Others treat it themselves before it is released, and still others send their wastes to sewage treatment plants for treatment.
Some factories discharge their effluents directly into a waterbody. Factories, including oil refineries, pulp and paper mills, and chemical, electronics and automobile manufacturers, typically discharge one or more pollutants in their discharged waters (called effluents).
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.”įactories and sewage treatment plants are two common types of point sources.
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