unsafe for human consumption and harmful to aquatic life.

A. The primary sources of water pollution include city sewage and industrial waste discharge. Chemical contaminants from factories and agricultural runoff, as well as oil spills and plastic waste, contribute significantly to water pollution. Runoff from paved surfaces and improper waste disposal also play a role in introducing pollutants into water bodies.

A. Water pollution has far-reaching consequences. It poses a threat to aquatic ecosystems by harming marine life, disrupting food chains, and damaging habitats. Additionally, contaminated water can lead to the spread of waterborne diseases among humans. Toxic chemicals in polluted water can cause serious health issues, affecting the skin, and respiratory systems, and even leading to long-term illnesses. 

This brings us to the end of our blog on Essay on Water Pollution. Hope you find this information useful. For more information on such informative topics for your school, visit our  essay writing  and follow  Leverage Edu

Aditi Gupta

A bachelors in Journalism and Mass Communication graduate, I am an enthusiastic writer. I love to write about impactful content which can help others. I love to binge watch and listen to music during my free time.

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Water pollution: an introduction

by Chris Woodford . Last updated: October 1, 2023.

O ver two thirds of Earth's surface is covered by water ; less than a third is taken up by land. As Earth's population continues to grow, people are putting ever-increasing pressure on the planet's water resources. In a sense, our oceans, rivers , and other inland waters are being "squeezed" by human activities—not so they take up less room, but so their quality is reduced. Poorer water quality means water pollution .

We know that pollution is a human problem because it is a relatively recent development in the planet's history: before the 19th century Industrial Revolution, people lived more in harmony with their immediate environment. As industrialization has spread around the globe, so the problem of pollution has spread with it. When Earth's population was much smaller, no one believed pollution would ever present a serious problem. It was once popularly believed that the oceans were far too big to pollute. Today, with around 7 billion people on the planet, it has become apparent that there are limits. Pollution is one of the signs that humans have exceeded those limits.

Photo: Stormwater pollution entering a river from a drain. Photo by Peter C Van Metre courtesy of US Geological Survey .

What is water pollution?

Water pollution can be defined in many ways. Usually, it means one or more substances have built up in water to such an extent that they cause problems for animals or people. Oceans, lakes, rivers, and other inland waters can naturally clean up a certain amount of pollution by dispersing it harmlessly. If you poured a cup of black ink into a river, the ink would quickly disappear into the river's much larger volume of clean water. The ink would still be there in the river, but in such a low concentration that you would not be able to see it. At such low levels, the chemicals in the ink probably would not present any real problem. However, if you poured gallons of ink into a river every few seconds through a pipe, the river would quickly turn black. The chemicals in the ink could very quickly have an effect on the quality of the water. This, in turn, could affect the health of all the plants, animals, and humans whose lives depend on the river.

Photo: Pollution means adding substances to the environment that don't belong there—like the air pollution from this smokestack. Pollution is not always as obvious as this, however.

Thus, water pollution is all about quantities : how much of a polluting substance is released and how big a volume of water it is released into. A small quantity of a toxic chemical may have little impact if it is spilled into the ocean from a ship. But the same amount of the same chemical can have a much bigger impact pumped into a lake or river, where there is less clean water to disperse it.

"The introduction by man, directly or indirectly, of substances or energy into the marine environment (including estuaries) resulting in such deleterious effects as harm to living resources, hazards to human health, hindrance to marine activities, including fishing, impairment of quality for use of sea water and reduction of amenities." [1]

What are the main types of water pollution?

When we think of Earth's water resources, we think of huge oceans, lakes, and rivers. Water resources like these are called surface waters . The most obvious type of water pollution affects surface waters. For example, a spill from an oil tanker creates an oil slick that can affect a vast area of the ocean.

Photo: Detergent pollution entering a river—an example of surface water pollution. Photo courtesy of US Fish & Wildlife Service Photo Library.

Not all of Earth's water sits on its surface, however. A great deal of water is held in underground rock structures known as aquifers, which we cannot see and seldom think about. Water stored underground in aquifers is known as groundwater . Aquifers feed our rivers and supply much of our drinking water. They too can become polluted, for example, when weed killers used in people's gardens drain into the ground. Groundwater pollution is much less obvious than surface-water pollution, but is no less of a problem. In 1996, a study in Iowa in the United States found that over half the state's groundwater wells were contaminated with weed killers. You might think things would have improved since then, but, two decades on, all that's really changed is the name of the chemicals we're using. Today, numerous scientific studies are still finding weed killers in groundwater in worrying quantities: a 2012 study discovered glyphosate in 41 percent of 140 groundwater samples from Catalonia, Spain; scientific opinion differs on whether this is safe or not. [2]

Surface waters and groundwater are the two types of water resources that pollution affects. There are also two different ways in which pollution can occur. If pollution comes from a single location, such as a discharge pipe attached to a factory, it is known as point-source pollution . Other examples of point source pollution include an oil spill from a tanker, a discharge from a smoke stack (factory chimney), or someone pouring oil from their car down a drain. A great deal of water pollution happens not from one single source but from many different scattered sources. This is called nonpoint-source pollution .

When point-source pollution enters the environment, the place most affected is usually the area immediately around the source. For example, when a tanker accident occurs, the oil slick is concentrated around the tanker itself and, in the right ocean conditions, the pollution disperses the further away from the tanker you go. This is less likely to happen with nonpoint source pollution which, by definition, enters the environment from many different places at once.

Sometimes pollution that enters the environment in one place has an effect hundreds or even thousands of miles away. This is known as transboundary pollution . One example is the way radioactive waste travels through the oceans from nuclear reprocessing plants in England and France to nearby countries such as Ireland and Norway.

How do we know when water is polluted?

Some forms of water pollution are very obvious: everyone has seen TV news footage of oil slicks filmed from helicopters flying overhead. Water pollution is usually less obvious and much harder to detect than this. But how can we measure water pollution when we cannot see it? How do we even know it's there?

There are two main ways of measuring the quality of water. One is to take samples of the water and measure the concentrations of different chemicals that it contains. If the chemicals are dangerous or the concentrations are too great, we can regard the water as polluted. Measurements like this are known as chemical indicators of water quality. Another way to measure water quality involves examining the fish, insects, and other invertebrates that the water will support. If many different types of creatures can live in a river, the quality is likely to be very good; if the river supports no fish life at all, the quality is obviously much poorer. Measurements like this are called biological indicators of water quality.

What are the causes of water pollution?

Most water pollution doesn't begin in the water itself. Take the oceans: around 80 percent of ocean pollution enters our seas from the land. [16] Virtually any human activity can have an effect on the quality of our water environment. When farmers fertilize the fields, the chemicals they use are gradually washed by rain into the groundwater or surface waters nearby. Sometimes the causes of water pollution are quite surprising. Chemicals released by smokestacks (chimneys) can enter the atmosphere and then fall back to earth as rain, entering seas, rivers, and lakes and causing water pollution. That's called atmospheric deposition . Water pollution has many different causes and this is one of the reasons why it is such a difficult problem to solve.

With billions of people on the planet, disposing of sewage waste is a major problem. According to 2017 figures from the World Health Organization, some 2 billion people (about a quarter of the world's population) don't have access to safe drinking water or the most basic sanitation, 3.4 billion (60 people of the population) lack "safely managed" sanitation (unshared, with waste properly treated). Although there have been great improvements in securing access to clean water, relatively little, genuine progress has been made on improving global sanitation in the last decade. [20] Sewage disposal affects people's immediate environments and leads to water-related illnesses such as diarrhea that kills 525,000 children under five each year. [3] (Back in 2002, the World Health Organization estimated that water-related diseases could kill as many as 135 million people by 2020; in 2019, the WHO was still estimating the annual death toll from poor water and sanitation at over 800,000 people a year.) In developed countries, most people have flush toilets that take sewage waste quickly and hygienically away from their homes.

Yet the problem of sewage disposal does not end there. When you flush the toilet, the waste has to go somewhere and, even after it leaves the sewage treatment works, there is still waste to dispose of. Sometimes sewage waste is pumped untreated into the sea. Until the early 1990s, around 5 million tons of sewage was dumped by barge from New York City each year. [4] According to 2002 figures from the UK government's Department for the Environment, Food, and Rural Affairs (DEFRA), the sewers of Britain collect around 11 billion liters of waste water every day; there are still 31,000 sewage overflow pipes through which, in certain circumstances, such as heavy storms, raw sewage is pumped untreated into the sea. [5] The New River that crosses the border from Mexico into California once carried with it 20–25 million gallons (76–95 million liters) of raw sewage each day; a new waste water plant on the US-Mexico border, completed in 2007, substantially solved that problem. [6] Unfortunately, even in some of the richest nations, the practice of dumping sewage into the sea continues. In early 2012, it was reported that the tiny island of Guernsey (between Britain and France) has decided to continue dumping 16,000 tons of raw sewage into the sea each day.

In theory, sewage is a completely natural substance that should be broken down harmlessly in the environment: 90 percent of sewage is water. [7] In practice, sewage contains all kinds of other chemicals, from the pharmaceutical drugs people take to the paper , plastic , and other wastes they flush down their toilets. When people are sick with viruses, the sewage they produce carries those viruses into the environment. It is possible to catch illnesses such as hepatitis, typhoid, and cholera from river and sea water.

Photo: Nutrients make crops grow, but cause pollution when they seep into rivers and other watercourses. Photo courtesy of US Department of Agriculture (Flickr) .

Suitably treated and used in moderate quantities, sewage can be a fertilizer: it returns important nutrients to the environment, such as nitrogen and phosphorus, which plants and animals need for growth. The trouble is, sewage is often released in much greater quantities than the natural environment can cope with. Chemical fertilizers used by farmers also add nutrients to the soil, which drain into rivers and seas and add to the fertilizing effect of the sewage. Together, sewage and fertilizers can cause a massive increase in the growth of algae or plankton that overwhelms huge areas of oceans, lakes, or rivers. This is known as a harmful algal bloom (also known as an HAB or red tide, because it can turn the water red). It is harmful because it removes oxygen from the water that kills other forms of life, leading to what is known as a dead zone . The Gulf of Mexico has one of the world's most spectacular dead zones. Each summer, according to studies by the NOAA , it typically grows to an area of around 5500–6500 square miles (14,000–16,800 square kilometers), which is about the same size as the state of Connecticut. [21]

Waste water

A few statistics illustrate the scale of the problem that waste water (chemicals washed down drains and discharged from factories) can cause. Around half of all ocean pollution is caused by sewage and waste water. Each year, the world generates perhaps 5–10 billion tons of industrial waste, much of which is pumped untreated into rivers, oceans, and other waterways. [8] In the United States alone, around 400,000 factories take clean water from rivers, and many pump polluted waters back in their place. However, there have been major improvements in waste water treatment recently. Since 1970, in the United States, the Environmental Protection Agency (EPA) has invested about $70 billion in improving water treatment plants that, as of 2021, serve around 90 percent of the US population (compared to just 69 percent in 1972). However, another $271 billion is still needed to update and upgrade the system. [15]

Factories are point sources of water pollution, but quite a lot of water is polluted by ordinary people from nonpoint sources; this is how ordinary water becomes waste water in the first place. Virtually everyone pours chemicals of one sort or another down their drains or toilets. Even detergents used in washing machines and dishwashers eventually end up in our rivers and oceans. So do the pesticides we use on our gardens. A lot of toxic pollution also enters waste water from highway runoff . Highways are typically covered with a cocktail of toxic chemicals—everything from spilled fuel and brake fluids to bits of worn tires (themselves made from chemical additives) and exhaust emissions. When it rains, these chemicals wash into drains and rivers. It is not unusual for heavy summer rainstorms to wash toxic chemicals into rivers in such concentrations that they kill large numbers of fish overnight. It has been estimated that, in one year, the highway runoff from a single large city leaks as much oil into our water environment as a typical tanker spill. Some highway runoff runs away into drains; others can pollute groundwater or accumulate in the land next to a road, making it increasingly toxic as the years go by.

Chemical waste

Detergents are relatively mild substances. At the opposite end of the spectrum are highly toxic chemicals such as polychlorinated biphenyls (PCBs) . They were once widely used to manufacture electronic circuit boards , but their harmful effects have now been recognized and their use is highly restricted in many countries. Nevertheless, an estimated half million tons of PCBs were discharged into the environment during the 20th century. [9] In a classic example of transboundary pollution, traces of PCBs have even been found in birds and fish in the Arctic. They were carried there through the oceans, thousands of miles from where they originally entered the environment. Although PCBs are widely banned, their effects will be felt for many decades because they last a long time in the environment without breaking down.

Another kind of toxic pollution comes from heavy metals , such as lead, cadmium, and mercury. Lead was once commonly used in gasoline (petrol), though its use is now restricted in some countries. Mercury and cadmium are still used in batteries (though some brands now use other metals instead). Until recently, a highly toxic chemical called tributyltin (TBT) was used in paints to protect boats from the ravaging effects of the oceans. Ironically, however, TBT was gradually recognized as a pollutant: boats painted with it were doing as much damage to the oceans as the oceans were doing to the boats.

