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National Pollutant Discharge Elimination System (NPDES)

Combined Sewer Overflows in the Great Lakes Basin-Michigan

There are 152 NPDES permits which authorize discharges from combined sewer overflows (CSOs) to the Great Lakes Basin. Select the state in the right-side box for the list of CSO permits in the Great Lakes Basin in that state.

There are 33 NPDES permits for CSO discharges in the Great Lakes Basin in Michigan. The table below provides information about those permittees. The Michigan Department of Environment, Great Lakes, and Energy has published an Annual Report describing the CSO discharges that occurred by these permittees in 2018, see: Combined Sewer Overflow (CSO), Sanitary Sewer Overflow (SSO), and Retention Treatment Basin (RTB) Discharge 2018 Annual Report(1112 pp, 9.8 MB, About PDF)Exit

Map of CSOs in Michigan that drain to the Great Lakes Basin

The following links exit the site Exit

Municipal Operator of CSO NPDES Permit Number Great Lake Discharged To Water Body Directly Discharged Into Website
Bay City WWTP MI0022284 Lake Huron Saginaw River Bay City website
Birmingham MI0025534 Lake Erie Rouge River Birmingham website
Bloomfield Village CSO MI0048046 Lake Erie Rouge River Bloomfield Village website
Chapaton RTB MI10025585 Lake Erie Chapaton Canal Chapaton website
Croswell WWTP MI10021083 Lake Erie Black River  
Dearborn CSO MI0025542 Lake Erie Rouge River; Detroit River Dearborn website
Detroit WWTP MI0022802 Lake Erie Rouge River; Detroit River  
Dundee WWTP MI0020401 Lake Erie Raisin River  
East Lansing WWTP MI0022853 Lake Michigan Red Cedar River East Lansing website
Essexville WWTP MI0022918 Lake Huron Saginaw River Essexville WWTP
Gladwin WWTP MI0023001 Lake Huron Cedar River  
Grand Rapids WWTP MI0026069 Lake Michigan Grand River  
Inkster/Dearborn Heights CSO MI0051837 Lake Erie Lower Rouge River Inkster/Dearborn Heights website
Iron Mountain Kingsford WWTP MI0023205 Lake Michigan Menominee River Iron Mountain Kingsford website
Lansing WWTP MI0023400 Lake Michigan Grand River; Red Cedar River Lansing website
Manistee WWTP MI0020362 Lake Michigan Manistee Lake Manistee website
Manistique WWTP MI0023515 Lake Michigan Manistique River Manistique website
Marysville WWTP MI0020656 Lake Erie St. Claire River Marysville website
Menominee WWTP MI0025631 Lake Michigan Menominee River Menominee website
Milk River CSO RTB MI0025500 Lake Erie Milk River Milk River website
Mt. Clemens WWTP MI0023647 Lake Erie Clinton River Mt. Clemens website
Niles WWTP MI0023701 Lake Michigan St. Joseph River Niles website
North Houghton Co W&SA CSO MI0043982 Lake Superior St. Louis Creek; Douglas Creek  
Norway WWTP MI0020214 Lake Michigan White Creek Norway website
Oakland County - Acacia Park CSO RTB MI0037427 Lake Erie Rouge River Oakland County - ACACIA Park website
Oakland County - SOCSDS 12 Towns RTF (George W. Kuhn CSO RTB) MI0026115 Lake Erie Red Run Drain  
Port Huron WWTP MI0023833 Lake Erie St. Clair River; Black River Port Huron website
Redford TWP CSO MI0051829 Lake Erie Ashcroft-Sherwood Drain  
River Rouge CSO MI0028819 Lake Erie Rouge River  
Saginaw TWP WWTP MI0023973 Lake Huron Tittabawassee River Saginaw TWP website
Saginaw WWTP MI0025577 Lake Huron Saginaw River Saginaw website
Sault St. Marie WWTP MI0024058 Lake Huron St. Marys River; Edison Power Canal  
South Macomb SD Martin RTB MI0025453 Lake Erie Lake St. Clair  
Southgate/Wyandotte CSO RTF MI0036072 Lake Erie Trenton Channel  
St. Clair WWTP MI0020591 Lake Erie St. Clair River  
St. Joseph CSO MI0026735 Lake Michigan St. Joseph River  
Wakefield WWSL MI0021440 Lake Superior Planter Creek  
Wayne County/ Dearborn Heights CSO MI0051489 Lake Erie Middle Rouge; Upper Rouge River; Lower Rouge River Wayne County/ Dearborn Heights website
Wayne County/ Inkster CSO MI0051471 Lake Erie Lower Rouge River Wayne County/ Inkster website
Wayne County/ Inkster/ 
Dearborn Heights CSO
MI0051462 Lake Erie Lower Rouge River Wayne County/ Inkster/ 
Dearborn Heights website
Wayne County/ Redford/ 
Livonia CSO
MI0051535 Lake Erie Ashcroft-Sherwood Drain; Upper Rouge River; Bell Branch of Upper Rouge River Wayne County/ Redford/ 
Livonia website

The Michigan Department of Environmental Quality prepares annual reports summarizing CSO, sanitary sewer overflow and retention basin discharge information. 

Appendix A of the Report to Congress: Combined Sewer Overflows into the Great Lakes Basin has information on CSOs in communities in the Great Lakes Basin during 2014.

EPA’s Enforcement and Compliance History Online (ECHO) database has additional information on NPDES discharges, including CSO discharges for some facilities.

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