Nonpoint Source Pollution: a NOAA Ocean Service tutorial

NOAA's National Ocean Service tutorial, a lesson a page, in order.

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Nutrients

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Suspended Sediments

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Pesticides and Toxic Chemicals

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Bacteria, Viruses, and Trash

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Controlling Nonpoint Source Pollution

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What You Can Do

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Point Source

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The U.S. Environmental Protection Agency (EPA) defines point source pollution as “any single identifiable source of pollution from which pollutants are discharged, such as a pipe, ditch, ship or factory smokestack.” Factories and sewage treatment plants are two common types of point sources. Factori

Nonpoint Source

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Urban and Suburban Areas

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Agricultural Operations

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Agricultural operations account for a large percentage of nonpoint source pollution in the United States. According to the Census of Agriculture, approximately 940 million acres of farmland existed in the United States in 2002. While the vast breadth of this land provides space for farming — an indu

Forestry and Mining Operations

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