Combined Sewer Overflows in the Great Lakes Basin-Wisconsin
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There are two NPDES permits for CSO discharges in the Great Lakes Basin in Wisconsin. The table below provides information about those permittees and links to their CSO website and Annual Notice describing the CSO discharges that occurred in 2023.
The following links exit the site
| Municipal Operator of CSO | NPDES Permit Number | Great Lake Discharged To | Water Body Directly Discharged Into | Website | Annual CSO Notice |
|---|---|---|---|---|---|
| Milwaukee | WI0036820 | Lake Michigan | Lake Michigan | Milwaukee website | Milwaukee annual notice |
| Superior | WI0025593 | Lake Superior | Lake Superior | Superior website | Superior annual notice (pdf) (109 MB) |
EPA’s Enforcement and Compliance History Online (ECHO) database has additional information on NPDES discharges, including CSO discharges for some facilities.