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Point source pollution
Pollutant that enters the environment from an easily identified and confined place.
Nonpoint source pollution
Pollutants entering the environment from many places at once; difficult to identify one individual source.
Examples of point source pollutants
Animal waste runoff from a CAFO, emissions from a smokestack of a coal power plant, BP oil spill.
Examples of nonpoint source pollutants
Urban runoff, pesticides sprayed on agricultural fields, carried by wind and washed off into bodies of water.
What are the primary areas polluted by nonpoint sources from large watersheds?
Estuaries and bays.