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Our Duwamish

King County supports a Duwamish River cleanup that will protect people’s health, safeguard 100,000 family-wage industrial jobs and ensure environmental justice for those who live and work nearby. And we’re already taking action.

EPA’s cleanup decision

The U.S. Environmental Protection Agency, or EPA, issued a Record of Decision on Lower Duwamish Superfund cleanup in December 2014.


Frequently asked questions and other information on the Our Duwamish web pages have been translated into SpanishVietnamese and Somali.

Spanish Vietnam Somali

Learn more

Source Control Study: Air Deposition of Chemicals in the Green/Duwamish Basin (fact sheet, pdf). Learn more about source control studies.  

Fly over the Duwamish River and see King County’s major facilities and services

Green-Duwamish Watershed (WRIA 9)

Executive Constantine's Green-Duwamish Watershed Strategy

What's the best way to clean up the river?

For more information about the Duwamish environmental cleanup process, please contact Annie Kolb-Nelson, WTD Media Lead.

Voices of Community Video. Residents talk about why they live near the Lower Duwamish Waterway and share their vision for the neighborhood’s future.