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Topic: Water pollution

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  Water pollution - Wikipedia, the free encyclopedia
Water pollution is a large set of adverse effects upon water bodies (lakes, rivers, oceans, groundwater) caused by human activities.
Pollutants in water include a wide spectrum of chemicals, pathogens, and physical chemistry or sensory changes.
Concern over water pollution in the USA resulted in the enactment of state anti-pollution laws in the latter half of the 19th century, and federal legislation enacted in 1899.
en.wikipedia.org /wiki/Water_pollution   (1378 words)

 Water Pollution - MSN Encarta
Water is often drawn from rivers, lakes, or the ocean for use as a coolant in factories and power plants.
Polluted water may flow from mines where the water has leached through mineral-rich rocks or has been contaminated by the chemicals used in processing the ores.
In the countryside, efforts are underway to reduce pollution from agricultural wastes, fertilizers, and pesticides, and from erosion caused by logging and farming.
encarta.msn.com /encyclopedia_761572857_3/Water_Pollution.html   (1516 words)

 Water Pollution - MSN Encarta
Plants and animals require water that is moderately pure, and they cannot survive if their water is loaded with toxic chemicals or harmful microorganisms.
If severe, water pollution can kill large numbers of fish, birds, and other animals, in some cases killing all members of a species in an affected area.
Fish and shellfish harvested from polluted waters may be unsafe to eat.
encarta.msn.com /encyclopedia_761572857/Water_Pollution.html   (557 words)

 Water Pollution
The beneficial uses of water are varied and include its use for drinking and for domestic purposes, for watering livestock and the irrigation of crops, for fisheries - both game [salmonid] and coarse [cyprinid], for industry and for food production, for bathing and for recreational and amenity use.
Where the degree of pollution is severe these compensating factors may be insufficient to prevent the oxygen content of the water decreasing to very low levels, or, in the worst case, to anaerobic conditions, where there is a complete absence of free oxygen.
This is a type of invisible pollution, known as non-point source pollution, because the pollutants are diffused over wide areas and tend to reach waterbodies by indirect and tortuous pathways.
www.enfo.ie /leaflets/bs11.htm   (2129 words)

 Water Pollution
Water pollution is a dilemma that can be very harmful to both the people and the environment they live in.
Water pollution is not a problem that only takes nature's beauty away, but it also sabotages the living environment for all organisms.
A common kind of water pollution is the effect cause by heavy concentrations of nitrogen and phosphorus, which are used by plants for growth.
www.geocities.com /SiliconValley/Haven/9656/Science.html   (3252 words)

 Water pollution FAQ
Water pollution is any chemical, physical or biological change in the quality of water that has a harmful effect on any living thing that drinks or uses or lives (in) it.
Water can also be polluted by a number of organic compounds such as oil, plastics and pesticides, which are harmful to humans and all plants and animals in the water.
Water pollution is detected in laboratories, where small samples of water are analysed for different contaminants.
www.lenntech.com /water-pollution-FAQ.htm   (1079 words)

 Water pollution   (Site not responding. Last check: 2007-10-22)
Agricultural run-off, or the water from the fields that drains into rivers, is another major water pollutant as it contains fertilizers and pesticides.
When fresh water is artificially supplemented with nutrients, it results in an abnormal increase in the growth of water plants.
But water pollution is concentrated within a few subsectors, mainly in the form of toxic wastes and organic pollutants.
edugreen.teri.res.in /explore/water/pollu.htm   (1133 words)

 Water Pollution - MSN Encarta
Water Pollution, contamination of water by foreign matter such as micro-organisms, chemicals, industrial or other wastes, or sewage.
Heat may also be considered a pollutant when increased temperatures in bodies of water result from the discharge of cooling water by factories and power plants.
Agriculture, including commercial livestock and poultry farming, is the source of many organic and inorganic pollutants in surface waters and groundwater.
uk.encarta.msn.com /encyclopedia_761572857/Water_Pollution.html   (703 words)

 EcoWorld - Water Articles
Water is the common name for the liquid state of the hydrogen-oxygen compound H
Pure water is odorless and tasteless, and at greater depths has a blue tint.
Water will obtain its maximum density at 4� C (39� F) and when it freezes it expands.
www.ecoworld.com /water/ecoworld_water_home.cfm   (332 words)

