Illinois Pretreatment Standards: What you need to know
Governing Law and Regulations
Pretreatment standards: 415 Illinois Compiled Statutes (ILCS) 5/13.3 to 5/13.5
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U.S. Environmental Protection Agency (EPA) Region 5
Illinois Environmental Protection Agency (IEPA) Bureau of Water
See national section for basic information and federal regulations.
Comparison: State vs. Federal
• Rules. Illinois has pretreatment regulations that mirror the federal requirements. While the Illinois Environmental Protection Agency (IEPA) is currently authorized by the EPA to administer the National Pollution Discharge Elimination System (NPDES) program, it does not have authority to oversee the pretreatment portion in Illinois.
• Administration and enforcement. U.S. Environmental Protection Agency (EPA) Region 5 has primary responsibility for administering the Illinois pretreatment program. It functions as the approval authority and must review and approve the technical justification for local limits before local limits are incorporated into sewer use ordinances or industrial user control documents.
Illinois has adopted federal general and categorical pretreatment standards applicable to existing and new nondomestic sources that discharge to publicly owned treatment works (POTW). Industrial users must follow pretreatment standards and obtain a pretreatment permit from EPA Region 5. Once a POTW receives approval to administer the program, that POTW may issue authorizations to discharge, which are similar to permits.