The best known example of heavy metal pollution in the oceans took place in 1938 when a Japanese factory discharged a significant amount of mercury metal into Minamata Bay, contaminating the fish stocks there. It took a decade for the problem to come to light. By that time, many local people had eaten the fish and around 2000 were poisoned. Hundreds of people were left dead or disabled. [10]

Radioactive waste

People view radioactive waste with great alarm—and for good reason. At high enough concentrations it can kill; in lower concentrations it can cause cancers and other illnesses. The biggest sources of radioactive pollution in Europe are two factories that reprocess waste fuel from nuclear power plants : Sellafield on the north-west coast of Britain and Cap La Hague on the north coast of France. Both discharge radioactive waste water into the sea, which ocean currents then carry around the world. Countries such as Norway, which lie downstream from Britain, receive significant doses of radioactive pollution from Sellafield. [19] The Norwegian government has repeatedly complained that Sellafield has increased radiation levels along its coast by 6–10 times. Both the Irish and Norwegian governments continue to press for the plant's closure. [11]

Oil pollution

Photo: Oil-tanker spills are the most spectacular forms of pollution and the ones that catch public attention, but only a fraction of all water pollution happens this way. Photo by Lamar Gore courtesy of US Fish & Wildlife Service Photo Library and US National Archive .

When we think of ocean pollution, huge black oil slicks often spring to mind, yet these spectacular accidents represent only a tiny fraction of all the pollution entering our oceans. Even considering oil by itself, tanker spills are not as significant as they might seem: only 12 percent of the oil that enters the oceans comes from tanker accidents; over 70 percent of oil pollution at sea comes from routine shipping and from the oil people pour down drains on land. [12] However, what makes tanker spills so destructive is the sheer quantity of oil they release at once — in other words, the concentration of oil they produce in one very localized part of the marine environment. The biggest oil spill in recent years (and the biggest ever spill in US waters) occurred when the tanker Exxon Valdez broke up in Prince William Sound in Alaska in 1989. Around 12 million gallons (44 million liters) of oil were released into the pristine wilderness—enough to fill your living room 800 times over! Estimates of the marine animals killed in the spill vary from approximately 1000 sea otters and 34,000 birds to as many as 2800 sea otters and 250,000 sea birds. Several billion salmon and herring eggs are also believed to have been destroyed. [13]

If you've ever taken part in a community beach clean, you'll know that plastic is far and away the most common substance that washes up with the waves. There are three reasons for this: plastic is one of the most common materials, used for making virtually every kind of manufactured object from clothing to automobile parts; plastic is light and floats easily so it can travel enormous distances across the oceans; most plastics are not biodegradable (they do not break down naturally in the environment), which means that things like plastic bottle tops can survive in the marine environment for a long time. (A plastic bottle can survive an estimated 450 years in the ocean and plastic fishing line can last up to 600 years.)

While plastics are not toxic in quite the same way as poisonous chemicals, they nevertheless present a major hazard to seabirds, fish, and other marine creatures. For example, plastic fishing lines and other debris can strangle or choke fish. (This is sometimes called ghost fishing .) About half of all the world's seabird species are known to have eaten plastic residues. In one study of 450 shearwaters in the North Pacific, over 80 percent of the birds were found to contain plastic residues in their stomachs. In the early 1990s, marine scientist Tim Benton collected debris from a 2km (1.5 mile) length of beach in the remote Pitcairn islands in the South Pacific. His study recorded approximately a thousand pieces of garbage including 268 pieces of plastic, 71 plastic bottles, and two dolls heads. [14]

Alien species

Most people's idea of water pollution involves things like sewage, toxic metals, or oil slicks, but pollution can be biological as well as chemical. In some parts of the world, alien species are a major problem. Alien species (sometimes known as invasive species ) are animals or plants from one region that have been introduced into a different ecosystem where they do not belong. Outside their normal environment, they have no natural predators, so they rapidly run wild, crowding out the usual animals or plants that thrive there. Common examples of alien species include zebra mussels in the Great Lakes of the USA, which were carried there from Europe by ballast water (waste water flushed from ships ). The Mediterranean Sea has been invaded by a kind of alien algae called Caulerpa taxifolia . In the Black Sea, an alien jellyfish called Mnemiopsis leidyi reduced fish stocks by 90 percent after arriving in ballast water. In San Francisco Bay, Asian clams called Potamocorbula amurensis, also introduced by ballast water, have dramatically altered the ecosystem. In 1999, Cornell University's David Pimentel estimated that alien invaders like this cost the US economy $123 billion a year; in 2014, the European Commission put the cost to Europe at €12 billion a year and "growing all the time. [18]

Other forms of pollution

These are the most common forms of pollution—but by no means the only ones. Heat or thermal pollution from factories and power plants also causes problems in rivers. By raising the temperature, it reduces the amount of oxygen dissolved in the water, thus also reducing the level of aquatic life that the river can support. Another type of pollution involves the disruption of sediments (fine-grained powders) that flow from rivers into the sea. Dams built for hydroelectric power or water reservoirs can reduce the sediment flow. This reduces the formation of beaches, increases coastal erosion (the natural destruction of cliffs by the sea), and reduces the flow of nutrients from rivers into seas (potentially reducing coastal fish stocks). Increased sediments can also present a problem. During construction work, soil, rock, and other fine powders sometimes enters nearby rivers in large quantities, causing it to become turbid (muddy or silted). The extra sediment can block the gills of fish, effectively suffocating them. Construction firms often now take precautions to prevent this kind of pollution from happening.

What are the effects of water pollution?

Some people believe pollution is an inescapable result of human activity: they argue that if we want to have factories, cities, ships, cars, oil, and coastal resorts, some degree of pollution is almost certain to result. In other words, pollution is a necessary evil that people must put up with if they want to make progress. Fortunately, not everyone agrees with this view. One reason people have woken up to the problem of pollution is that it brings costs of its own that undermine any economic benefits that come about by polluting.

Take oil spills, for example. They can happen if tankers are too poorly built to survive accidents at sea. But the economic benefit of compromising on tanker quality brings an economic cost when an oil spill occurs. The oil can wash up on nearby beaches, devastate the ecosystem, and severely affect tourism. The main problem is that the people who bear the cost of the spill (typically a small coastal community) are not the people who caused the problem in the first place (the people who operate the tanker). Yet, arguably, everyone who puts gasoline (petrol) into their car—or uses almost any kind of petroleum-fueled transport—contributes to the problem in some way. So oil spills are a problem for everyone, not just people who live by the coast and tanker operates.

Sewage is another good example of how pollution can affect us all. Sewage discharged into coastal waters can wash up on beaches and cause a health hazard. People who bathe or surf in the water can fall ill if they swallow polluted water—yet sewage can have other harmful effects too: it can poison shellfish (such as cockles and mussels) that grow near the shore. People who eat poisoned shellfish risk suffering from an acute—and sometimes fatal—illness called paralytic shellfish poisoning. Shellfish is no longer caught along many shores because it is simply too polluted with sewage or toxic chemical wastes that have discharged from the land nearby.

Pollution matters because it harms the environment on which people depend. The environment is not something distant and separate from our lives. It's not a pretty shoreline hundreds of miles from our homes or a wilderness landscape that we see only on TV. The environment is everything that surrounds us that gives us life and health. Destroying the environment ultimately reduces the quality of our own lives—and that, most selfishly, is why pollution should matter to all of us.

How can we stop water pollution?

There is no easy way to solve water pollution; if there were, it wouldn't be so much of a problem. Broadly speaking, there are three different things that can help to tackle the problem—education, laws, and economics—and they work together as a team.

Making people aware of the problem is the first step to solving it. In the early 1990s, when surfers in Britain grew tired of catching illnesses from water polluted with sewage, they formed a group called Surfers Against Sewage to force governments and water companies to clean up their act. People who've grown tired of walking the world's polluted beaches often band together to organize community beach-cleaning sessions. Anglers who no longer catch so many fish have campaigned for tougher penalties against factories that pour pollution into our rivers. Greater public awareness can make a positive difference.

One of the biggest problems with water pollution is its transboundary nature. Many rivers cross countries, while seas span whole continents. Pollution discharged by factories in one country with poor environmental standards can cause problems in neighboring nations, even when they have tougher laws and higher standards. Environmental laws can make it tougher for people to pollute, but to be really effective they have to operate across national and international borders. This is why we have international laws governing the oceans, such as the 1982 UN Convention on the Law of the Sea (signed by over 120 nations), the 1972 London (Dumping) Convention , the 1978 MARPOL International Convention for the Prevention of Pollution from Ships , and the 1998 OSPAR Convention for the Protection of the Marine Environment of the North East Atlantic . The European Union has water-protection laws (known as directives) that apply to all of its member states. They include the 1976 Bathing Water Directive (updated 2006), which seeks to ensure the quality of the waters that people use for recreation. Most countries also have their own water pollution laws. In the United States, for example, there is the 1972 Clean Water Act and the 1974 Safe Drinking Water Act .

Most environmental experts agree that the best way to tackle pollution is through something called the polluter pays principle . This means that whoever causes pollution should have to pay to clean it up, one way or another. Polluter pays can operate in all kinds of ways. It could mean that tanker owners should have to take out insurance that covers the cost of oil spill cleanups, for example. It could also mean that shoppers should have to pay for their plastic grocery bags, as is now common in Ireland, to encourage recycling and minimize waste. Or it could mean that factories that use rivers must have their water inlet pipes downstream of their effluent outflow pipes, so if they cause pollution they themselves are the first people to suffer. Ultimately, the polluter pays principle is designed to deter people from polluting by making it less expensive for them to behave in an environmentally responsible way.

Our clean future

Life is ultimately about choices—and so is pollution. We can live with sewage-strewn beaches, dead rivers, and fish that are too poisonous to eat. Or we can work together to keep the environment clean so the plants, animals, and people who depend on it remain healthy. We can take individual action to help reduce water pollution, for example, by using environmentally friendly detergents , not pouring oil down drains, reducing pesticides, and so on. We can take community action too, by helping out on beach cleans or litter picks to keep our rivers and seas that little bit cleaner. And we can take action as countries and continents to pass laws that will make pollution harder and the world less polluted. Working together, we can make pollution less of a problem—and the world a better place.

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Text copyright © Chris Woodford 2006, 2022. All rights reserved. Full copyright notice and terms of use .

This article was originally written for the UK Rivers Network and first published on their website in April 2006. It is revised and updated every year.

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• Biology Article
• Water Pollution Control

Water Pollution And Its Control

Water is one of the most vital natural resources on earth and has been around for a long time. In fact, the same water which we drink has been around in one form or the other since the time of the dinosaurs.

The earth has more than two-thirds of its surface covered with water. This translates to just over 1 octillion litres (1,260,000,000,000,000,000,000 litres) of water distributed in the oceans, rivers, lakes and streams.

That is a lot of water, however, less than 0.3% is accessible for human consumption. As commercialization and industrialization have progressed, that number continues to dwindle down. Furthermore, inefficient and outdated practices, lack of awareness and a plethora of other circumstances have led to water pollution.

Also Read: How Can We Conserve Water?

• Water pollution
• Modern Epidemic

Minamata Incident

• Ganges River

What is Water Pollution?

Water pollution can be defined as the contamination of water bodies. Water pollution is caused when water bodies such as rivers, lakes, oceans, groundwater and aquifers get contaminated with industrial and agricultural effluents.

When water gets polluted, it adversely affects all lifeforms that directly or indirectly depend on this source. The effects of water contamination can be felt for years to come.

Also Refer:  Types of Pollution

Sources Of Water Pollution

The key causative of water pollution in India are:

• Urbanization.
• Deforestation.
• Industrial effluents.
• Social and Religious Practices.
• Use of Detergents and Fertilizers.
• Agricultural run-offs- Use of insecticides and pesticides.

Water Pollution – A Modern Epidemic

One of the primary causes of water pollution is the contamination of water bodies by toxic chemicals. As seen in the example mentioned above, the dumped plastic bottles, tins, water cans and other wastes pollute the water bodies. These result in water pollution, which harms not just humans, but the whole ecosystem. Toxins drained from these pollutants, travel up to the food chain and eventually affect humans. In most cases, the outcome is destructive to only the local population and species, but it can have an impact on a global scale too.

Nearly 6 billion kilograms of garbage is dumped every year in the oceans. Apart from industrial effluents and untreated sewage, other forms of unwanted materials are dumped into various water bodies. These can range from nuclear waste to oil spills – the latter of which can render vast areas uninhabitable.

Effects Of Water Pollution

The effect of water pollution depends upon the type of pollutants and their concentration. Also, the location of water bodies is an important factor to determine the levels of pollution.

• Water bodies in the vicinity of urban areas are extremely polluted. This is the result of dumping garbage and toxic chemicals by industrial and commercial establishments.
• Water pollution drastically affects aquatic life. It affects their metabolism, and behaviour, and causes illness and eventual death. Dioxin is a chemical that causes a lot of problems from reproduction to uncontrolled cell growth or cancer. This chemical is bioaccumulated in fish, chicken and meat. Chemicals such as this travel up the food chain before entering the human body.
• The effect of water pollution can have a huge impact on the food chain. It disrupts the food chain. Cadmium and lead are some toxic substances, these pollutants upon entering the food chain through animals (fish when consumed by animals, humans) can continue to disrupt at higher levels.
• Humans are affected by pollution and can contract diseases such as hepatitis through faecal matter in water sources. Poor drinking water treatment and unfit water can always cause an outbreak of infectious diseases such as cholera, etc.
• The ecosystem can be critically affected, modified and destructured because of water pollution.

The Minamata Incident marked one of the worst cases of water pollution

In 1932, a factory in Minamata City, Japan began dumping its industrial effluent – Methylmercury, into the surrounding bay and the sea. Methylmercury is incredibly toxic to humans and animals alike, causing a wide range of neurological disorders.

