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Combined Sewer Overflow

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 Program Contacts

Program Manager
216.201.2000 ext 
Megan Symanski MA, RS
216.201.2000 ext 1248


A combined sewer is designed to transport both stormwater and sewage in the same pipe. Normally, all of this wastewater and rainwater flows together to a wastewater treatment plant, where it is treated and released back into the environment. However, during times of heavy rainfall or snow melt, the capacity of the combined sewer system may be exceeded, causing untreated wastewater and stormwater to be released into a stream, river, or lake through a combined sewer overflow (CSO).

Many large cities, like Cleveland, still utilize combined sewers that were installed many years ago. When these sewers overflow into our local water bodies, they can cause significant water pollution and lead to beach closings.


Local CSO Notifications

Northeast Ohio Regional Sewer District
Main number – 216.881.6600
Customer Service – 216.881.8247


City of Euclid
Laura Travers


City of Lakewood
Engineering & Construction


For more information:

Ohio Environmental Protection Agency

United States Environmental Protection Agency