WATER POLLUTION
Water
pollution is the
contamination of water bodies (e.g. lakes, rivers, ocens, aquefers and groundwaters). Water pollution occurs when pollutents are discharged directly or
indirectly into water bodies without adequate treatment to remove harmful compounds.
Water
pollution affects plants and organisms living in these bodies of water. In almost all cases the effect is
damaging not only to individual species and populations, but also to the
natural biological
communities.
Water
pollution is a major global problem which requires ongoing evaluation and
revision of water
resource policy at all
levels (international down to individual aquifers and wells). It has been
suggested that it is the leading worldwide cause of deaths and diseases, and that it accounts for the deaths
of more than 14,000 people daily. An estimated 700 million Indians have no access to a proper toilet, and 1,000 Indian
children die of diarrheal sickness every day. Some 90% of China's cities suffer from some degree of water pollution, and nearly 500 million people lack
access to safe drinking water. In addition to the acute problems
of water pollution in developing
countries, developed
countries continue to
struggle with pollution problems as well. In the most recent national report on
water
quality in the
United States, 45 percent of assessed stream miles, 47 percent of assessed lake
acres, and 32 percent of assessed bays and estuarine square miles were classified as
polluted.
Water is
typically referred to as polluted when it is impaired by anthropogenic contaminants and either does not
support a human use, such as drinking water, and/or undergoes a marked shift in
its ability to support its constituent biotic communities, such as fish.
Natural phenomena such as volcanoes, algae blooms, storms, and earthquakes also cause
major changes in water quality and the ecological status of water.
Water
pollution comes in many forms. It can be as blatant as a factory dumping tons
of chemical waste directly into a body of water or it can be something more
‘subtle,’ such as oil that gets washed into the water ways with storm water
runoff or waste water from your shower that contains chemicals from shampoos
and soaps. None of it can really be considered ‘subtle.’ According to Jay
Manning, Director, Wash. Dept. of Ecology, runoff from the streets of Seattle
dump the equivalent of the Exxon Valdez oil spill into Puget Sound every two
years. (5.4 million gallons per year).
We
all contribute to water pollution in one way or another. Our water quality and
the ecosystems that depend on healthy water, the way nature intended, are not
just suffering but dying completely.
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