Its ill effects were not immediately noticeable. However, this all changed as methylmercury started to bioaccumulate inside shellfish and fish in Minamata Bay. These affected organisms were then caught and consumed by the local population. Soon, the ill effects of methylmercury were becoming apparent.

Initially, animals such as cats and dogs were affected by this. The city’s cats would often convulse and make strange noises before dying – hence, the term “dancing cat disease” was coined. Soon, the same symptoms were observed in people, though the cause was not apparent at the time.

Other affected people showed symptoms of acute mercury poisoning such as ataxia, muscle weakness, loss of motor coordination, damage to speech and hearing etc. In severe cases, paralysis occurred, which was followed by coma and death.  These diseases and deaths continued for almost 36 years before they could be officially acknowledged by the government and the organisation.

Since then, various control measures for water pollution have been adopted by the government of Japan to curb such environmental disasters in the future.

Pollution of the Ganges

Some rivers, lakes, and groundwater are rendered unfit for usage. In India, the River Ganges is the sixth most polluted river in the world. This is unsurprising as hundreds of industries nearby release their effluents into the river. Furthermore, religious activities such as burials and cremations near the shore contribute to pollution. Apart from the ecological implications, this river poses a serious health risks as it can cause diseases like typhoid and cholera.

Pollution of the Ganges is also driving some of the distinct fauna to extinction. The Ganges River shark is a critically endangered species that belong to the order Carcharhiniformes. The Ganges River dolphin is another  endangered species of dolphin that is found in the tributaries of the Ganges and Brahmaputra rivers.

As per a survey, by the end of 2026, around 4 billion people will face a shortage of water. Presently, around 1.2 billion people worldwide do not have access to clean, potable water and proper sanitation. It is also projected that nearly 1000 children die every year in India due to water-related issues. Groundwater is an important source of water, but unfortunately, even that is susceptible to pollution. Hence, water pollution is quite an important social issue that needs to be addressed promptly.

Control Measures of Water Pollution

Water pollution, to a larger extent, can be controlled by a variety of methods. Rather than releasing sewage waste into water bodies, it is better to treat them before discharge. Practising this can reduce the initial toxicity and the remaining substances can be degraded and rendered harmless by the water body itself. If the secondary treatment of water has been carried out, then this can be reused in sanitary systems and agricultural fields.

A very special plant, the Water Hyacinth can absorb dissolved toxic chemicals such as cadmium and other such elements. Establishing these in regions prone to such kinds of pollutants will reduce the adverse effects to a large extent.

Some chemical methods that help in the control of water pollution are precipitation, the ion exchange process, reverse osmosis , and coagulation. As an individual, reusing, reducing, and recycling wherever possible will advance a long way in overcoming the effects of water pollution.

Further Reading:

Frequently Asked Questions

What is sewage treatment.

Wastewater treatment or sewage treatment generally refers to the process of cleaning or removing all pollutants, treating wastewater and making it safe and suitable for drinking before releasing it into the environment.

What are the main steps in sewage treatment?

There are four main stages of the wastewater treatment process, namely:

• Stage 1: Screening
• Stage 2: Primary treatment
• Stage 3: Secondary treatment
• Stage 4: Final treatment

What are the main causes of water pollution?

The main causes of water pollution are attributed to

• Industrial activities
• Urbanization
• Religious and social practices
• Agricultural runoff
• Accidents (such as oil spills, nuclear fallouts etc)

What are the effects of water pollution?

Water pollution can have disastrous consequences on the ecosystem. Furthermore, toxic chemicals can travel through the food chain and get into our bodies, causing diseases and death.

To learn more about water pollution, causes, effects, preventive measures and other important environmental concerns (such as eutrophication), visit us at BYJU’S Biology.

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• Water Pollution Essay

Water Pollution and How it Harms the Environment

Global pollution is a problem. Pollution can spread to remote areas where no one lives, despite the fact that urban areas are typically more polluted than the countryside. Air pollution, water pollution, and land pollution are the three main categories of pollution. Some contaminated water has a terrible smell, a muddy appearance, and floating trash. Some contaminated water appears clean, but it contains dangerous substances that you can't see or smell.

Together, developed and developing nations must fight to conserve the environment for present and future generations. Today, we dig deep into the subject of Water Pollution. This article can be an introduction to water pollution for kids as we will read many things such as the causes of water pollution further in the article.

What is Water Pollution?

Water contamination occurs when pollutants pollute water sources and make the water unfit for use in drinking, cooking, cleaning, swimming, and other activities. Chemicals, garbage, bacteria, and parasites are examples of pollutants. Water is eventually damaged by all types of pollution. Lakes and oceans become contaminated by air pollution. Land contamination may contaminate an underground stream, a river, and ultimately the ocean. As a result, trash thrown on an empty lot can eventually contaminate a water source.

(Image will be uploaded soon)

Water Pollution

The water cycle, called  the hydrological cycle, involves the following steps:

Evaporation- Because of the sun's heat, the water bodies such as oceans, lakes, seas etc., get heated up, and water evaporates in the air, forming water vapours.

Transpiration- Like evaporation, the plants and trees also lose water from them which goes to the atmosphere. This process is called transpiration.

Condensation- As the water evaporates, it starts to become cool because of the cold atmosphere in the air and because of this cooling down of water leads to the formation of clouds.

Precipitation- Because of the high movements of the wings, the clouds start to collide and then fall back to the earth’s surface in the form of rain. Sometimes they also fall back in the form of snow, hail, sleet etc., depending upon the temperature.

Runoff or Infiltration- After precipitation, the water either flows to the water bodies called runoff or is absorbed into the soil, called infiltration.

Causes of Water Pollution

There are many reasons for water pollution. Some of the reasons are directly affected by water pollution and some indirectly. Many factories and industries are dumping contaminated water, chemicals, and heavy metals into major waterways as a result of direct water pollution. 

One more reason for water pollution is the use of modern techniques in farms. Farmers apply nutrients such as phosphorus, nitrogen, and potassium in the form of chemical fertilizers, manure, and sludge. It causes farms to discharge large quantities of agrochemicals, organic matter, and saline drainage into water bodies. It indirectly affects water pollution.

Pollutants can be of various types such as organic, inorganic, radioactive etc. Water pollutants are discharged either from one point from pipes, channels etc., which are called point sources or from various other sources. They can be agricultural areas, industries etc., called dispersed sources. 

Some of the major forms of water pollutants are as follows:

Sewage- Domestic sewage from homes contains various forms of pathogens that threaten the human body. Sewage treatment reduces the risk of pathogens, but this risk is not eliminated. 

Domestic sewage majorly contains nitrates and phosphates, and excess of these substances allows the algae to grow on the surface of water bodies. Due to this, the clean water bodies become nutrient-rich water body and then slowly, the oxygen level of water bodies reduces. This is called eutrophication or cultural eutrophication (if this step rapidly takes place by the activities of humans). This leads to the early death of water bodies.

Toxins- The industrial or factory wastes that are not disposed of properly and contain chemicals such as mercury and lead are disposed of in the water bodies making the bodies toxic, radioactive, explosive and cancerous.

Sediments- Sediments are the result of soil erosion that is formed in the water bodies. These sediments imbalances the water bodies ecologically. They also interfere in the reproductive cycle of various aquatic animals living in the water.

Thermal pollution- Water bodies get polluted because of heat, and excess heat reduces the oxygen level of the water bodies. Some of the species of fish cannot live in such water bodies with very low oxygen levels. The disposal of cold waters from the power plants leads to increased thermal pollution in the water bodies.

Petroleum oil pollution- The runoff of oil into the water bodies, either accidentally as happened in 2010 in the Gulf of Mexico, or intentionally, leads to an increase in water pollution.

As water is an important element of human health, polluted water directly affects the human body. Water pollution causes various diseases like typhoid, cholera, hepatitis, cancer, etc. Water pollution damages the plants and aquatic animals present in the river by reducing the oxygen content from the water. Polluted water washes the essential nutrients which plants need out of the soil and also leaves large amounts of aluminium in the soil, which can be harmful to plants. 

Wastewater and sewage are a by-product of daily life and thus produced by each household through various activities like using soap, toilets, and detergents. Such sewage contains chemicals and bacteria which are harmful to human life and environmental health. Water pollution also leads to an imbalance in our ecosystem. Lastly, it also affects the food chain as the toxins in the water bodies are consumed by aquatic animals like fish, crabs etc., and then humans consume those animals forming turmoil. 

Sometimes our tradition also becomes a cause for water pollution. Some people throw the statues of deities, flowers, pots, and ashes in rivers.

There are various standards to define water quality standards. Water meant for swimming may not be clean enough for drinking, or water meant for bathing may not be good for cooking. Therefore, there are different water standards for defined:

Stream standards- Standards that define streams, lakes, oceans or seas based on their maximum use.

Effluent standards- Define the specific standards for the level of contaminants or effluents allowed during the final discharge of those into the water bodies.

Drinking water standards- Define the level of contamination allowed in water that will be supplied for drinking or cooking in the domestic areas.

Different countries regulate their water quality standards through different acts and amendments.

While many of the solutions for water pollution need to be applied on a broader macro-level for that individual, companies, and communities can have a significant and responsible impact on the water quality. Companies, factories have to dispose of leftover chemicals and containers properly as per the product instructions. Farmers also have to reduce the use of nitrates and phosphates from fertilizers, pesticides, and contamination of groundwater. 

The Swachh Bharat Mission of the government had led to reduced groundwater contamination. Under the Namami Ganga program, the government has initiated several major projects to clean Ganga. Along with all these steps, conservation of water is the very basic and important step towards water conservation and should be followed globally, treatment of sewage before their disposal in the water bodies and using environment-friendly products that do not form toxins when dissolved in water. These are some small steps that have to be taken into consideration by every human being.

As we all know, “Water is life’s matter and matrix, mother and medium. There is no life without water.” We have to save water. We must keep the water clean. If everyone will follow their responsibility against water to protect it from getting polluted then it will be easy to get clean and healthy drinking water. Clean water is a must for us and our kids' present, future, and healthy environment. 

We cannot just live with contaminated waters filled with toxins and no oxygen. We cannot see our wildlife being destroyed and therefore, immediate steps have to be taken by groups of people to first clean the already contaminated water bodies and then keep a check on all the surrounding water bodies. Small steps by every individual can make a huge difference in controlling water pollution.

Water Pollution Prevention

Conserve Water 

Our first priority should be to conserve water. Water wasting could be a big problem for the entire world, but we are just now becoming aware of it.

Sewage Treatment 

Cleaning up waste materials before disposing of them in waterways reduces pollution on a large scale. By lowering its dangerous elements, this wastewater will be used in other sectors or in agriculture.

Usage of Eco-Friendly Materials

We will reduce the amount of pollution produced by choosing soluble products that do not alter to become pollutants.

Water contamination is the discharge of pollutants into the water body, where they dissolve, are suspended, are deposited on the bottom, and collect to the point where they hinder the aquatic ecosystem's ability to function. Water contamination is brought on by toxic compounds that easily dissolve and combine with it and come from factories, municipalities, and farms.

Healthy ecosystems depend on a complex network of organisms, including animals, plants, bacteria, and fungi, all of which interact with one another either directly or indirectly. In this article, we read about water pollution, its causes and prevention. With this, we have come to the end of our article, in case of any other doubts, feel free to ask in the comments.

FAQs on Water Pollution Essay

1. What are the effects of water pollution?

Water pollution has a great impact on human health. Water pollution kills. It's been recorded that in 2015 nearly 1.8 million people died because of water pollution. People with low income are exposed to contaminated water coming out from the industries. Presence of disease causing pathogens in drinking water are the major cause of illness which includes cholera, giardia, and typhoid. Water pollution not only affects human health but also our environment by causing algal bloom in a lake or marine environment. Water pollution also causes eutrophication which suffocates plants and animals and thus causes dead zones. Chemicals and heavy metals from industrial and municipal wastewater contaminate waterways and harm aquatic life.

2. What are the causes of Water pollution?

Water being a universal solvent is vulnerable to pollution as it dissolves more substances than any other liquid on earth. Therefore, water is easily polluted. Toxic substances from farms, towns, and factories readily dissolve into water and mix with it, resulting in water pollution. Agricultural pollution is one of the major causes of contamination in rivers and streams. The use of excessive fertilizers, pesticides, and animal waste from farms and livestock operations lets the rain wash the nutrients and pathogens—such as bacteria and viruses—into our waterways. The other major cause of water pollution is used water,  termed as wastewater which comes from our sinks, showers, toilets and from commercial, industrial, and agricultural activities. It's been reported that the world's 80% wastewater flows back into the environment without being treated or reused. Oil spills and radioactive waste also cause water pollution to a great extent.

3. How to prevent water pollution?

It is important to keep our water bodies clean so we can take the following preventive measures to prevent from water pollution:

Chemicals like bleach, paint, paint thinner, ammonia, and many chemicals are becoming a serious problem. Dumping toxic chemicals down the drain or flushing them down the toilet can cause water pollution. Thus, proper disposal is important. Also, household chemicals need to be recycled.

Avoid buying products that contain persistent and dangerous chemicals. Buying non-toxic cleaners and biodegradable cleaners and pesticides cut down on water pollution.

Prevent from pouring fats or greasy substances down the drain as it might clog the drain resulting in the dumping of waste into yards or basement which can contaminate the local water bodies.

