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

King Street Center
201 S. Jackson St., Suite 500
Seattle, WA 98104-3855
Phone: 206-684-1280
Fax: 206-684-1741
Telecommunication device for the deaf (TTY): 711

Get Directions to our office location in Seattle, Washington.

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

Our agency and staff

King County staff at dedication of Carnation Treatment Plant, June 2008.

primary tank west

King County Environmental Laboratory staff

Point Wells benthic survey

Headquartered in downtown Seattle, King County's Wastewater Treatment Division has been committed to protecting and improving water quality for more than 40 years. The agency employs about 600 people who plan, design, build and operate treatment facilities.

Our employees also enforce regulations to reduce harmful waste discharged to the system, and we educate the public and businesses on ways to protect water quality.

To our agency, success means clean water. It means honoring our legacy while keeping a promise to another generation that our beautiful environment will be there for them to enjoy.

It also means being accountable to our ratepayers and operating a well-managed agency.

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