Holiday closure Monday May 28: Most county offices will be closed in observance of Memorial Day.
For questions about the Duwamish Waterway Programs, please contact Doug Marsano

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.

The Duwamish Waterway... running towards a brighter future

Put trash in a trash can, not the toiletHow can I help the Duwamish?

Put trash in a trash can, not the toilet

Why put trash in a trash can, not the toilet? Trash, hair and grease in the sewer pipes create overflows which can harm human health and the Puget Sound. Wastewater treatment plants use natural processes to turn dirty water into clean water and fertilizer before it is returned to the environment. Not all chemicals found in medicines, cleaners and personal products can be removed during treatment.

How to dispose of trash properly:

What you can do video, from the 2009 Duwamish River Festival:

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Windows Media format, video length 3 minutes;
Produced by King County TV