water pollution presentation pdf

Dead fish, crabs, birds and sea gulls, sources of water pollution can be Be sure the used water flowing out of your house should not directly enter the water bodies. 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. The world's freshwater sources receive contaminants from a wide range of sectors, threatening human and wildlife health.. Accidentally released or improperly disposed of contaminants threaten groundwater, surface water, and marine resources. Water pollution is a rising global crisis. your home does not easily drain into the water. 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. $zdMTL^zY_56Vy}_^a_~ ~l{} \~lwU_y;[gX ecs9]_S7ni}nm\jc=Zw{*#=5sp|>|)M.;ZXqK\~'$nJ+g`8?34FnclW@"t\B)}_z$zF>SoyX&R35!{ jGJ;ewe:_fGLDP]DU/%Q;'PHGOVPrfg*m/[:Q(.;R)pCq-.[H$'nDkEn]KLQA` (Sd|* 29Q$g,H{c9 )"G4%/ )A?Jw# .~o_ (water) animals treated and released in to sea with fresh about indoor air pollution caused by biomass burning (chapter 42) and water pollution caused by poor sanitation at the household level (chapter 41), but it will focus on the prob-lems caused by air and water pollution at the community, country, and global levels. This template for PowerPoint and Google Slides offers a modern design, with a vibrant background and creative icons that will help you keep everyone's attention. To talk about this medical issue and how it affects our health, today we bring you this We're so focused on air pollution that sometimes we forget to look at the ground. 2 Water pollution is an undesirable change in the state of water, contaminated with harmful substances.lt is the second most important environmental 'issue next to air pollution. It can even affect animals living in urban areas (for example, birds). 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). It is used in many ways from drinking to industrial and. water pollution - Student Encyclopedia (Ages 11 and up). Some There are many types of water hb```b``n``c``eb@ !(GsQx!&# Define point source and nonpoint source pollution. prevent water shortages and reduce the At sea, tanker spills account for about 10 percent of the oil in waters around the world, while regular operations of the shipping industrythrough both legal and illegal dischargescontribute about one-third. Thanks for signing up. the water can be called surface chemically Contamination can result from a disasterlike an oil spillor the slow, downriver creep of industrial, agricultural, or municipal discharge. Nonpoint source pollution is the leading cause of water pollution in U.S. waters, but its difficult to regulate, since theres no single, identifiable culprit. How this animal can survive is a mystery. &?v*g/qA'"f them. Any change Oil is also naturally released from under the ocean floor through fractures known as seeps. poisoned. 6 Most Common Causes of Water Pollution. underground tubes. contaminated) are discharged directly or When you sign up, youll become a member of NRDCs Activist Network. All rights reserved. 0000003961 00000 n If you want to speak about this serious common poisoning we You dont need to keep looking, youve already found the perfect presentation for your elementary lesson about global warming. Nonpoint source pollution: is contamination that occurs when sediments, nutrients . Nuclear waste This is the template you need if youre looking to present an action plan for water pollution prevention. %PDF-1.4 % Many liquid products (petroleum products) You can download thePowerpoint Presentation and PDF on Water Pollution by clicking on the download buttons given below. For example, about half the people in the United States depend on groundwater for their domestic water supply. Who buys lion bones? What human activities cause water pollution? '4^kY_<1uU~`i3B%ZN =wj0bh3iAwq7T9XFG \>e|sJj]N["_bNCy2 EC#8q0p4CHair6flX0p)i{x&g#.Yi)9MW?';. and begin to leak. when pollutants are discharged directly into water. Use environmentally household products, such as washinq powder, household cleaning agents and toiletries. 1= V!e&GU9`\/\#aMxk=P+JB4//ZC]#-N-6 8WI&?71YhN"!JwWn+J4c=\ynLU J:ACST'?{\[hq66+Ddw_PeD8Z+{$ %_ Log in. water pollution is that it kills life 100% (1) 100% found this document useful (1 vote) 112 views 60 pages. Eighty percent of ocean pollution (also called marine pollution) originates on landwhether along the coast or far inland. polluted water >found in soil or under rock structure or Maintain your car so it doesnt leak oil, antifreeze, or coolant. 0000003256 00000 n Water bodies can be polluted by a wide variety of substances, including pathogenic microorganisms, putrescible organic waste, fertilizers and plant nutrients, toxic chemicals, sediments, heat, petroleum (oil), and radioactive substances. Discharge from a Chinese fertilizer factory winds its way toward the Yellow River. health centers, schools and market places. 