Indiana Pretreatment Standards regulations & environmental compliance analysis

Indiana Pretreatment Standards: What you need to know

Governing Law and Regulations

National Pollutant Discharge Elimination System (NPDES) program: 327 Indiana Administrative Code (IAC) 5-1-1 to 5-1-3

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Pretreatment definitions: 327 IAC 5-17-1 to 5-17-25

General pretreatment provisions: 327 IAC 5-16-1 to 5-16-7

Applicable standards and pretreatment requirements: 327 IAC 5-18-1 to 5-18-10

Industrial permit program: 327 IAC 5-21-1 to 5-21-11

Publicly owned treatment works (POTW) programs: 327 IAC 5-19-1 to 5-19-7

Removal Credits: 327 IAC 5-20-1 to 5-20-4

Regulatory Agency

Indiana Department of Environmental Management (IDEM) Office of Water Quality

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Indiana has its own state permitting requirements and fees associated with its state pretreatment program. The state has also adopted the federal pretreatment categorical standards, and the state's prohibited discharge requirements mirror the federal regulations. Indiana also. See the national section PRETREATMENT STANDARDS for more information.

Administration and enforcement. IDEM's Office of Water Quality is responsible for administering the Indiana pretreatment program and has authority to enforce its requirements.

State Requirements


Many municipalities are designated "Pretreatment Cities" by IDEM. In pretreatment cities, POTWs do their own permitting, inspecting, sampling, and enforcement. Dischargers must apply directly for a pretreatment permit to a local program if the discharger is located within one of the state's pretreatment cities. IDEM oversees all pretreatment cities by conducting periodic audits of each program. Contact ...

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