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See national section for basic information and federal regulations.
Comparison: State vs. Federal
• Rules. The state is fully authorized by the U.S. Environmental Protection Agency (EPA) to administer the NPDES permit program and the federal pretreatment program. For additional guidance, see the national section PRETREATMENT STANDARDS.
South Carolina's pretreatment standards are largely the same as the federal NPDES standard. However, there are a number of differences for submitting pretreatment programs for approval, revision, and withdrawal, and the reporting requirements for POTWs with approved pretreatment programs.
The discharge of pollutants into a POTW from any nondomestic source is prohibited if such a discharge would cause "pass through" or "interference." In addition to federal rules, South Carolina defines "interference" as including an increase in the magnitude or duration of a violation of the POTW's NPDES permit.