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For questions about the King County CSO Control Program, please contact Karen Huber.

Wastewater Treatment Division
King Street Center
201 S. Jackson St., Suite 505
Seattle, WA 98104-3855

Get Directions to our office location in Seattle, Washington.

Real Time CSO Notification

King County CSOs -- West Seattle

Please refer to the legend below the map to determine CSO status and take note of the data limitations and other information listed in the right-hand column.

Annual reporting of CSO discharges (number of times and the volume of the discharge) is available in King County's Annual CSO reporting to the Department of Ecology.

Combined Sewer Overflow Locations: West Seattle

About this map

The CSO status information on this page is updated every 10 minutes.

Data displayed on this map has not been reviewed by King County. King County reviews all CSO data on a regular basis and determines if an overflow truly occurred at a location.

Maintenance or equipment malfunction may show a false CSO discharge. Official data is available in King County's Annual CSO reporting to the Department of Ecology.

This map does not show information for the 90 City of Seattle CSOs.

The purpose of this Web page is to give the public the opportunity to make decisions about the use of waterways during heavy rains. CSOs usually discharge in the winter between October and May. During the CSO discharge and for 48 hours following the discharge, water users near the CSO locations are at risk from exposure to bacteria in the water.

We want your feedback

This is a pilot program that we are continually trying to improve and make useful. Please let us know how this is working for you and any comments or suggestions you may have.