4. What is the role of medical institutions in polluting the water?

Pharmaceutical pollution affects aquatic life and thus there is a need to take preventive measures. Consumers are responsible for winding up pharmaceutical and personal care products in lakes, rivers, and streams. There's a lot of unused and expired medication that can potentially get into the water if not disposed of properly.

5. What are the major kinds of pollution?

The three main types of pollution are air pollution, water pollution or soil pollution. Some artificial pollution is also there, such as noise pollution. Factors leading to such pollution include:

Air Pollution: Industrial emissions, fires, traffic and transportation, burning of chemical waste, etc.

Water Pollution: No proper sewage disposal, pesticides in farms leaking into water bodies, industrial waste dumped into water bodies, etc.

Soil Pollution:  Oil spills, acid rains, irresponsible disposal of trash, chemical waste, etc.

Noise Pollution: Honking of horns, construction activities, loud parties, etc.

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Home > Books > Water Challenges of an Urbanizing World

Water Pollution: Effects, Prevention, and Climatic Impact

Submitted: 04 April 2017 Reviewed: 27 October 2017 Published: 21 March 2018

DOI: 10.5772/intechopen.72018

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Water Challenges of an Urbanizing World

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The stress on our water environment as a result of increased industrialization, which aids urbanization, is becoming very high thus reducing the availability of clean water. Polluted water is of great concern to the aquatic organism, plants, humans, and climate and indeed alters the ecosystem. The preservation of our water environment, which is embedded in sustainable development, must be well driven by all sectors. While effective wastewater treatment has the tendency of salvaging the water environment, integration of environmental policies into the actor firms core objectives coupled with continuous periodical enlightenment on the present and future consequences of environmental/water pollution will greatly assist in conserving the water environment.

• chemical pollutants
• microbial pollutants
• sustainable development
• climate change

Author Information

Inyinbor adejumoke a. *.

• Department of Physical Sciences, Landmark University, Nigeria

Adebesin Babatunde O.

Oluyori abimbola p., adelani-akande tabitha a..

• Department of Biological Sciences, Landmark University, Nigeria

Dada Adewumi O.

Oreofe toyin a..

• Department of Chemical Engineering, Landmark University, Nigeria

*Address all correspondence to: [email protected]

1. Introduction

Industrialization, in any society, is a major initiator of development and urbanization. Although the merits of industrialization are innumerable, it has been identified as a major threat to the environment as it releases various toxic chemicals, gases, solid wastes as well as microbes of various kinds into our immediate environment—land, air, and water. Of particular interest is water pollution, which has become a global challenge, developing nations being highly affected due to their drive for development [ 1 , 2 ].

Pollution of our water bodies poses a great threat to humans and the aquatic ecosystem while marked population increase catalyzes climatic changes [ 3 ]. For instance, various human activities as well as the release of greenhouse gases by industries greatly contributes to global warming, planet temperature enhancement, and lowering of atmospheric air quality.

The drive for sustainable development must bring along water pollution prevention techniques. Effective wastewater treatment before their eventual discharge is one way to driving water pollution prevention. Some remediate climate change mitigation measures against water pollution can also be explored.

This chapter is aimed at critically discussing water pollution effects viz-a-viz global challenges, threat, and climatic impacts while also focusing on various possible preventive measures.

2. Water pollution

2.1. promoting environmental sustainability.

Sustainable development in any society is an access to initiate a good standard of living for the populace. It aims at providing solutions to the economic, environmental, and societal challenges without posing a threat to human and environmental future development, that is, we must consider the future as we make present decisions. Also, these include social progress and equality, environmental protection, conservation of natural resources, and stable economic growth [ 4 ].

There are numerous instances where urbanization has destroyed the environment and threatened its survival chances. Sustainable development put into consideration how we survive in the natural world protecting it from destruction and damages. One of the major challenges of urbanization is sustainability, as most developed or developing society now revitalizes a lot of natural resources daily. Most of these resources meet the needs of man but they are also limited. Sustainable development tends to balance the competing needs of the society.

In achieving this, many science bodies and institutions have seen the requisite of sustainable development and have set goals and targets to meet it. This also has pushed such institutions to have a role in measuring and monitoring the impact of these goals on the society. However, the contribution of scientist in sustainable development should not only focus on the environment. It should also take into consideration the health of the populace in ensuring that no area of life suffers [ 5 ].

While sustainable development may mean different things to different people, environmental sustainability is all encompassing. It is directly concerned with the future of humanity, and it defines how we should protect and handle the sustainability of resources, air quality, water quality, and ecosystems. It also helps to prevent the environment from impending damage from technological advancement. One way to achieving environmental sustainability is via effective wastewater treatment.

Various conventional wastewater treatment methods are available; their characteristics vary from complexities of operations through sludge generations among other things to various inadequacies. Their economic disadvantages are widely related to expensive equipment, complexities of operations and skilful manpower requirement. Many industries avoid the conventional wastewater treatment methods due to their economic disadvantages, hence discharging untreated or fairly treated wastewater into the water bodies. A simple and cheap wastewater treatment method will therefore facilitate effective wastewater treatment and protect the water environment from pollution.

2.2. Effects and challenges

Water is an essential and general need of life with an undeniable effect directly or indirectly. All industrial, environmental, and metabolic processes are water dependent. In living organisms, water plays a number of roles such as solvent, temperature buffer, metabolite, living environment, and lubricants [ 6 ]. Water, however, is said to be polluted when some of the water quality parameters have been hampered by unguided and irregularities from several anthropogenic activities, thus rendering water unfit for intended use.

Water pollution may pose serious threat to the environment as well as lives. Pollutant effects may vary depending on their types and source. For instance, while heavy metals, dyes, and some other organic pollutants have been identified as carcinogens, hormones, pharmaceuticals, and cosmetics and personal care product wastes are known as endocrine disruptive chemicals [ 7 ]. These pollutants, which enter into the water body through various channel but predominantly anthropogenic, have become a great concern to environmentalists due to various hazard they pose on the environment.

2.2.1. Heavy metal pollution

Heavy metals top the list of inorganic pollutant with wide range of negative effects on aquatic organisms, plants, and human. Heavy metals are released into the environment via different routes such as industries, mining activities, agricultural activities etc. [ 8 ]. Bioavailable metals present in the soil may be absorbed by plants resulting in serious plant metabolism dysfunctioning [ 9 ]. High heavy metal ion concentrations are also known to damage the cell membrane, affect enzyme involved in chlorophyll production, thus reducing photosynthetic rate as well as affect plant reproduction via decrease in pollen and seed viability [ 10 ].

Humans and animals can be exposed to heavy metal toxicity through the food web, direct consumption of water containing metal or via inhalation [ 11 ]. Heavy metals readily bioaccumulates in vegetables and enters into man and animal through food chain. Effects of heavy metal toxicity on human ranges from mild eye, nose and skin irritations through severe headache, stomach ache, diarrhea, hematemesis, vomiting, dizziness to organ dysfunctioning such as cirrhosis, necrosis, low blood pressure, hypertension, and gastrointestinal distress [ 12 ]. While some heavy metals also called essential elements (cobalt, copper, iron, manganese, vanadium, and zinc) are required in minute amount in the body for various biochemical processes; others such as lead, cadmium, arsenic, and mercury are of serious threat and considered foreign in the body. Looking at specifics, human ingestion of water polluted with arsenic can cause cancer of the lungs, liver, and bladder. Kidney and lungs damage as well as bone fragility may result when cadmium containing water is ingested. Exposure to lead can severely damage the brain and kidneys. In children, lead exposure even at very low concentration may hamper learning, cause memory loss, affect attention and response functions, and generally make children aggressive [ 13 , 14 ]. In pregnant women, high levels of exposure to lead may cause miscarriage, whereas in men, it can damage the organs responsible for sperm production. Mercury is unique amidst other heavy metals; it has the capacity to travel a wide range of distance, thus have been classified as a global pollutants. The chemical form of mercury in the environment is also important in analyzing their toxicity. The organic form of mercury, that is, methyl mercury (MeHg) and dimethyl mercury (DMeHg), is known to be more toxic than inorganic mercury [ 15 , 16 ]. While inhaled mercury goes into the blood stream, their elimination from the body is either through the urine or faeces. Mercury has the ability to exist in the urine for about 2 months, hence their renal dysfunctioning characteristic [ 16 ].

Many physiological disorders may accompany crustaceans’ exposure to metals, and instant metabolic activities’ alterations. Exposure of crustaceans to heavy metals may also result in loss of appetite for food and subsequently body weight loss. Continuous exposure may reduce reproduction in adults as well as hamper the growth larvae [ 17 ].

2.2.2. Organic pollutants

Organic pollutants are very wide in variety with a huge range of toxicity. Among the list of organic pollutants that has been of great threat to aquatic organisms, plants, and humans are dyes, plant and animal pharmaceuticals, personal care products wastes as well as petroleum organic pollutants. A group of chemicals referred to as endocrine disruptive chemicals (EDCs) also belongs to the organic pollutants group, which are classed as emerging contaminants. EDCs are described as external agents that interfere with hormonal activities, thus affecting the normal homeostatic reproduction, development or behavior [ 18 ].

Dyes are water soluble giant chemical that is greatly used in many industries viz; textile, leather and tanning, food, paper, etc. to impact color on products. Aquatic organisms, plants, and humans are greatly affected by dyes’ presence in water. They impede sunlight penetration into water bodies and reduce dissolved oxygen, thus leading to death of photosynthetic organism and other lives within the aquatic environment [ 1 ]. Humans may be exposed to dye toxicity via consumption of vegetables and fish which bioaccumulate dyes. The use of colored paper towels used in drying hands and in food preparation is another route of exposure to human [ 19 ]. Dyes are considered as carcinogenic and mutagenic, thus their removal from wastewater before disposal is ultimately important.

Human and veterinary pharmaceuticals, which are members of EDCs, are chemicals used as curative or preventive of various diseases. Veterinary pharmaceutical may also serve the purpose of increasing efficiency of food production. Pharmaceuticals are used widely and unavoidably, thus they enter into the environment through one of these routes indiscriminate disposal of hospital and household waste, landfill leaching, drainage water and sewage. Although pharmaceuticals have been found to exist in various environmental samples at the ng/l to μg/l levels, it is considered a great threat to both aquatic lives and humans [ 20 ]. The presence of pharmaceuticals in water is known to pose both acute and chronic toxicity on aquatic organisms [ 21 , 22 ]. EDCs as their name implies causes abnormal endocrine activities and increase cancer risk in human. Their effects on aquatic lives may range from endocrine system disruption through the reduction in eggs and sperm cells production to feminization of female aquatics [ 23 – 25 ].

2.3. Salvaging the aquatic environment: demands and expectations

Water is one important part of our day to day activities and their preservation can never be overemphasized. Three quarter of the fluid in man is made of water and it forms the essential medium in which the biochemical reactions take place in human body. Water moves blood from one place to the other in the body and helps in digestion; electrically charged ions, which generate nerve signals that make the human brain possible, are also held and transported by water. Water is a good solvent and it is usually referred to as universal solvent; all the major components in cells, that is, protein, deoxyribonucleic acid (DNA) and polysaccharides are all soluble in water. Pure water is tasteless, odorless, and transparent and thus provides a habitat for aquatic plants and organisms because sunlight can reach them within the water. Though clean water is a vital commodity for the well-being of human but unfortunately, the availability of fresh water is unevenly distributed and greatly threatened where available due to problems associated with climate change, inefficient water management and pollution. Recent report says very high percentage of the world population still lacks water for human well-being and ecosystem conservation [ 26 ]. The world is faced with the dilemma of achieving balance between economic development and sustainable natural environment.

Effective wastewater treatment has been earlier identified a way of protecting the water environment with detailed discussion on effective, cheap, and accessible method of wastewater treatment [ 27 ]. Various other methods of water purification such as forward and/or reverse osmosis [ 28 – 31 ], precipitations [ 32 , 33 ], coagulation [ 34 – 36 ], filtrations [ 37 – 39 ] modular anaerobic system [ 40 ], microbial fuel cell [ 41 ], and advanced oxidation process [ 42 ] with their attendant challenges have been reported in literature.

Various environmental policies stipulating discharge protocols exists. These policies are however not effectively executed as the industries consider them as damaging to business. The ability of industries to run with the various environmental discharge policies will sustain our natural environment.

Policy integration, that is, factoring environmental issues of concern into the core of economic development, is highly important to facilitate policy performance. The main actors in environmental issues, that is, the industries, agro firms, and populace, show very little understanding of the impact of their activities on the present and future environment. While organized periodical training concerning environmental sustainability should form part of environmental policy objectives, ensuring that these objectives are integrated into sectors plains and policies is important.

3. Microbial perspective of water pollution and remediation

Drinking water supplied to our communities is usually sourced from rivers, springs, and underground sources. Usually, some form of treatment is carried out to ensure the water is fit for drinking although some sources are somewhat free from contaminating microorganism and can be clean, for example deep well. In many developing countries, one source of water can serve many uses such as drinking, washing, swimming, bathing, etc. In the same vein, sewage can be channeled into water bodies. Sewage can be defined as used water draining out of homes and industries that contain a wide range of debris, chemicals, and microorganisms. Such water is regarded as potential health hazard to consumers or the users of other sort. A major kind of hazard is the presence of pathogenic organisms in such water. This is why water is usually treated in three phases [ 43 , 44 ].