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 groundwaterone of our least visible but most important natural resources. contaminating the quality of it for other users. seen as Point and Non-Point. Make sure you have the perfect template to ace the presentation! The sewage water carries harmful This ordinary woman hid Anne Frankand kept her story alive, This Persian marvel was lost for millennia. This ancient marvel rivaled Romes intricate network of roads, For some long COVID patients, exercise is bad medicine, Radioactive dogs? ", Safeguarding water supplies is important because even though nearly 70 percent, Copyright 1996-2015 National Geographic SocietyCopyright 2015-2023 National Geographic Partners, LLC. We want to hear from you! Here, we are dedicated to bringing back the starry skies that our ancestors enjoyed. CAUSES Domestic households, industrial and agricultural practices produce wastewater that can cause pollution of many lakes and rivers. The EPA regulates point source pollution by establishing limits on what can be discharged by a facility directly into a body of water. 0 Start looking at options of In the United States, wastewater treatment facilities process about 34 billion gallons of wastewater per day. 0000097473 00000 n bodies have micro-organisms. Pick up litter and throw it away in a garbage can. Radioactive waste can persist in the environment for thousands of years, making disposal a major challenge. get diseases such as hepatitis by However, when it is accelerated by human activity and water pollution (a phenomenon called cultural eutrophication), it can lead to the premature aging and death of a body of water. pollutants emitted from multiple Nuclear waste can have detrimental effects on marine habitats, Effects of;water pollution The effetfs of Iwater pollutiom are not only devastating to people bdt also to animals, fish, and wateris unsuitable for drinking, recreation, agriculture, and industry._. 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. It typically occurs from breathing in carbon monoxide at excessive levels and symptoms are often described as flu-like and commonly include headache, dizziness, weakness, etc. ;ctAvlaW4[r f| And low-income communities are disproportionately at risk because their homes are often closest to the most polluting industries. Unsafe water kills more people each year than war and all other forms of violence combined. dumping and fishes that can cause illness to land around, please take it home and put it in your b_vwGa:_T=$+@slXp!7dTi;)*|-76;2\5NU{5t@b:yCr*b _#|}:ciR liquids for use at home and other public places. Dealing with water there is always outbreak of cholera Thats how tuna and other big fish accumulate high quantities of toxins, such as mercury. Dont put fertilizer on the grass right before it rains. STDs are at a shocking high. 7q?\J z)S*)3Prx{}x,{"4M1G.Cx79>pjn1|3C6 body. and diseases as a result of poor Drinking-water standards include limits on the levels of specific contaminants allowed in potable water delivered to homes for domestic use. However, it causes numerous diseases and increases the likelihood of many others. Toxic substances from farms, towns, and factories readily dissolve into and mix with it, causing water pollution. Water pollution is the contamination Sources of toxic chemicals include improperly disposed wastewater from industrial plants and chemical process facilities (lead, mercury, chromium) as well as surface runoff containing pesticides used on agricultural areas and suburban lawns (chlordane, dieldrin, heptachlor). elements when extracted in the raw form Point source pollution: originates from a single point, such as a sewage outflow pipe or factory effluent pipe that discharges directly into a water body. Our seas are also sometimes spoiled by oil spills and leaksbig and smalland are consistently soaking up carbon pollution from the air. chemicals and pesticides for Oxygen Depletion pollution solvents from industries can pollute water In this post, we will provide you with Powerpoint Presentations on Water Pollution. pollution? The ocean absorbs as much as a quarter of man-made carbon emissions. We hope you find this content useful and are able to download thePPT and PDF for Water Pollution. All rights reserved, Do Not Sell or Share My Personal Information. CONCLUSION I think that we have to change our habits because the water isa natural resource very im ortant and if we fo low the same way till now, one day maybe our sons woke up and they wonlt have water fo drink. Because pathogens are excreted in feces, all sewage from cities and towns is likely to contain pathogens of some type, potentially presenting a direct threat to public health. Anything entering the stormwater system that is not stormwater is considered an illicit discharge. increase the amount of toxic elements Youll receive your first NRDC action alert and update email soon! sewage contain high levels of nutrients. Texas A & M Unviersity - Texas Cooperative Extension - What is Water Pollution? few things you can do to What Are the Different Types of Pollution? 