Sediment management

Areas of contaminated sediments exist near some King County CSOs. Most of this contamination is historical, as the county's Industrial Waste Program and CSO Control Program have dramatically reduced pollutants from CSOs. However, the state Department of Ecology has listed several sites in the Duwamish River near CSOs and stormwater outfalls as possible contaminated areas. To deal with sediment issues, King County is partnering with other agencies and organizations to clean up contaminated sites.

More about King County's Sediment Management Program.