The first is to separate large matter in the water source and the second stage focuses on removing more toxic substances and other matter. The tertiary phase involves total purification of water commonly by chemical disinfection. More recently, membrane bioreactors are being used and have been found to be very efficient in removing contaminants. These are combinations of communities and high-efficiency membranes that are much more effective at removing contaminants. The role of microbes is obvious in the second stage where microorganisms actively carry out biodegradation of organic matter in the aqueous portion produced after the first stage. Biodegradation of materials, such as paper and petroleum, are by bacteria, algae, and protozoa. When water is exposed to air, soil as well as effluents, it gains saprobic microorganisms; it can also pick up pathogens such as Cryptosporidium , Campylobacter , Salmonella , Shigella , etc.

To monitor water for each of these pathogens may not be possible but detection of fecal contamination is an easier way of spotting contamination. In such case, when the fecal contamination is high, pathogens are believed to be present and the water is unsafe for drinking. Hence, indicator organisms are used as tools to detect fecal contamination of water. They usually inhabit the intestine of mammals and birds and can be easily identified using common laboratory procedures. To achieve water protection, it will be almost impossible to search for the pathogens themselves. Hence, certain organisms with specified criteria are used as ‘indicators’ of the presence of enteric pathogens in a water sample. An indicator bacterium should be applicable for analysis of all types of water; it should be found anytime enteric pathogens are present and it should thrive in the wastewater longer than the toughest enteric pathogen. In addition, such organism should not reproduce in the contaminated water because this will give exaggerated values and it should not be harmful to human begins. Other criteria are that the level of contamination should be directly proportional to the level of fecal contamination; assay procedure for the indicator organism should be highly specific and the test procedure should be easily performed.

The following are commonly used as indicators of fecal contamination in water: total coliforms, Escherichia coli , fecal coliforms, fecal streptococci/enterococci, coliphage, and Clostridium perfringens . Coliforms are members of the family Enterobacteriaceae (they include E. coli ). They are facultative anaerobic, Gram-negative, nonsporing, rod-shaped bacteria that ferment lactose with gas formation within 48 hours at 35°C [ 45 ].

Microbial contamination of water can be detected by checking for certain organisms including heterotrophic bacteria, coliforms, and Escherichia coli in such samples. The work by Kora et al . [ 46 ] showed that heterotrophic bacteria were in abundance in the lake water sampled. They also reported that contamination by E. coli and coliforms were beyond the allowable limit; indiscriminate disposal of sewage into water as well as release of human excreta was implicated in the high level of indicator organisms.

Control of pathogens in water is important to prevent waterborne diseases; this can be effectively done using multiple barrier approach. Microbial treatment methods goes further than traditional municipal wastewater treatment, because it takes into consideration the removal of nutrients (e.g., nitrate and phosphate) and easily degradable organic compounds as well as the possible presence of toxic compounds and variations in pH of the wastewater. A more advanced design is required in the bioreactor to be used. Some parameters to be considered in designing a treatment system are biomass yield, nutrient addition, the supply of oxygen or other electron donor, pH control as well as kinetics, that is, biological reaction rates (biotransformation). It is important to note at high concentration many compounds of interest are toxic to bacteria being used for treatment. Also some dissolved organic and inorganic compounds may constitute inhibitors to biodegradation by the organism. Biological treatment processes may not consist of the following—lagoon treatment, activated sludge as well as fixed film bioreactors.

The lagoon treatment is long-detention time basins; but unlike activated sludge processes, they do not use solid recycle. Such treatment scheme may be in three categories: anaerobic lagoon treatment, which makes use of highly loaded lakes creating anaerobic conditions. It has been used successfully for the pretreatment of meat and poultry processing wastewater reducing the biochemical oxygen demand considerably [ 47 ].

In the case of facultative ponds, there is an aerobic surface and an anaerobic bottom. The top aerobic layer facilitates treatment of dissolved organic compounds as well as odourous compounds. This has found application in pulp and paper industries. With regards to aerated lagoons, oxygen is provided by mechanical means or diffused aeration and the solids are continuously mixed and in suspension. Biological oxygen demand (BOD 5 ) removal may range up to 95% [ 48 ].

Another biological treatment process of interest is the activated sludge. It is made up of an aeration basin where aeration equipment provides both oxygen and adequate mixing of wastewater to maintain a uniformly mixed liquor suspended solids (MLSS). The aeration basin is followed by a liquid–solid separation usually in a clarifier by gravity and finally the settled biomass is returned again to the activated sludge basin. Examples of aeration basin configurations are – plug-flow systems, single completely mixed basins, and basins in series. The solid retention time (SRT) is important in this treatment process. The solid retention time is the average time biomass is maintained in a biological treatment process reaction. Generally, SRT control is temperature dependent and for a warmer climate (15–25°C), SRT should be between 4 and 9 days [ 49 ]. The clarifier is very important in the performance of activated sludge processes. It ensures that efficient clarification and thickening of mixed liquor occurs. When the readily degradable soluble biochemical oxygen demand is high in wastewaters, growth of filamentous bacteria is encouraged leading to poor sludge settlement. The use of powdered activated carbon (PAC) has been discovered to enhance the efficiency of activated sludge processes. The PAC functions by adsorbing inhibitory chemicals or adsorbing chemicals that buffer variable loads. The application between 10 and 50 mg/liter of wastewater has been proven to remove organic inhibitors of the process as well as improve nitrification since it absorbs organic compounds that can prevent this process (ammonia-nitrite/nitrate conversion) in autotrophic bacteria [ 50 ].

Apart from the aforementioned, anaerobic bioreactors are also beneficial for the industrial wastewater treatment. This is because it is cost effective and can be used for industrial wastewater with high strength. The processes in the anaerobic bioreactor lead to the production of mainly methane as well as other gases. However, there is a need to strike a balance between fermentation bacterial activity and methanogenic bacteria activity as the latter is slow growing. Advantages of anaerobic treatment include low sludge formation, production of useful product, low nutrient requirement, and more importantly less energy requirements since aeration is not necessary. In addition to the energy production, advantages of anaerobic wastewater treatment, high organic matter removal efficiency, low excess sludge production, and stable operation are characteristics of this wastewater treatment technique [ 51 ].

A most recent advancement in the biological treatment of wastewater is the use of membranes in bioreactors. In such cases, the membrane can serve three major purposes. Firstly, membranes can be used as a surface for the attachment for growth of organisms and to permit oxygen to permeate into the biofilm. An example of this is the hollow-fiber gas-permeable membranes in wastewater treatment. Such membrane is produced from microporous, hydrophobic polypropylene and allows almost 100% oxygen transfer while ensuring high biomass density within the space. The second way membranes can be used as selective barriers. Such membranes permit organic compounds in wastewater to permeate but do not transport ions into the bioreactor. Thus, it allows for the selection of biodegradable organic compounds. An example of a material used for such membrane is silicone rubber. Finally, membranes can be for biomass separation. This third category requires that the membrane be used instead of a clarifier after activated sludge treatment. When such membranes are used, the effluent produced is of high quality and less sludge. In addition, automated processing can be easily employed. The disadvantage however is the financial enormity of the investment for initial start-up as well as maintenance [ 50 , 52 , 53 ].

3.1. Monitoring water distribution systems

Since coliform bacteria are often detected in drinking water and often, the source of contamination is not known, it is important to put in place control measures. The water distribution systems must be considered because water quality deterioration (i.e., negative quality changes that occur from the point of distribution to the point of detection) may occur. This can be as a result of reduced maintenance of the distribution system or from insufficient treatment and may lead to undue microbial growth, which the consumer may not notice. Water distribution systems should be periodically flushed to remove sediments, deposits as well as the growth of microorganisms within the pipe. For areas where the flow rate is low and possibly of the water becoming stale is high, a secondary disinfection using monochloramine and proper maintenance should be carried out in such as to prevent nitrification. Another point is to avoid a break in the distribution system especially during construction, repairs or installations, and cross connections. The officers should also ensure that the level of treatment a water sample is given is in conformity with the quality of the source of water. Also, the sampling for laboratory analysis must also be taken into consideration and monitored thoroughly when aseptic techniques are compromised, detection of coliforms may occur.

Even though reports of water diseases have been low and less serious in most developed countries, it is still a major concern in some underdeveloped countries especially war-ravaged countries. It is however important to operate a multibarrier approach, which will ensure protection of the water source, and also certify adequate treatment and distribution of water. It is however important that every occurrence of coliforms in drinking water be properly investigated so that if the contamination is as a result of operational deficiency, this can be addressed and future occurrence is prevented, thus safe guarding the health of the public [ 54 ].

3.2. Herbal disinfection of water

Several modern methods of water purification have been well embraced in our society today. However, some rural dwellers who may not be able to afford these modern treatment methods still have water pollution as a major challenge [ 55 ]. Furthermore, the disinfection by-products which remain after treatment is another reason why herbal attempts in water treatment should be encouraged.

It is important to note that not many researchers apply their antimicrobial extract or fractions directly in water treatment. Many groups stop at establishing the antimicrobial potential of their study plant, whereas others go further to apply the extracts in water treatment. For instance, a reported work used alcoholic, aqueous, and fresh juice extracts of Ocimum sanctum (tulsi) and Azadirachta indica (neem) and applied them in vitro against salmonella, which was chosen as an indicator organism. The alcoholic extract gave the best result for well water, whereas the aqueous extract was best for lake water [ 56 ]. Similarly, inspired by the fact that tulsi, neem, and amla are used to treat microbial infection without any side effect, another researcher compared the effectiveness of these three herbs in water purification, using percentage of E. coli removal to measure the effectiveness of each herb. A notable observation is the fact that a mixture of 1% concentration of each herb is not as efficient as the synergistic combination of the three [ 57 ].

An indirect application of herbs in water purification is their use in the synthesis of nanoparticles, which are afterwards applied to remove contaminants from water [ 58 ]. These extracts influence the surface properties of the nanoparticles, thus dictating their unique properties Owing to the obvious advantages of natural disinfection, there is a need for more research into natural products for water purification. This will in no small way help rural dwellers to cheaply assess cheap clean water and so live a healthier lifestyle.

4. Water pollution and impact on climate

All organisms, including man need water for their survival. Water resource managers had strongly depended on wastewater treatment in ensuring that the quality of water is sustained, preserved, and maintained for optimal use. By 2025, an estimated around 5 billion people out of a total population of around 8 billion will be living in areas of water stress [ 59 ]. One of the major environmental issues affecting humanity is the increasing worldwide contamination of freshwater systems as a consequence of industrial and chemical compound materials being emptied into their pathways/runways, majorly in form of micro-pollutants. According to Schwarzenbach et al. [ 60 ], most of these pollutants are present at low concentrations, many of them however can raise significant toxicological concerns, more importantly when such compounds are present as constituents of composite blends. Numerous micro-pollutants had been identified in literatures [ 61 – 64 ], which are not vulnerable to current treatment and are subsequently transported to the aquatic environment. Some of these include steroid hormones, pesticides, industrial chemicals, pharmaceuticals, and many other emerging materials. This consequently endangers both the aquatic and human life. It is therefore not surprising that freshwater pollution is a strong public menace, which requires global concern. The next quotation properly situates the environmental risk humans are exposed to:

“It is in the interest of all the world that climatic changes are understood and that the risks of irreversible damage to natural systems, and the threats to the very survival of man, be evaluated and allayed with the greatest urgency” [ 65 ]

The above quotation were the statements of the President of the Republic of the Maldives, His Excellency Maumoon Abdul, Gayoom, during the United Nations General Assembly held in 1987 in the United States of America, as adapted from the (World Health Organization Geneva Report) [ 66 ]. The meeting was centered on Issues of Environment and Development. Due to climate change effect, both the thermal and hydrological phases of rivers are expected to vary. Owning to these, it is necessary to briefly discuss what climate change is as climate change has the potential of imposing additional pressures in some regions of the world.

4.1. What climate change is

In other to get a good grasp of what climate change is, it may be better to first define climate. Climate is usually narrowly defined as the average weather, or broadly, as the statistical description in terms of the average and variability of relevant parameters or quantities of interest over a period of time, ranging from days to millions of years. Most often, the parameters often used are temperature, precipitation, wind, etc. Climate can therefore be generally described as a state, including statistical description, of the climate system.

Climate change, on the other hand, often referred to as global warming, is the rise in the average temperature on the Earth’s surface. It is well believed that the climate change event is as a consequence of human use of fossil fuels, which consequently releases carbon dioxide (CO 2 ) and other greenhouse gases into the air. These gases trap heat within the earth’s atmosphere and can have a variety of effects ranging from rising sea levels to severe weather events. Green et al. [ 67 ] had submitted that global climate change can include natural and anthropogenic influences on terrestrial climate and the hydrologic cycle. Most notable international scientific community had actualized the reality of climate change. Some of these include the National Aeronautics and Space Administration ( NASA ), the National Oceanic and Atmospheric Administration ( NOAA ), and the Environmental Protection Agency ( EPA ) of the United States, to mention a few. These agencies further reiterated that climate change is a menace created from human activity to affect human. Figure 1 adapted from World Health Organization Geneva Report [ 66 ] revealed that all the major activities of global climatic changes eventually bore its consequence on human in general and on human health in particular.

Inter-relationship between various kinds of environmental change. Adapted from WHO Geneva Report [ 66 ].

