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The U.S. Environmental Protection Agency (EPA) defines point source pollution as âany single identifiable source of pollution from which pollutants are discharged, such as a pipe, ditch, ship or factory smokestackâ (Hill, 1997).Factories and sewage treatment plants are two common types of point sources.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).actories and sewage treatment plants are two common types of point sources. 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).
Point source pollution results when the contaminants come from a single location. Examples of point source pollution in the air, water and soil are given below. Air. A certain factory is producing chemicals. As part of the manufacturing process, certain poisonous chemicals and toxic gases result, such as benzene.nd, even if laws are followed now, these types of practices occurred in the past before the laws were enacted and the pollutants are still around. Non-point-source pollution results when contaminants are introduced into the environment over a large, widespread area. Some examples follow.