Sunday, June 08, 2008

Water Pollution

Water pollution is the contamination of water bodies such as lakes, rivers, oceans, and groundwater caused by human behavior, which can be harmful to organisms and plants which live in these water bodies.

Even though natural phenomena such as volcanoes, algae blooms, storms, and earthquakes also cause major changes in water quality and the ecological status of water, water is naturally referred to as polluted when it impaired by anthropogenic contaminants and either does not support a human use (like serving as drinking water) or undergoes a marked shift in its ability to support its constituent biotic communities. Water pollution has many causes and uniqueness. The main sources of water pollution are generally grouped into two categories based on their point of origin. Point-source pollution refers to contaminants that enter a waterway through a discrete "point source". The second primary category, non-point source pollution, refers to contamination that, as its name suggests, does not create from a single discrete source.

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1 Comments:

Blogger Peter Maier said...

As long as EPA does not consider nitrogenous waste (urine and protein) pollution, we will never implement the Clean Water Act, as it was intended. This waste not only, like fecal waste, exerts an oxygen demand, but also is a fertilizer for algae and aquatic plant growth, causing eutrophication and eventually dead zones.

The reason EPA ignored this pollution is caused by a worldwide incorrect applied pollution test that EPA used to base its NPDES discharge permits on.

Although EPA in 1984 acknowledged this incorrect use, in stead of correcting the test, it allowed an alternative test and now officially ignored this type of pollution and by doing so lowered the goal of the CWA from 100% treatment to a measly 35% treatment, without notifying Congress.

Other problems caused by this incorrect applied test are that we do not know the real performance of a sewage treatment plants and have no idea what the effluent waste loading is on receiving water bodies, besides the possibility that such plants are designed to treat the wrong waste in sewage.

Want to know more visit www.petermaier.net and read the description of this test (BOD) in the Technical PDF section.

3:28 PM  

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