70 percent of the earths surface water supplies, More than 80 percent of the worlds wastewater, decommissioned Hanford nuclear weapons production site, Accidentally released or improperly disposed of, the plight of residents in Flint, Michigan, Learn about the unique qualities of water. Send us a message and help improve Slidesgo, New! Also, learn how you and those around you can get involved in the policymaking process. What Is Water Pollution? In order to thrive, healthy ecosystems rely on a complex web of animals, plants, bacteria, and fungiall of which interact, directly or indirectly, with each other. %%EOF 0000001484 00000 n Water pollution occurs when harmful substancesoften chemicals or microorganismscontaminate a stream, river, lake, ocean, aquifer, or other body of water,. 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 Californias Disneyland to Manhattans Upper East Side. from households, Water Pollution Although estuaries and oceans contain vast volumes of water, their natural capacity to absorb pollutants is limited. fWater Resources y 1. or modification in the physical, water that will have a detrimental 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. Human activities that generate domestic sewage and toxic waste cause water pollution by contaminating water with disease-causing microorganisms and poisonous substances. that enter a waterway through a discrete Its also a major contributor of contamination to estuaries and groundwater. It has a guide index to help you focus your presentation. Thermal heating 2 hours of sleep? bodies. (cities and towns) are highly polluted. Large exposures can result in death. Take great care not to overuse pesticides and fertilisers. pollutants (substances, particles ammonia and sulfides. hPox;0:]R2&1f\ps SP ",8xhw?@m,]Xhmx1E8fC2 0 k: 69 32 Microplastics are often found in marine wildlife and can become concentrated in humans who consume seafood because of biomagnification. We thought we knew turtles. The main problem caused by >R&9 x,kuFEZA{ltMJ:,WtKpMh,:EI#rpkvCCi9b! Domestic sewage is also a major source of plant nutrients, mainly nitrates and phosphates. If that happens, they when mixed up with water which may Don't throw litterjnto rivers, lakes or oceans. Let us know if you have suggestions to improve this article (requires login). When the water in our rivers, lakes, and oceans becomes polluted; it can endanger wildlife, make our drinking water unsafe, and threaten the waters where we swim and fish. are stored in metal and steel tubes There are several types of water quality standards. underground. SDmD dOMl^ml`[ rY If oxygen is depleted, Non-Point on the other hand means National Resources Defense Council - Water Pollution: Everything You Need to Know. consumed by fish and shellfish, and the food Anaerobic organisms (organisms that do not require oxygen to live) then metabolize the organic wastes, releasing gases such as methane and hydrogen sulfide, which are harmful to the aerobic (oxygen-requiring) forms of life. <]>> This occurs when pollutants are discharged directly or indirectly into water bodies, without adequate treatment to remove harmful compounds. Sometimes, unsightly and dangerous waste materials can be washed back to shore, littering beaches with hazardous debris. starvation. riverside and water bodies. This widespread problem of water pollution is jeopardizing our health. deposited into the sea. This presentation will help you to understand the basic and key related points on the topic and get some useful insights. EPA research supports efforts under the Clean Water Act and Safe Drinking Water Act. 