 Water Pollution Control
Water that collects in street drains during a rainstorm is not considered wastewater but rather storm water.
This water is collected in a network of storm sewers and conveyed to the local rivers with no treatment.
The goal of the program is to protect the sewer system, treatment plants and environment from pollutants that are harmful to the system or that may pass through the system directly into the environment.
www.moline.il.us /departments/public_works/water_pollution_control.asp   (1377 words)

 Fresh Water and Fresh Water Pollution Web Resources for Students
The Water Cycle (also known as the hydrologic cycle) is the journey water takes as it circulates from the land to the sky and back again.
The water cycle, the continuous movement of water from ocean to air and land then back to the ocean in a cyclic pattern, is a central concept in meteorology.
Water and sediments taken from a pond or creek support an abundance of plant and animals, which can be sealed in a jar and observed for years to come.
www.cdli.ca /CITE/water.htm   (1125 words)

 Our Land, Our Literature: Environment - Water Pollution
Water pollution is "any physical or chemical change in surface water or groundwater that can harm living organisms or make water unfit for certain uses" (Miller G17).
Pollution of surface and ground water is of particular concern in Indiana.
The history of water pollution is difficult to trace; before the Clean Water Act of 1972, companies indiscriminately dumped dangerous waste into bodies of water with reckless abandon.
www.bsu.edu /ourlandourlit/Environment/Issues/Water_Pollution.html   (477 words)

 Encyclopedia :: encyclopedia : Water pollution   (Site not responding. Last check: 2007-10-22)
Groundwater pollution is more difficult to clean up than surface pollution because groundwater can move hundreds of miles through unseen aquifers.
Porous, fine-grained aquifers such as sands and sandstones naturally purify water of bacteria by simple filtration (adsorption and absorption), dilution, and, to a lesser extent, chemical reactions and biological activity.
The causes of water pollution can be divided into two groups: anthropogenic sources of pollution are those due to human choices, and natural sources are those resulting from forces intrinsic to the environment.
www.hallencyclopedia.com /Water_pollution   (876 words)

 Ground water, Water Science for Schools
Water at very shallow depths might be just a few hours old; at moderate depth, it may be 100 years old; and at great depth or after having flowed long distances from places of entry, water may be several thousands of years old.
Ground water is the part of precipitation that seeps down through the soil until it reaches rock material that is saturated with water.
Water in the ground is stored in the spaces between rock particles (no, there are no underground rivers or lakes).
ga.water.usgs.gov /edu/earthgw.html   (959 words)

 Water Education Foundation - Water Kids!
Water evaporates from oceans, rivers and lakes (water in its liquid form) and rises into the atmosphere (water in its gas form) where it condenses to form clouds.
Most people think water pollution comes directly from a factory or other known source, a type of pollution known as "point source pollution." Because of laws passed in the 1970s, most of those sources of pollution have cleaned up their act.
The Water Education Foundation is a proud supporter of the CD Rom and its goal encourage children to understand the importance of caring for the environment and the role they can play within their own communities.
www.water-ed.org /kids.asp   (1093 words)

 Water Pollution
According to the American College Dictionary, pollution is defined as: “to make foul or unclean; dirty.” Water pollution occurs when a body of water is adversely affected due to the addition of large amounts of materials to the water.
Pollution is also caused when silt and other suspended solids, such as soil, washoff plowed fields, construction and logging sites, urban areas, and eroded river banks when it rains.
Water quality is closely linked to water use and to the state of economic development.
www.umich.edu /~gs265/society/waterpollution.htm   (2739 words)

 Water Pollution
Water pollution was originally caused by need of space (to dump trash).
Water pollution is something that should have been stopped many years ago and still should be stopped.
Millions of animals are killed by water pollution not to mention the 10,000,000 people who die each year from drinking polluted water.
www.studyworld.com /newsite/ReportEssay/Science/Earth\Water_Pollution-36240.htm   (701 words)

