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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.

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.