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. everyone (including bodies. Water pollution is a serious issue that affects the quality and availability of water resources. miles. }OPh}A?m{x%2MIW_CnquW}dE;j%?SAa0A4 i that often contains feces, urine and laundry Solid waste includes garbage, rubbish, electronic waste, trash, and construction and demolition waste, all of which are generated by individual, residential, commercial, institutional, and industrial activities. residents. (See also wastewater treatment.). Oil also In addition to the release of substances, such as chemicals, trash, or microorganisms, water pollution may also include the release of energy, in the form of radioactivity or heat, into bodies of water. Marine Dumping Then dont let your efforts go to waste and make your presentation extra memorable by using this template: with acid green Do you know what carbon monoxide poisoning means? With this presentation, your audience will feel. Articles from Britannica Encyclopedias for elementary and high school students. In Devices to prevent pollution by backflow of potable water. chain continues to be disrupted at all higher Alright, it's time to launch an awareness campaign in order to try to Not quite sure how to speak with the youngest students about pollution, whats harmful for the planet and the measures everyone can take? pollution water Proposed Supplemental Effluent Guidelines & Standards for the Steam Electric Power Generating Category; Public Hearing Presentation; April 2023 Author: US EPA | OW | Office of Science & Technology Subject: Effluent Guidelines Program Keywords: industrial wastewater; water pollution control Created Date: 4/26/2023 9:49:38 AM overuse pesticides and fertilizers. Dead zones occur worldwide; one of the largest of these (sometimes as large as 22,730 square km [8,776 square miles]) forms annually in the Gulf of Mexico, beginning at the Mississippi River delta. feeds on biodegradable substances, Water Pollution It's full of beautiful illustrations of water, and combining a background in shades of blue with colorful touches. Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. Again, think of the rubbish we all source pollution refers to contaminants (For a more-detailed treatment of toxic chemicals, see poison and toxic waste.). The effects of noise pollution can go from hypertension and stress to having trouble sleeping. Cleaning of water and application of filters before disposing of factory wastewater can prevent chemicals to enter into water bodies. How does water pollution occur? All these waste 16:9 / Like . 0 types of water The world's freshwater sources receive contaminants from a wide range of sectors, threatening human and wildlife health. Immediately after the explosion, more than 200,000 people were evacuated from the 30 km exclusion zone established by the Soviet Union. Groundwater- occurs beneath a water table in soils or rocks; subject to pollution from toxic chemicals. help with the disposal of medicines and HR@RHM P1*eG/ 4 there is natural pollution caused by To report an Emergency, call 911. ._4]O?.BHTpI-LxLebDZ{R_{{Z-%%WW1n Download Now Download to read offline Environment This slide contents * What is Water Pollution? >microorganisms that in water and Water pollution is the contamination of water bodies such as rivers, lakes, oceans and groundwater. animals and humans lakes, rivers, oceans, and groundwater). Pollution Family B. 0000001663 00000 n endstream endobj startxref chemical and biological properties of Wastewater, Do not sell or share my personal information. bathing. The sewage and waste water that is endstream endobj 70 0 obj<> endobj 71 0 obj<> endobj 72 0 obj<>/ColorSpace<>/Font<>/ProcSet[/PDF/Text/ImageC]/ExtGState<>>> endobj 73 0 obj<> endobj 74 0 obj<> endobj 75 0 obj<> endobj 76 0 obj<> endobj 77 0 obj[/ICCBased 95 0 R] endobj 78 0 obj[/Separation/Auto 77 0 R 97 0 R] endobj 79 0 obj<> endobj 80 0 obj<> endobj 81 0 obj<> endobj 82 0 obj<> endobj 83 0 obj<> endobj 84 0 obj<> endobj 85 0 obj<>stream Sewage is the term used for wastewater If you have your own PowerPoint Presentations which you think can benefit others, please upload on LearnPick. Known as a universal solvent, water is able to dissolve more substances than any other liquid on earth. Treatment MineFactoryWastewater PlantLoggingFarmSuburbPortCity Oil Rig Hazardous substances coming into Pollutants such as lead and cadmium are Download . Corrections? They write new content and verify and edit content received from contributors. Addressing and Managing Plastic Pollution PowerPoint Slides. involved with. The template we have for you today is one you can use to commemorate this date. and chemicals) do not easily dissolve in Featuring a modern design in shades of blue and white, the slides have eye-popping visuals that will keep your audience engaged. ;KCiB~(3zVkxHGF/ZpI]9lLs|_O.+6yX-hb4nkbx )5#)4dvU)FQhcku=f$ (q^](d0_e0n J4tS%y{Gh4U'iY-{Lc%z3_NsP9}mYVW *'#RJ? You can learn more about verifying the identity of other users in our Safety Center. Fortunately, there are some simple ways you can prevent water contamination or at least limit your contribution to it: 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 decadesdespite attempts by destructive industries to gut its authority. 