 Water Pollution
Water pollution is the contamination of water sources by substances which make the water unusable for drinking, cooking, cleaning, swimming, and other activities.
This is the same as 1 drop in a bathtub of water.
Water pollutants may actually cause disease or act as poisons.
www.hsph.harvard.edu /ehep/water_pollution.htm   (696 words)

 Science Experiments: Air and Water Pollution | Introduction
Pollution usually is in the form of gas, liquid, and solid materials; it results from anything that alters the natural environment, such as a temperature shift and noise.
Air and water pollution has become a significant problem since the growth of cities, industry, and travel in the late nineteenth century.
Pollution upsets the natural cycles on which all life depends, causing a ripple effect that can harm organisms hundreds of miles away from the pollutant.
science.enotes.com /science-experiment/air-water-pollution   (258 words)

 water pollution
water pollution: Dangers of Water Pollution - Dangers of Water Pollution Virtually all water pollutants are hazardous to humans as well as lesser...
water pollution: Industrial Pollution - Industrial Pollution In the United States industry is the greatest source of pollution, accounting...
Overcoming agricultural water pollution in the European Union.
www.infoplease.com /ce6/sci/A0851609.html   (214 words)

 SWRCB Storm Water Pollution & Solutions
The water that goes down a sink or toilet in you home or business flows to a wastewater treatment plant where it is treated and filtered.
Water that flows down driveways and streets and into a gutter goes into a storm drain which flows directly to a lake, river or the ocean.
By reading this pamphlet and educating yourself on what causes storm water pollution you are on the right path to preventing it.
www.waterboards.ca.gov /stormwtr/whatissw.html   (370 words)

 Guide to water pollution
Welcome to the Water Pollution Guide, where you can find useful information about the sources of water pollution and how they can be treated.
Water covers over 70% of the Earths surface and is a very important resource to people and the environment.
Water pollution affects drinking water, rivers, lakes and oceans all over the world.
www.water-pollution.org.uk   (129 words)

 Water Pollution definition - Water Technology
Water pollution refers to the addition of foreign substances (pollutants) to a water source.
Pollution can be introduced to water from both point sources and diffuse sources.
Common sources of pollutants include man-made industrial waste and domestic sewage, and natural sources such as soil errosion and silt-bearing runoff.
www.water-technology.net /glossary/water-pollution.html   (79 words)

 Water Pollution   (Site not responding. Last check: 2007-10-22)
The three basic types of water contaminants are microbes, chemicals, and byproducts of decontamination processes.
Many water treatment plants are beginning to use less harmful chemicals (such as ozone) in their purification processes.
The Envionmental Protection Agency began to enforce drinking water standars in 1977, and the EPA issued limits on the amount of chloroform and related chemicals that can be found in the drinking water of large cities.
www.bergen.org /AAST/Projects/ES/WS/pollution.html   (452 words)

 Water Pollution
Water pollution is a serious public and wildlife health problem in Wisconsin.
Surface water pollution is still a problem in Northeast Wisconsin despite decades of effort, partly due to industrial and sewage pipe discharges into lakes, rivers and streams.
Couple this with loopholes in the laws and compromised water quality standards, and we still have a lot of work to do to protect public health and wildlife from water pollution.
www.cwac.net /water_pollution/index.html   (993 words)

 Water Pollution
Eutophication is the pollution of rivers and lakes caused by leaching of fertilizers, detergents, or sewage into the water.
Water returned to the river is often at a higher temperature than normal river water.
Water is a precious resource but it is being polluted in a variety of ways.
www.crocodile-clips.com /absorb/AC4/sample/LR1105.html   (863 words)

 Sources of Water Pollution   (Site not responding. Last check: 2007-10-22)
In the United States and other countries, these practices are regulated, although this doesn't mean that pollutants can't be found in these waters.
They include poisonous drinking water, poisionous food animals (due to these organisms having bioaccumulated toxins from the environment over their life spans), unbalanced river and lake ecosystems that can no longer support full biological diversity, deforestation from acid rain, and many other effects.
made with polluting dyes, many of which are released from groundwater at municipal land fills.
www.soest.hawaii.edu /GG/ASK/waterpol3.html   (464 words)

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