However, pressures and anxiety on the Earth’s climatic system are having impacts on the surface of the Earth. Apart from the rising surface temperatures, the activities of increasing and frequent flooding and droughts and the changes in our natural water ecosystem are other areas of great concern in the continuous existence of man on Earth. According to WHO Geneva Report [ 66 ], climatic situation and activities affect human well-being both directly and indirectly. The direct influence is through the physical effects of climatic extremes, whereas the indirect means include the influence on the intensities or level of pollution in the air, on the marine and freshwater systems that provide food and water, as well as the pathogens that cause infectious diseases. For the purpose of this section, we concentrate on the climatic activities with respect to water pollution. This will lead us to the next sub-section.

4.2. Probable link between water pollution and climatic impact

“Observational records and climate projections provide abundant evidence that freshwater resources are vulnerable and have the potential to be strongly impacted by climate change, with wide-ranging consequences for human societies and ecosystems”

- Excerpt from the executive summary of the technical paper of the IPCC edited by Bates et al. [ 68 ]

Human activity affects weather, climate, and the environment. While some of human activities are harmless, others damage the environment. While the environment can absorb some abuse without long-term effects, much harmful human activity exceeds the environment’s capacity to recover. Water pollution is one of the inevitable human-induced climate change issues that called for urgent remedial measures. Water pollution will in no small measure affect or alter the basic water quality parameters comprising the micro-pollutants, physiochemical, and biological parameters [ 69 ]. Probable and incessant changes in both rainfall and air temperature has the capacity to affect river flow thereby inducing chemical reaction kinetics as well as drop in the freshwater ecological quality. Associated with such process are dilution of contaminants and water sediment loads, which when ran into lakes will alter its natural features and affect its inhabitants. This form of water pollution or through man-made toxic chemical or/and by-products addition may therefore generate some toxic and greenhouse gases, which may subsequently contribute to global warming activities or more severe environmental threats.

The greenhouse gases are the gaseous constituents of the atmosphere (both natural and anthropogenic), which can absorb and emit radiation at certain wavelengths within the spectrum of thermal infrared radiation emitted by the earth’s surface, the atmosphere itself, and the clouds. The primary greenhouse gases in the Earth’s atmosphere include carbon dioxide ( CO 2 ), nitrous oxide ( N 2 O ), water vapor ( H 2 O ), methane ( CH 4 ), and ozone ( O 3 ). The other ones identified from the Kyoto Protocol include hydrofluorocarbons ( HFCs ), perfluorocarbons ( PFCs ), and sulfur hexafluoride (SF 6 ). Some of these environmental threats include earth’s temperature enhancement (as earlier stated), lowering of atmospheric air quality, and killing of aquatic animals. Consequently, given the legacy of historic greenhouse gas emissions and the prospect of inevitable climate change, one cannot but commit significant financial and technical resources to remediating the effect through rigorous research efforts and sensitization activities [ 70 ], more importantly to water pollution and water-related issues. Thus, water resources managers are continuously and increasingly looking for information on the possible changes in hydrological regimes, which may arise in the next few decades for likeable adaptation measure plan [ 68 ].

An interesting challenge is that while incessant water pollution may bring about a change in climatic conditions through greenhouse effect and activities, the climate too will in turn take its toll effect on the water system and environment (hydrological cycles). This is because the higher temperature generated from the greenhouse effect will eventually turn some part of the snowfall into rainfall, causing an earlier snowmelt season [ 71 ]. These effects will consequently alter the timing and volume of spring flood appreciably. The rise in sea level during this time will then cause saline water intrusion into groundwater aquifers close to the coast thereby reducing the available groundwater resources. This process will in no small measure affect humans as almost about 50% of the world population depends on groundwater for their various activities [ 72 ]. Mitchelle et al. [ 73 ] using physically hydrological and water temperature modeling framework had reported an increase in the seasonality of river discharge for about 35% of the global (consisting of all continents) land coverage for the projected and modeled data for years 2071–2100 when compared with the years spanning 1971–2000. They also projected a rise in temperature—revealing a projected global change into the future. Other effects of climate change on the hydrological cycle include increasing atmospheric water vapor content, changes in soil moisture and runoff, and changing precipitation patterns [ 74 ]. Furthermore, higher temperatures of freshwater and changes in extremes, including floods and droughts can also intensify many forms of water pollution. The authors also showed that water fluctuation in quantity and quality has the potential of affecting food stability and availability—leading to a reduction in food security to vulnerable poor farmers.

4.3. Water pollution remediates measures against climate change

Almost 20% of the entire population of the Earth do not have adequate access to safe water, while about 40% suffer the effects of deplorable sanitary situations [ 75 ]. Schwarzenbach et al. [ 60 ] had submitted that the increase in surface/groundwater pollution will go a long way in affecting both the human and aquatic life systems. According to Schwarzenbach et al. [ 60 ], about 35% of the Earth’s available and renewable freshwater are used for industrial, domestic, and agricultural purposes. However, if this activities are not well managed, water pollution may be inevitable with different kinds of pollutants. Some of the water pollutants according to the authors include industrial chemicals (e.g., solvents and petrochemicals), biocides (e.g., pesticides and nonagricultural biocides), natural chemicals (e.g., heavy metals and cyanotoxins), industrial products (e.g., additives and lubricants), as well as consumer products (e.g., detergents and personal care products). Industrial manufactured nanomaterials had also been found to be a major water pollutant whose effects is on the increase in affecting aquatic ecosystem [ 76 ]. According to Lapworth et al. [ 77 ], groundwater pollution mainly results from landfill leachate, infiltration of contaminated water from agricultural land, groundwater-surface water reaction, as well as seepage of sewer systems. While some of these pollutants, like heavy metals, are not degraded at all, some others disintegrated very slowly and can be transported to hundreds of kilometers away from the source. The effects of their waterborne pollution however ranges from contamination of drinking water causing drinking water quality problems to emission of greenhouse gases, resulting in climatic change challenges.

Some remediate climate change mitigation measures against water pollution can however be taken. Some of these include carbon dioxide capture and storage, planting of bio-energy crops, proper solid waste disposition, afforestation or reforestation, cropland management–both for water and reduced tillage [ 74 ] among other measures. Scientific researches involving water pollution should be geared more toward ascertaining the physical underlying molecular mechanisms and factors rather than just the usual empirical comparison approach that is commonly used. The mechanisms involved if well understood will go a long way in properly situating ways of combating the water pollution challenges. This according to Metz and Ingold [ 62 ] may be achieved by developing a structure that addresses both the problem dimension (causes and effects) and sustainability dimension (long term and cross-sectoral) of assessing best instruments that regulate water pollution. A sustainable working policy on water pollution should not only be designed and enacted but also rigorously followed, more importantly in the developing and underdeveloped countries where the menace of water pollution has not been effectively managed. Bemelmans-Videc [ 78 ] had presented a classification for effectively managing water pollution. These are (i) regulation (i.e., substance ban and authorization restriction) (ii) economic instruments (i.e., product or substance charge—in which case a charge is levied on substances that contains hazardous compounds with the aim of reducing its use), and (iii) information (e.g., disposal requirements and information campaign). These Bemelmans-Videc [ 78 ] classifications according to Metz [ 63 ] would help in differentiating source-directed measures from end-of-pipe measures in water quality regulation. While the source-directed measures help in avoiding pollution before toxic and injurious chemical materials enter into waters, the end-of-pipe measures concentrate on filtering pollution after its input into wastewater.

Furthermore, usage and disposal approaches should be in place with the aim of minimizing the addition of critical pollutants into aquatic environment. In addition, such system-specific properties and reactivities (like adsorption to solid phases and abiotic/biological transformations) should be well understood and quantified. This kind of processes will yield a significant framework for reliable coverage and evaluation of chemical compounds in complex macroscopic ecosystems [ 66 ]. Other alternative methods for removing pollutants from waters include ozonation and advanced oxidation process (AOPs), coagulation-flocculation, membrane bioreactor, PAC , and attached growth treatment processes. Refer to the work of [ 61 ] for comprehensive reading on the methodology and activity of each process. It can therefore be concluded that whatever form of measure taken in inhibiting both surface and groundwater will not only advance our aquatic ecosystem, but will also help man from further endangering his environment from the menace of climate change.

5. Conclusion

Since water forms a core of the existence of human and other living things, its preservation and sustainable availability cannot be overemphasized. The availability of clean water is greatly threatened by various human activities and of interest is pollution which in turn affects the ecosystem and causes various climatic changes. While various wastewater treatment methods are being explored by industries and various treatment plants, untreated wastewater is still being discharged into the water bodies by some industries. Thus, effective environmental protection policies compliance drive will be of immense benefit to the environment and by extension to human. Factoring these environmental protection policies into the goals and objectives of various actors involved in environmental deterioration will help policies performance. This will serve as a step forward in the direction of ameliorating water pollution.

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Discharge from a Chinese fertilizer factory winds its way toward the Yellow River. Like many of the world's rivers, pollution remains an ongoing problem.

Water pollution is a rising global crisis. Here’s what you need to know.

The world's freshwater sources receive contaminants from a wide range of sectors, threatening human and wildlife health.

From big pieces of garbage to invisible chemicals, a wide range of pollutants ends up in our planet's lakes, rivers, streams, groundwater, and eventually the oceans. Water pollution—along with drought, inefficiency, and an exploding population—has contributed to a freshwater crisis , threatening the sources we rely on for drinking water and other critical needs.

Research has revealed that one pollutant in particular is more common in our tap water than anyone had previously thought: PFAS, short for poly and perfluoroalkyl substances. PFAS is used to make everyday items resistant to moisture, heat, and stains; some of these chemicals have such long half-lives that they are known as "the forever chemical."

Safeguarding water supplies is important because even though nearly 70 percent of the world is covered by water, only 2.5 percent of it is fresh. And just one percent of freshwater is easily accessible, with much of it trapped in remote glaciers and snowfields.

Water pollution causes

Water pollution can come from a variety of sources. Pollution can enter water directly, through both legal and illegal discharges from factories, for example, or imperfect water treatment plants. Spills and leaks from oil pipelines or hydraulic fracturing (fracking) operations can degrade water supplies. Wind, storms, and littering—especially of plastic waste —can also send debris into waterways.

Thanks largely to decades of regulation and legal action against big polluters, the main cause of U.S. water quality problems is now " nonpoint source pollution ," when pollutants are carried across or through the ground by rain or melted snow. Such runoff can contain fertilizers, pesticides, and herbicides from farms and homes; oil and toxic chemicals from roads and industry; sediment; bacteria from livestock; pet waste; and other pollutants .

Finally, drinking water pollution can happen via the pipes themselves if the water is not properly treated, as happened in the case of lead contamination in Flint, Michigan , and other towns. Another drinking water contaminant, arsenic , can come from naturally occurring deposits but also from industrial waste.

Freshwater pollution effects

Water pollution can result in human health problems, poisoned wildlife, and long-term ecosystem damage. When agricultural and industrial runoff floods waterways with excess nutrients such as nitrogen and phosphorus, these nutrients often fuel algae blooms that then create dead zones , or low-oxygen areas where fish and other aquatic life can no longer thrive.

Algae blooms can create health and economic effects for humans, causing rashes and other ailments, while eroding tourism revenue for popular lake destinations thanks to their unpleasant looks and odors. High levels of nitrates in water from nutrient pollution can also be particularly harmful to infants , interfering with their ability to deliver oxygen to tissues and potentially causing " blue baby syndrome ." The United Nations Food and Agriculture Organization estimates that 38 percent of the European Union's water bodies are under pressure from agricultural pollution.

Globally, unsanitary water supplies also exact a health toll in the form of disease. At least 2 billion people drink water from sources contaminated by feces, according to the World Health Organization , and that water may transmit dangerous diseases such as cholera and typhoid.

Freshwater pollution solutions

In many countries, regulations have restricted industry and agricultural operations from pouring pollutants into lakes, streams, and rivers, while treatment plants make our drinking water safe to consume. Researchers are working on a variety of other ways to prevent and clean up pollution. National Geographic grantee Africa Flores , for example, has created an artificial intelligence algorithm to better predict when algae blooms will happen. A number of scientists are looking at ways to reduce and cleanup plastic pollution .

There have been setbacks, however. Regulation of pollutants is subject to changing political winds, as has been the case in the United States with the loosening of environmental protections that prevented landowners from polluting the country’s waterways.

Anyone can help protect watersheds by disposing of motor oil, paints, and other toxic products properly , keeping them off pavement and out of the drain. Be careful about what you flush or pour down the sink, as it may find its way into the water. The U.S. Environmental Protection Agency recommends using phosphate-free detergents and washing your car at a commercial car wash, which is required to properly dispose of wastewater. Green roofs and rain gardens can be another way for people in built environments to help restore some of the natural filtering that forests and plants usually provide.

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Related topics.

• WATER POLLUTION
• ENVIRONMENT AND CONSERVATION
• FRESH WATER
• GROUNDWATER
• WATER QUALITY
• WATER RESOURCES

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Water Pollution in the US: Causes and Control Essay

Introduction: water pollution in the united states.

The issue of water scarcity and to following strategy for its sustainable use is quite tricky. While technically being a renewable resource, water should not be viewed as the one that can replenish itself, either – due to the dangerously high rates of water pollution, the existing amounts of freshwater are getting increasingly low.

Although water pollution can hardly be ceased entirely, the current rates of water pollution can be reduced by resorting to the sustainable principle of water use in both the industrial area and the realm of the household. By increasing awareness among the population and developing a sustainable approach towards the usage of the existing water resources, one will be capable of addressing the water pollution rates in the USA.