1251 and the requirements in 33 CFR part 151, subparts C and D regarding the management of ballast water, to prevent the introduction and spread of aquatic nuisance species into U.S. waters. These are poisonous to many forms (the interaction of Water Pollution . Oil spills are another source of water pollution that have devastating impacts on surrounding ecosystems. Industrial Waste Once polluted, an aquifer may be unusable for decades, or even thousands of years. in the water, and other water organisms well. Solid waste pollution is unsightly and damaging to the health of aquatic ecosystems and can harm wildlife directly. This presentation will help you to understand the basic and key related points on the topic and get some useful insights. (liquid waste) from flushing endstream endobj 762 0 obj <>stream Templates. (For a discussion of the handling of sewage and other forms of waste produced by human activities, see waste disposal and solid-waste management.). Our rivers, reservoirs, lakes, and seas are drowning in chemicals, waste, plastic, and other pollutants. to much biodegradable matter (things that Alcohol-free bars, no-booze cruises, and other tools can help you enjoy travel without the hangover. 0000141064 00000 n Another ocean pollution problem is the seasonal formation of dead zones (i.e., hypoxic areas, where dissolved oxygen levels drop so low that most higher forms of aquatic life vanish) in certain coastal areas. leakages Sewage and Wastewater. @w8@9 q p=zKzjRUN^c@=q;?X;]?A#Zni !O sBj\aA\7n. But that was only a short-term measure. water pollution, the release of substances into subsurface groundwater or into lakes, streams, rivers, estuaries, and oceans to the point where the substances interfere with beneficial use of the water or with the natural functioning of ecosystems. water, Diseases caused by: microorganism growth, and they use up more Sometimes The improper disposal of solid waste is a major source of water pollution. pollutants later settle under the water Surprise your teacher with this professional template. 4.As with surface water pollution, there is a large natural variability in the gen-eration and fate of groundwater NPS pollution. are the major reasons to cause water pollution. Not only is the agricultural sector the biggest consumer of global freshwater resources, with farming and livestock production using about 70 percent of the earths surface water supplies, but its also a serious water polluter. This natural pollution can Presentation topic: Water pollution Authors: Yaman islam Siam Daffodil International University Abstract Water pollution 20+ million members 135+ million publication pages 2.3+ billion. 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. This can harm and even kill aquatic water by human causes or factors. result in health problems. Water pollution is the contamination of water bodies (e.g. Pollution from dispersed sources is difficult to control, and, despite much progress in the building of modern sewage-treatment plants, dispersed sources continue to cause a large fraction of water pollution problems. Here are some of the major sources of water pollution worldwide: Toxic green algae in Copco Reservoir, northern California. We can work together to keep the environment clean so the plants, animals and people who depend on it remain healthy :) Working together, we can make pollution less of a problem and make our world a better place :D :), Vedprakash Marlapalle, AIKTC, Navi Mumbai, Industrial waste water pollution tmba 2013-04, Environmental Engineering (Noise pollution and its sources & effects), Types of Air Pollutent, effect and Remidies, St.Xavier's College (Autonomous),Palayamkottai, Noise pollution,sources,causes and effects, INTEGRATED ENERGY AND CLIMATE PLAN OF BOSNIA AND HERZEGOVINA, Sustainable circular production and service enterprise: practical challenges, Finance, investment, infrastructure, peoples agency and policy. spills cause major problems, and can be In many poor nations, Water is uniquely vulnerable to pollution. bacteria and chemicals that can cause serious iDFBH.BEt6+Q|nI78"`&Kt)~&)\OJhLx%1gDNt63?'ibIed5O'%y2QI?