For questions about the Wastewater Treatment Division Web site, please send an e-mail message or contact us at:

King Street Center
201 S. Jackson St., Suite 505
Seattle, WA 98104-3855
Phone: 206-684-1280
Fax: 206-684-1741
Telecommunication device for the deaf (TTY): 711

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Puget Sound shoreline next to the West Point Treatment Plant, Seattle

Wastewater Treatment Division

King County, Washington, protects water quality and prevents water pollution by providing wastewater treatment to 17 cities and 17 local sewer utilities. The county's Wastewater Treatment Division serves about 1.5 million people, including most urban areas of King County and parts of south Snohomish County and northeast Pierce County. More about our system and facilities.

Spotlight

WateReuse Symposium Logo
King County is a general conference sponsor for the 24th Annual WateReuse Symposium, Sept. 13-16. Advance registration ends August 31. Register today!

Flushing wipes may cost you,
They're handy, tidy and a great way to clean up messes and prevent germs, but if you don't dispose of them correctly, they can be a costly convenience. August 18, 2009, NWCN.com

The county's wholesale monthly sewer rate will remain at $31.90 for 2009-2010. Effective Jan. 1, 2010, the monthly capacity charge for new connections will increase from $47.64 to $49.07. View June 16, 2009 news release.

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