Discussion: Causes of Water Pollution and the Means of Reducing It

Key causes: the dirty side of water use.

Unfortunately, there is no single negative factor that contributes to the increase in water pollution rates, and there is no malefactor, either – instead, it is the inconsiderate use of the existing resources that triggers water pollution. Among the key factors that trigger water pollution, its industrial usage seems to be the reason for concern for the most part. However, it is the urban runoff (i.e., the abuse of water resources by the residents of the urban areas) that triggers the so-called nonpoint (i.e., irreversible) source pollution.

Along with nutrients and chemicals pollution, the contamination by sewage discharges is an especially huge threat to the American resources of clean water.

Industrial waste

While having to comply with the existing regulations regarding environmental protection, a range of companies resort to unclean practices by dumping their waste into the areas, where the waste becomes a threat to water. The recent Exxon scandal has shown that the estimated $8.9 billion of environmental damages has been made in 2015 (THE EDITORIAL BOARD, 2015).

Underground storage leakages

Underground storage tanks, which traditionally contain petroleum and other harmful substances, often tend to leak, therefore, triggering the release of petrol and the related substances into water, hence the water pollution.

Septic tanks

Contributing to underground storage leaking (), septic tanks contribute to water pollution in the U.S. significantly by discharging around 2 sq. m of waste into the water daily (BELIN, 2015).

Ocean dumping

Another essential factor that defines the rates of water pollution in the USA, ocean dumping needs to be reduced significantly.

Oil pollution

The notorious case of Exxon’s oil spill in 2015 (THE EDITORIAL BOARD, 2015) has shown that oil pollution must be prevented at all costs. The 2013 oil pollution issues have caused the USA 125 miles of coast, affecting the water and the wildlife in the vicinity (Oil spills and disasters, 2014).

Radioactive waste

Much like ocean dumping, radioactive waste disposal is difficult to trace and, therefore, it is easier for organizations dealing with the substances in question to dispose of them improperly.

Fossil fuels burning

Emitting around 117,000, 164,000 and 208,000 billion Btu annually (Comparison against other fossil fuels, 2015), natural gas, oil and coal correspondingly pose a serious threat to the quality of water in the United States.

Landfill leakage

The problem of land pollution and the following contamination of groundwater is a major problem for the United States. According to the 2015 statistics, 56% of trash in the USA is transported to landfills (BRADFORD, 2010). The leakage from the latter, in its turn, poisons the groundwater in the vicinity with detritus from rotten food and the pollutants from plastic items decomposition (BRADFORD, 2010).

Animal waste

Animal droppings also decompose into the elements that, when introduced to the soil, penetrate the groundwater area and, therefore, pollute the water.

Atmospheric deposition

The destruction of atmosphere layers leads to the exposition of water resources to an extreme level of radiation and, therefore, triggers their untimely desiccation.

Global warming

One of the most notorious and, nevertheless, the one of the lengthiest effect, global warming causes the U.S. rivers to overflow; as a result, the sewage contents will pour into clean water, contaminating it. 1.2 trillion gallons of sewage contaminate freshwater annually in the U.S (Water pollution facts, n. d., para. 24).

Death of aquatic animals

Global warming triggers a steady rise in the temperature of the water, thus, causing deaths of numerous aquatic organisms. The decomposition elements of the latter pollute the waters of the Atlantic Ocean coast and the American rivers.

By introducing wastewater to rivers and oceans, the authorities of the U.S. risk the contamination of the aquatic animals and, therefore, the transfer of pollution by the sick animals to the clean water areas.

Food chains disruption

The effects of wastewater and food chains disruption are, in fact, reciprocal, as the latter trigger an increase in the death toll among the water life forms and, therefore, cause the contamination of water with the decomposition products, the algae, which are no longer consumed by the deceased aquatic animals, etc.

Ecosystems destruction

As a result of the lack of proper food, the inhabitants of the American rivers and seas, as well as the Atlantic, the Pacific and the Arctic Oceans are likely to die out. The lack of certain elements of the ocean food chain, in its turn, will result in higher death tolls among the aquatic animals and, thus, higher decomposition rates.

Reaching the point of no return

Agriculture.

To facilitate proper growth of crops, American farmers and farming organizations spend water resources unreasonably. 130 billion gallons being used for irrigation and livestock (ADMIN, 2011), agriculture is the leading cause of water scarcity in some of the regions of the USA.

Municipal point sources

Leading to a significant reduction of dissolved oxygen, MPS also drastically affect the cleanness of water in the U.S.

Urban runoff

Made of impervious materials, pavement does not allow snow and rain to trickle into the ground; as a result, the hydrological water cycle is disrupted.

Stream/habitat changes

Another factor that causes numerous water creatures to die or migrate, stream and habitat changes alter essential characteristics of the environment, thus, causing water to become filled with bacteria, algae, etc.

Means of Control: Starting with Personal Responsibility

Reasonable use of water.

Sustainability as the basis towards the use of water resources can be viewed as the strategy that should make the basis for the proper use of water. The specified approach must be deployed at every level of water resources distribution from municipal to agricultural.

Pollution Prevention Act

Adopted in 1990, the Act creates the premises for “reducing the amount of pollution through cost-effective changes in production, operation, and raw materials use” (Summary of the Pollution Prevention Act, 1990, par. 1).

Raising awareness among the citizen

Apart from designing legal ramifications, state authorities should consider the idea of influencing people on a personal level. By promoting the responsible use of resources, one will be capable of reducing water waste rates significantly.

Reducing the number of solids

Solid waste reduction is likely to postpone the process of water supplies exhaustion.

EPA laws enhancement

Although the approaches suggested by EPA are generally reasonable, they seem to have been disregarded when defining the strategies for water resources use in the USA. Thus, there is a need to facilitate compliance with EPA laws. This can be done by imposing fines on the individuals and organizations abusing water resources.

Ocean Dumping Program

The program was designed in 2014 after the Marine Protection, Research, and Sanctuaries Act (Research project description, 2014) and requires sustainable and responsible disposal of waste.

Oil Pollution Prevention regulation

Designed for addressing the issues such as the case of Exxon and, therefore, preventing the catastrophes related to oil spills, the specified act requires that specific standards for oil tanks design and the storage of oil therein should be complied with.

Solutions to be designed: radioactive waste and direct injection

Even though there is no solution to handling the issue of radioactive waste management, as well as the process of direct injection, measures must be taken to facilitate remoteness of the specified types of waste from any life forms and sources of water.

Abandoning the use of landfills

Although there is no alternative to landfill use for waste management at present, a more appropriate location of landfills can be considered a possibility. Specifically, the regions, where groundwater flows are generally very low, can be viewed as an option (BRADFORD 2010).

Animal waste collection

While the process of collecting animal waste may be rather complicated due to the difficulties related to tracing the locations of stray animals, making people take proper care of their pets and picking up the droppings left by the latter can be carried out comparatively easily by issuing the corresponding laws.

Global warming prevention

A very complex and difficult task, it involves a variety of measures starting from the sustainable use of resources to the transfer to driving hybrid vehicles and refrain from usage of a variety of pollutants including aerosols.

Marine sustainability

Introducing a set of more rigid regulations regarding the waste disposal for businesses along with the development of marine sustainability principles may help in not only preventing water pollution but also addressing the negative effects that it has caused.

The U.S. authorities have adopted a range of programs aimed at water sanitation, including the USAID’s Water and Development Strategy (USAID, 2013).

Sustainable use of resources

The introduction of individuals and organizations to a reasonable usage of water has recently been viewed as an opportunity in the United States.

Sustaining ecosystems: green infrastructure

Likewise, the key principles of sustainability should be adopted when allowing the key ecosystems to retain their

Addressing nonpoint source pollution

Clean water act.

Another suggestion for reconsidering the current rates of water usage, the CWA presupposes that the “basic structure for regulating discharges of pollutants into the waters of the United States” (Summary of the Clean Water Act, 2015) should be established and that similar regulations should be provided for the use of freshwater in the USA.

NPDES Permit Program

A program aimed at regulating the current use of water, it regulates the sources, which discharge pollutants into the ocean (NPDES Stormwater Permit Program, 2015).

Wastewater programs

The phenomenon of wastewater harvesting () has been created for the sake of reducing urban runoff and may have a significant effect on sustainable water use once the awareness regarding the subject matter is increased. Even a more adequate use of water by the residents of the area can be facilitated with the introduction of similar programs. The refusal to use impervious pavement materials for sidewalks and driveways should also be viewed as an option (Urban nonpoint source fact sheet, 2003).

Total maximum daily loads

Seeing that no alternative to waste disposal for major companies have been designed yet, the organizations that dump waste into the ocean have to comply with the existing restrictions on the amount of waste that they can deposit. Unfortunately, not all states follow the requirements set by the TMDL Act (see Appendix A).

Watershed management

Likewise, the watershed management approach, which presupposes that careful studies of the watershed should be carried out with the following location of the problem areas and the measurers designed for addressing the emerging issues in a manner as timely and efficient as possible. There is no secret that watershed management presupposes dealing with not only the issue of water pollution but also the problem of habitat destruction. In other words, watershed management programs adopted in the USA currently allow for handling several issues simultaneously and, therefore, promoting a more sustainable approach towards the consumption and usage of the existing water resource.

Green infrastructure

The aforementioned sustainability issue can be attained through a series of actions that are determined for enhancing habitat recovery. Indeed, as it has been stressed above, the lack of sustainability in the management of the water resources in the USA triggers an immediate decay of the existing variability in American nature. As a result, a range of species faces the threat of extinction, therefore, triggering the overpopulation of water with smaller animals and algae (i.e., the elements that used to be the food of the extinct species). Thus, by restoring the habitats that have been destroyed, the American community will be capable of replenishing water resources or, at the very least, saving the ones that they still have at their disposal.

National Water Quality Initiative

Though having started their activity comparatively recently, the proponents of the NWQI movement have already designated “approximately five percent of EQIP financial assistance to targeted agricultural conservation practice implementation in 165 HUC 12 NWQI watersheds” (Session M5: quantifying agricultural nonpoint sources and controls, 2013, p. 2).

Fostering personal responsibility

Last, but not least, the idea of promoting personal responsibility as the basis for sustainable water use must be viewed as an option.

Conclusion: Spring Cleaning on a Global Scale

Although water is traditionally viewed as a renewable resource, the nonpoint pollution factors in the United States make the threat of water scarcity dangerously high. Therefore, a more sustainable approach towards the use of water not only industrial but also household levels must be introduced into the framework of the U.S. water usage.

Reference List

ADMIN, 2011. US farming and irrigation water usage statistics . Sea Metrics , Web.

BELIN, F. 2015. EPP2 Water Discharge Consent, exemption, Permit, legislation for Septic Tanks and off-mains systems . Biorock , Web.

BRADFORD, A. 2010. Pollution facts & types of pollution . Live Science , Web.

Comparison against other fossil fuels , 2015. Swarthmore College . Web.

National summary of impaired waters and TMDL information , 2015. States Environmental Protection Agency. Web.

NPDES Stormwater Permit Program, 2015. United States Environmental Protection Agency . Web.

Oil spills and disasters , 2014. Infoplease. Web.

Research project description, 2014. Oak Ridge Institute for Science and Education . Web.

Session M5: quantifying agricultural nonpoint sources and controls, 2013. Advisory Committee on Water Information. Web.

Summary of the Pollution Prevention Act , 1990. United States Environmental Protection Agency . Web.

THE EDITORIAL BOARD, 2015. Gov. Christie’s bad deal with Exxon . New York Times , p. 1. Web.

Urban nonpoint source fact sheet, 2003. United States Environmental Protection Agency. Web.

USAID, 2013. Water and development strategy. USAID , pp. 1–33, Web.

Water pollution facts, n. d. Conserve energy , p. 1 Web.

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Essay on Water Pollution : Causes, Effects & Solutions

February 2, 2021 by Study Mentor Leave a Comment

Water is one of the most important factors essential for sustaining life. Every organism, no matter how big or small, requires water to live.

You must’ve noticed that water quality has undergone a sea change over the years. The water has gotten harder and harder.

The color of water in rivers and lakes has significantly changed. The crystal clear surface on water bodies was a thing of the past and we no longer get to see a picturesque image of a clean and perfect water body anymore.

The tap water we receive can no longer be used for drinking, and we are forced to buy separate drinking water, install water purifying devices in our homes.

Have you wondered why we are forced to go in for such applications at our homes. There is no answer for water scarcity in big cities today and people are forced to live with the bitter truth.

Table of Contents

What is water pollution?

Water pollution is nothing but contamination of water bodies with chemicals, toxins and effluents let out from industrial establishments and factories.

These toxins contain harmful concentrations of lead, Sulphur, heavy metals and detergents in them.

Not just that, water bodies are mixed with sewage water and one can imagine the extent of dirt and filth that is contained in the waters of river bodies, thus making them highly polluted.

Pollution is tainting or forcefully mixing harmful and toxic substances into environment. These substances that endanger the consistency and integrity of the environment are called Pollutants.

Pollutants have been ever rampant since man entered the industrial ages.

The environment has been enduring the abuse we afflicted on it since ages. Industries, factories, etc. contribute to pollution on a large scale.

The daily activities that we perform, also pollute the earth due to inefficiency of the methods we use. Alarming quantities of pollutants are being produced and released.

Causes of water pollution

Speaking about water, most of the industries and factories have leftover chemical effluents. They release these residual products into primary water sources like rivers streams, lakes, fresh water tanks etc.

