Michigan Stormwater-Municipalities regulations & environmental compliance analysis

Michigan Stormwater-Municipalities: What you need to know

Governing Law and Regulations

National Pollutant Discharge Elimination System (NPDES) stormwater discharge permits: Michigan Administrative Code (MAC) r. 323.2161

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Municipalities: MAC r. 323.2161a

Fees: Michigan Compiled Laws (MCL) 324.3118

Regulatory Agencies

Michigan Department of Environmental Quality (DEQ)Water Resource DivisionStormwater Program

Michigan Department of Agriculture (MDA)

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Michigan has received federal authorization from the U.S. Environmental Protection Agency (EPA) to issue National Pollutant Discharge Elimination System (NPDES) permits, including permits for stormwater discharges associated with municipal separate storm sewer systems (MS4s), and issues two general permits for such discharges. The Michigan Department of Environmental Quality (DEQ) has adopted the federal requirements for stormwater and has additional requirements. See the national section STORMWATER—MUNICIPALITIES to learn more about the federal MS4 permitting program.

Administration and enforcement. DEQ's nine district offices administer and enforce the stormwater discharge permit rules in Michigan.

State Requirements


MAC r. 323.2161a

Michigan has established two general permits for MS4s in compliance with the provisions of the federal Clean Water Act (CWA) in accordance with the conditions issued in the NPDES permit program: the watershed permit (MIG619000) and the jurisdictional permit (MIS040000).

The applicability of the MS4 general permits is limited to direct or indirect point source discharges of stormwater and nonstormwater from ...

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