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Pretreatment Standards
National Summary
Pretreatment standards are derived from a variety of sources. The Clean Water Act (CWA) requires the U.S. Environmental Protection Agency (EPA) to promulgate pretreatment standards and requirements with the purpose of reducing the level of pollutants discharged by industry and other nondomestic wastewater sources into municipal storm sewer systems. The EPA has established general and specific prohibited discharge standards that are applicable to all nondomestic users and categorical general pretreatment regulations that require publicly owned treatment works (POTWs) to develop local limits when necessary to implement the prohibited discharge standards. Limits may be met by industrial sources through pollution prevention techniques (product substitution, recycling, and reuse of materials), best management practices, or treatment of the wastewater. States and POTWs have the option of establishing more stringent requirements.
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