These residues may be a mixture of a myriad of chemically toxic substances.

The microbes present in the natural sources of water have the ability to purify the water to some extent. But the problem arises when we dump more Pollutants before the current batch of water is purified.

Purified, in this context, means oxidizing the water.

Microbes present in water have the natural ability to oxidize it. But constant human intended interference has almost nullified that ability.

In short, pollutants just overtake the good microbial activity and instead cause damage to water sources by inducing them  with filth and dirt.

The activities of the microbes in cleaning up the water reduce to a low minimum or may not take place at all. Waste water from domestic sources is also often dumped into rivers. This pollutes the entire source.

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Effects of water pollution

Water pollution affects us on a daily basis. The cases of water borne disease are on the rise. Since water is one of the building blocks of life, we have but no choice to consume the same water in adequacy.

The dangers of polluted water increases when people unknowingly use polluted water for daily purposes.

This mostly occurs in rural areas, where rivers are a prime source of water.

Factories set up near river bodies may be releasing effluents and people downstream maybe using the same water for drinking purposes and for other daily activities.

It is common knowledge that 70 percent of the earth is covered by water. But not all of this water can be used for drinking and household purposes.

Only a small percentage is fresh water, and most of the other share in the percentage finds itself frozen at the Poles.

The advent of pollution has further reduced the potable water resources. Water available today is way more polluted than it was ages ago.

Our quality of life is greatly affected by this. Use of polluted water causes diseases and ailments. It can be directly linked to the receding length of our lifespan.

Solutions for water pollution

Humans have realized that they have greatly affected the environment in a bad way. Everywhere, efforts are being made to conserve water.

Water treatment plants are setup everywhere. Every waste disposal station has a water treatment department, so that all the chemical and other harmful substances can be removed from water before it is let into the main source.

This has been pivotal in controlling pollution of water. Rules and regulations have been made stringent for factories and industries, regarding their effluent emission, both through the air and through water.

Domestic waste disposal techniques have been improved and proper steps taken in the right direction.

It is entirely up to us, what we decide to do, with our water sources. Global warming is becoming an ever gaping issue and a worldwide concern. There’s always fear of the rains being more infrequent and unseasonal.

What on earth do we do without adequate water. The hardships we’d have to face to obtain enough water for sustaining looks so terrible if we were to quest for a suitable answer.

The everyday tasks that we do would become incredibly difficult. We need to take measures ourselves, to save water and keep it from being polluted.

We must start conserving water in our homes. Only then will the next generation have even the slightest hope for a well-rounded future.

Water pollution is actually a two-fold issue raising global concerns today.

The first issue, the most common one as we know is of the contamination of water by toxins and measures to reduce the contamination and improve the quality of water.

The second one is more serious and pertains to the availability of potable water on earth after some years, putting a question mark on the survival of life on earth itself.

We talk about beautifying our lakes, restoring the cleanliness of our water bodies, removing their contaminants and making them toxic free.

Yes, this is definitely required at the moment and there have been measures taken in the right direction to make our rivers clean and clear.

Specific installations of dust collector and dirt remover equipment’s in river basins have been employed to collect waste material from river surfaces.

This is primarily to remove hard traces of waste or what we can call as visible wastes. This also takes removes unnecessary growth of phytoplankton in rivers, thus letting the river waters breathe at ease.

Regarding toxin removal from river waters, purification using reverse osmosis methods, chemical filtration methods and other treatments using distillation methods are employed to make them free from chemical residues.

Much other advancement have been achieved and successfully employed in the river basins of our country to restore the natural beauty of lakes and rivers.

The best example of river water cleaning in our country is the cleanliness drive carried out at river Ganga in the holy city of Varanasi.

The government of India took it up as a big challenge to clean the river waters at the region and was successful in achieving its mission.

It is only with citizen co-operation and participation that any reformative measures taken by the governments will prove fruitful and worthy of action.

We blame successive governments for not cleaning up our river beds, for not providing us clean drinking water, for not beautifying our lakes etc.

In the melee, we forget our own responsibilities of acting with care and concern.

If we visit rural areas and spot women washing their clothes, utensils and cattle in river waters, it is our duty to educate them and spread awareness about their wrong acts.

We ought to tell them that they aren’t supposed to pollute the river water.

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Essay on Water Pollution for Students and Children

500+ words essay on water pollution.

Water is the most important resource for survival on a planet. It is the essence of life on our planet – Earth. Yet if you ever see a river or lake around your city, it would be evident to you that we are facing a very serious problem of Water pollution. Let us educate ourselves about water and water pollution . Two-thirds of the Earth’s surface is covered by water , seventy-six perfect of your body is made up of water.

Water and Water Cycle

As you already know water is everywhere and all around.  However, we have a fixed amount of water on earth. It just changes its states and goes through a cyclic order, known as the Water Cycle. The water cycle is a natural process that is continuous in nature. It is the pattern in which the water from oceans, seas, lakes, etc gets evaporated and turns to vapor. After which it goes through the process of condensation, and finally precipitation when it falls back to earth as rain or snow.

What is Water Pollution?

Water pollution is the contamination of water bodies (like oceans, seas, lakes, rivers, aquifers, and groundwater) usually caused due to human activities. Water pollution is any change, minor or major in the physical, chemical or biological properties of water that eventually leads to a detrimental consequence of any living organism . Drinking water, called Potable Water, is considered safe enough for human and animal consumption.

Sources of Water Pollution

• Domestic Waste
• Industrial effluents
• Insecticides and pesticides
• Detergents and Fertilizers

Some of the water pollutions are caused by direct Sources, such as factories, waste management facilities, refineries, etc, that directly releases waste and dangerous by-products into the nearest water source without treating them. Indirect sources include pollutants that infuse in the water bodies via groundwater or soil or via the atmosphere through acidic rain.

Get the huge list of more than 500 Essay Topics and Ideas

Effects of Pollution of Water

The effects of Water Pollution are:

Diseases: In humans, drinking or consuming polluted water in any way has many disastrous effects on our health. It causes typhoid, cholera, hepatitis and various other diseases.

Eradication of Ecosystem: Ecosystem is extremely dynamic and responds to even small changes in the environment. Increasing water pollution can cause an entire ecosystem to collapse if left unchecked.

Eutrophication: Chemicals accumulation and infusion in a water body, encourages the growth of algae. The algae form a layer on top of the pond or lake. Bacteria feed on this algae and this event decreases the amount of oxygen in the water body, severely affecting the aquatic life there

Effects of the food chain: Turmoil in food chain happens when the aquatic animals (fish, prawns, seahorse, etc) consume the toxins and pollutants in the water,  and then the humans consume them.

Prevention of Water Pollution

The best way to prevent large-scale water pollution is to try and reduce its harmful effects. There are numerous small changes we can make to protect ourselves from a future where water is scarce.

Conserve Water: Conserving water should be our first aim. Water wastage is a major problem globally and we are only now waking up to the issue. Simple small changes made domestically will make a huge difference.

Treatment of sewage: Treating waste products before disposing of it in water bodies helps reduce water pollution on a large scale. Agriculture or other industries can reuse this wastewater by reducing its toxic contents.

Use of environment-friendly products: By using soluble products that do not go on to become pollutants, we can reduce the amount of water pollution caused by a household.

Life is ultimately about choices and so is water pollution. We cannot live with sewage-strewn beaches, contaminated rivers , and fish that are poisonous to drink and eat. To avoid these scenarios,  we can work together to keep the environment clean so the water bodies, plants, animals, and people who depend on it remain healthy. We can take individual or teamed action to help reduce water pollution. As an example, by using environmentally friendly detergents, not pouring oil down the drains, reducing the usage of pesticides, and so on. We can take community action too to keep our rivers and seas cleaner. And we can take action as countries and continents to pass laws against water pollution. Working together, we can make water pollution less of a problem—and the world a better place.

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Environmental Protection Agency Gives $20 Billion in ‘Green Bank’ Grants

The E.P.A. said the fund will spur a clean energy transition in overlooked communities. Republicans called it a “greendoggle.”

By Lisa Friedman

When Marcus Jones and his business partner, Akunna Olumba, set out to open a pizzeria in Detroit, they spoke with banks about their green vision: solar panels on the roof, an energy-efficient tankless water heater and a rooftop system to capture storm water.

“The lenders thought we were crazy,” Mr. Jones said. Traditional banks were skeptical that such investments would yield a return, and few had ever issued loans for clean energy or efficiency measures. They told the restaurateurs that it simply was not done.

Instead, the pair connected with a so-called green bank, one of a growing number of entities that lend money to businesses and individuals for equipment or technology that reduces the pollution driving climate change.

The movement will get a $20 billion infusion from the Biden administration on Thursday in what Vice President Kamala Harris calls “the largest investment in financing for community-based climate projects in our nation’s history.”

The Environmental Protection Agency plans to award grants ranging from $500 million to $6.9 billion to eight nonprofits. The organizations will in turn use the money to offer loans to businesses, homeowners and others to spur clean energy across the country, particularly in low-income neighborhoods.

Loans could be for something as small as helping one family purchase an electric induction stove or as ambitious as helping to build energy-efficient low-income housing.

“We’re putting an unprecedented $20 billion to work in communities that for too long have been shut out of resources to lower costs and benefit from clean technology solutions,” Michael S. Regan, the administrator of the E.P.A., said in a statement.

Republicans, however, have slammed the money as a “greendoggle” and said that the E.P.A. is not prepared to oversee such a large program. House Republicans passed a bill in March that would repeal the greenhouse gas reduction program.

President Biden threatened to veto the measure if it were to reach his desk, and it has not come for a vote in the Senate. Representative Gary Palmer, the Alabama congressman who wrote the bill, called the E.P.A. initiative a “Green New Deal slush fund” that “raises many concerns about lack of accountability and oversight.”

The Biden administration is working to quickly distribute money from the program before January 2025, when a future administration or a Republican-controlled Congress could eliminate the funds.

The administration estimated the program would attract about $150 billion in private capital, or about $7 for every federal dollar spent. The awardees have committed to collectively cut or avoid up to 40 million metric tons of carbon dioxide emissions in the next seven years. That would be the equivalent of taking about 9.5 million cars off the road for a year.

Mr. Regan said the new network of clean energy financing would “unleash tens of thousands of clean technology projects like putting solar on small businesses, electrifying affordable housing, providing EV loans for young families, and countless others.”

The $20 billion comes from the 2022 Inflation Reduction Act, President Biden’s signature climate law, which included $27 billion for a program known as the Greenhouse Gas Reduction Fund.

The biggest grants under the program include $6.97 billion to a coalition called Climate United Fund, which is led by Calvert Impact, a nonprofit investment firm. The Coalition for Green Capital, a nonprofit founded by Reed Hundt, a former chairman of the Federal Communications Commission, was awarded $5 billion. Power Forward America, which is made up of five climate and housing organizations, was awarded $2 billion.

The idea for the Greenhouse Gas Reduction Fund goes back more than two decades, when a group of financiers proposed the idea of a national bank that could attract private investment by pumping public money into things like electric vehicle charging station networks, community solar projects and other renewable energy adoption.

The E.P.A. program is similar to that concept, but instead of one national bank, the agency is funding the different nonprofit groups, which will act as lenders.

“This has been a long road to get here,” said Senator Chris Van Hollen, Democrat of Maryland, who introduced legislation in 2009 to create a green bank.

Mr. Van Hollen said he expects the funding will make a significant difference in low-income communities where residents may be less likely to take advantage of federal tax incentives that are available for electric vehicles or certain home appliances, like induction stoves and heat pumps, because they lack the upfront cash to make the purchase.

“We don’t want any community to be left behind in the transition to the clean energy economy,” he said.

One grant recipient, Rewiring America, currently does work in communities like De Soto, Ga., a rural area where it has made loans and awarded grants to help about 78 families upgrade appliances and weatherize homes.

Mildred Carter, 73, said when the water heater in her De Soto home gave out last year she thought, “Oh my God, not this now on top of everything else, I can’t afford a new water heater.” Retired after 21 years working at Walmart, Ms. Carter said she went without hot water for two months before she found Rewiring America and applied for a grant for a free electric heat pump and installation.

Ms. Carter said she is concerned about clean energy and climate change. But when it came to her heat pump, she said, “At the time I didn’t care, I just wanted to make sure I had hot water.”

In Detroit, Mr. Jones and Ms. Olumba’s restaurant, Detroit Pizza Bar, has been open for two years and is the first Black-owned pizzeria in the city’s Livernois Six-Mile area. It also is the first sit-down restaurant in the area in more than three decades.

Mr. Jones said the money he borrowed from Michigan Saves, a nonprofit, to purchase solar panels and energy efficiency measures has more than paid off. He said his customers only notice the solar panels and rooftop rain barrels when he points them out. “They’re coming for pizza,” he said.

Vice President Harris and Mr. Regan were expected to announce the awards in Charlotte, N.C.

Lisa Friedman is a Times reporter who writes about how governments are addressing climate change and the effects of those policies on communities. More about Lisa Friedman

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Home — Essay Samples — Environment — Water Pollution — Pollution of Water: Causes, Effects, and Solutions

Pollution of Water: Causes, Effects, and Solutions

• Categories: Pollution Water Pollution

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Words: 700 |

Published: Sep 7, 2023

Words: 700 | Pages: 2 | 4 min read

Table of contents

Causes of water pollution, effects of water pollution, solutions to water pollution, community-based interventions.

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