Combined Sewer Overflows in the Great Lakes Basin-Pennsylvania

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There is one NPDES permit for CSO discharges in the Great Lakes Basin in Pennsylvania. The table below provides information about that permittee and a link to the CSO website and Annual Notice describing the CSO discharges that occurred in 2023.

Map of CSO communities in Pennsylvania that drain to the Great Lakes Basin
Municipal Operator of CSO NPDES Permit Number Great Lake Discharged To Water Body Directly Discharged Into Website Annual CSO Notice
City of Erie PA0026301 Lake Erie Lake Erie Erie website Erie annual notification (pdf) (24.6 MB)

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

National Pollutant Discharge Elimination System (NPDES)

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Last updated on May 23, 2025