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 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
CITY HOME
RESIDENTS
SSO Discharge Location 
CSO Discharge Location 
SSO/CSO Discharge Location