Holiday closure Monday May 28: Most county offices will be closed in observance of Memorial Day.

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

Brightwater Treatment Plant – a clean water treatment facility

How to contact us

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Administration: 206-263-3800 (Monday through Friday, during business hours)
Odor Control Hotline: 206-263-9500 (24 hours a day)

22505 State Route 9 S.E.
Woodinville, WA 98072-6010

View directions and map to Brightwater Center.

Odor control at Brightwater

  • If you have an odor concern, please call 206-263-9500

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