Dispersed-source pollutant | water pollution | Britannica (original) (raw)

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water pollution

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  In water pollution: Types and sources of water pollutants
  …from either point sources or dispersed sources. A point source is a pipe or channel, such as those used for discharge from an industrial facility or a city sewerage system. A dispersed (or nonpoint) source is a very broad unconfined area from which a variety of pollutants enter the water…
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water pollution control

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  In wastewater treatment: Sources of water pollution
  …farms, for example, is a dispersed source of pollution, carrying animal wastes, fertilizers, pesticides, and silt into nearby streams. Urban storm water drainage, which may carry sand and other gritty materials, petroleum residues from automobiles, and road deicing chemicals, is also considered a dispersed source because of the many locations…
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