Sewer Overflow Discharge Information
The following Geographic Information System map shows known Combined Sewer Overflow
(CSO) and Sanitary Sewer Overflow (SSO) discharge locations along various waterways
and overflow information at these locations from the Columbus sewer system. CSOs
are discharges of a combination of stormwater and wastewater from the city�s older
combined sewer system. SSOs are discharges of wastewater from the sanitary sewer
system, typically during wet weather when flows may temporarily exceed capacity.
For general information about SSOs and CSOs, please visit our
Frequently Asked Questions about SSOs and CSOs
web page.
To avoid any possible health effects from a sewer overflow, please avoid contact
with the water near an SSO or CSO discharge location, particularly after a rain
storm. This includes activities such as boating, wading, fishing and swimming. Be
aware that swimming in local waters is prohibited by Columbus City Code and is also
considered a dangerous drowning risk in many areas due to low-head dams and utility
crossings. Signs are posted along local waterways identifying the sewer discharge
locations. For more information on possible health and environmental impacts of
overflows, please visit
the following U.S. EPA web site.
The discharge data available on this web site is based on consent decree requirements
and is updated at least once per month, usually after the 15th, to reflect any known
activity for the previous month. Posting of data for SSOs began in 2004 and CSO
data began in 2005.
To report a suspected overflow, please call the 24-hour Sewer Maintenance Operations
Center at (614) 645-7102
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 SSO Discharge Location
 CSO Discharge Location
 SSO/CSO Discharge Location
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