Indiana Stormwater-General regulations & environmental compliance analysis

Indiana Stormwater-General: What you need to know

Governing Law and Regulations

National Pollutant Discharge Elimination System (NPDES) permit program: 327 Indiana Administrative Code (IAC) 5-2-1 to 5-2-23

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General permits: 327 IAC 15-1-1 to 15-12-10

Individual permits: 327 IAC 5-3-2

Regulatory Agencies

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

Local county soil and water conservation district offices

U.S. Environmental Protection Agency (EPA) Region 5

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Indiana has authority from the U.S. Environmental Protection Agency (EPA) to administer the National Pollutant Discharge Elimination System (NPDES) program, including stormwater discharges. Indiana has state-specific general permits for stormwater discharges associated with industrial facilities, construction activities, and municipal separate storm sewer systems (MS4s). See the national section STORMWATER—GENERAL for information on the federal permitting program, and the state sections STORMWATER—INDUSTRIAL FACILITIES, STORMWATER—CONSTRUCTION ACTIVITIES, and STORMWATER— MUNICIPALITIES for more information on the state requirements for these specific discharges.

Administration and enforcement. IDEM's OWQ is responsible for the administration of the stormwater discharge permit rules in Indiana. A permittee is required to report any noncompliance to IDEM's Office of Enforcement within 1 business day from the time it has knowledge of noncompliance.

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