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Municipal Storm Water Program

Grand River Lansing
Environment, Great Lakes, and Energy

Municipal Storm Water Program

The goal of the Municipal Separate Storm Sewer System (MS4) program is to reduce the discharge of pollutants to surface waters of the State.  An MS4 is a system of drainage (including roads, storm drains, pipes, and ditches, etc.) that is not a combined sewer or part of a sewage treatment plant.  During wet weather, pollutants are transported through MS4s to local water bodies. 

Permits

Storm water discharges from a regulated MS4 to a surface water of the State in an urbanized area are subject to regulation under the National Pollutant Discharge Elimination System.  MS4 permittees generally include the following municipal entities: cities, townships, villages, county agencies, universities, and school districts.  The Department completed maps to identify MS4s located in an urbanized area that may require coverage under an MS4 permit. 

Who may be regulated: Urbanized Area Maps

How to view permits on public notice: MiWaters Public Notice

Compliance Assistance Documents

The following documents are available to assist with developing and implementing a Storm Water Management Program (SWMP) as part of the MS4 program.

Storm Water Resources

 

Contacts

Lishba Varughese
VarugheseL@Michigan.gov
248-508-1083

MS4 Program Staff Assignments

Michigan's Storm Water programs

Common information

Laws and Rules