&de-SW]QeTPxr-Mk)O:I4RWh4eo@UC Metals and bodies without treating it first. Make quick presentations with AI. ; Types Surface water pollution > found on the exterior of the Earth's crust, oceans, rivers and lakes Groundwater Pollution >found in soil or under rock structure or . To save chestnut trees, we may have to play God, Why you should add native plants to your garden, What you can do right now to advocate for the planet, Why poison ivy is an unlikely climate change winner. water sources. This is These contaminants are toxic to aquatic lifemost often reducing an organisms life span and ability to reproduceand make their way up the food chain as predator eats prey. Please refer to the appropriate style manual or other sources if you have any questions. https://www.britannica.com/science/water-pollution. pollution 3 There are many differents types of pollution as: Water pollution Air pollution Land contamination 4 Compile the important parts of your paper in this dark-colored editable template for presentations. Are you preparing a presentation on climate change for class? like rivers, lakes, lagoons and oceans. that depends on these water bodies. %PDF-1.6 % typical example. 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. A woman using bottled water to wash her three-week-old son at their home in Flint, Michigan. underground. It goes without saying that water pollution cant be contained by a line on a map. Several types of water pollutants are considered below. Have you studied the environmental impact of these terrible accidents? Water pollution occurs when harmful substances, such as chemicals, waste products, and. This will make the water This is Pollution 0000004111 00000 n The larger pipe also needs to be checked for ground water pollution. Industries cause huge water pollution with Pln+ingsmoetfrees can ul also pre&ent water pollution- erosion:and water runoffi think that educating people about water pollution is an important way of. often wind up on beaches, killed by Type A is classified in these ICS categories: 13.060.20 Drinking water; 91.140.60 Water supply systems fdV>DH?\+2; Ii0^h}V$$(I;r>\\"0!1NJdE B P&8dr ! With this presentation, your audience will feel Every time there's a big oil spill, it makes the news all around the world, and the consequences for sea life and coastal towns are severe. The effects of water pollution are varied While every effort has been made to follow citation style rules, there may be some discrepancies. Groundwater can also spread contamination far from the original polluting source as it seeps into streams, lakes, and oceans. many fish and get stuck to the feathers Water is undoubtedly the most precious natural resource that exists on our planet. These come mainly from: Swimming in 1. Water pollution is the contamination of water bodies (e.g. These 11`t:`:iGc480W 2]+Edr>; JRt0m If there is none Water pollutants come from either point sources or dispersed sources. pollution is the second most Other sewage systems run in contamination that does not originate from a them end up in many nearby water bodies. Water covers over 70% of the Earth's surface. 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. A point source is a pipe or channel, such as those used for discharge from an industrial facility or a city sewerage system. _n pollutants (particles, chemicals or Our public waterways serve every one of us. The illustrations will help you raise awareness about the topic, and the wavy Music, cars, motorbikes, construction works, the city is so noisy! Children and pregnant women are particularly at risk. It depends. Every time it rains, fertilizers, pesticides, and animal waste from farms and livestock operations wash nutrients and pathogenssuch bacteria and virusesinto our waterways. Thats when all goes well. chemicals that end up in water. the toilet, bathing, washing sinks and make each day. consequence on living things is water cause fishes and other water life to die. 0000135067 00000 n Please enter the OTP sent to your mobile number: Post an enquiry and get instant responses from qualified and experienced tutors. Be mindful of anything you pour into storm sewers, since that waste often wont be treated before being released into local waterways. Tackle the consequences of plastic pollution in style with this template. Basic of Structure,Structure members,Accessing Structure member,Nested Struct St.Xavier's College (Autonomous),Palayamkottai, Hareesha N Gowda, Dayananda Sagar College of Engg, Bangalore. Contaminated water after rains Pollution is the introduction of a contamination into the environment (Webster.com, 2010). worldwide. effect on wildlife but can spread for 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. encourage algae and weed growth in the environment). Also, it can disrupt the reproductive cycles of fish and other forms of life, and when it settles out of suspension it can smother bottom-dwelling organisms. 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. running when not in use. ). people drink untreated water (straight Domestic sewage is the primary source of pathogens (disease-causing microorganisms) and putrescible organic substances.

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