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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 System Banner

Brightwater Project

Project construction

 
Entrance to the Brightwater Center -- education and community center
The Brightwater Center is now open. The park grounds are open dawn to dusk everyday. The Brightwater Education and Community Center is open to the public Monday-Thursday 10 a.m. - 4 p.m.   

Video: installation of membrane bioreactor filters (MBRs) at the treatment plant (April 2011)
Video: Installation of membrane bioreactor filters (MBRs) at the treatment plant
 (April 2011) 

systemflows_200
Brightwater will serve portions of King and Snohomish counties.

In response to increased growth in our region, King County is constructing a new regional wastewater treatment plant, called Brightwater. Construction started in 2006. Treatment plant start-up and operations began in September 2011, with the entire system scheduled to be completed in 2012.

Brightwater will serve portions of King and Snohomish counties and support our mission to protect public health and the environment. The new facilities will include a treatment plant, conveyance (pipes and pumps taking wastewater to and from the plant), and a marine outfall.

This Web site provides information about the project, including:

Odor Control at Brightwater

Brightwater Operations

Entrance sign to the Brightwater Treatment Plant
After more than a decade of planning and construction, local dignitaries and community members joined King County Executive Dow Constantine on Saturday, Sept. 24th to celebrate an extraordinary regional investment in clean water with the start of Brightwater Treatment Plant operations.
video View video.

News releases

Related information

Contact us if you need more information about Brightwater.

King County Brightwater Project

22505 State Route 9
Woodinville, WA 98072
E-mail: Brightwater
Phone: 206-263-9453
TTY Relay: 711

For construction-related questions and urgent issues, please contact the Brightwater construction information line at 206-205-5989.

Driving directions to Brightwater project office.