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 System Banner

Project videos

Video: First flow of clean test water to come into the Brightwater Plant from the Influent Pump Station in Bothell, 2.8 miles away! (May 2011) Brightwater Plant test (May 2011)
Video length: 17 seconds
Video: installation of membrane bioreactor filters (MBRs) at the treatment plant (April 2011).

Installation of membrane bioreactor filters (MBRs) at the treatment plant (April 2011)
Video length: 2 minutes, 32 seconds

Video: Earth Week at Brightwater Center (April 2011)

Earth Week at Brightwater Center (April 2011)
Video length: 2 minutes, 4 seconds

Smooth sailing for Brightwater outfall pipelines (September 2008)

Smooth sailing for Brightwater outfall pipelines (September 2008)
Video 1 length: 1 minute, 46 seconds
Video 2 length: 1 minute, 35 seconds

Brightwater treatment plant introduces tunneling equipment (September 2007) Brightwater treatment plant introduces tunneling equipment (September 2007)
Video length: 1 minute, 46 seconds
Brightwater habitat restoration tours, April 2007 Take a tour of the Brightwater habitat restoration (April 2007)
Video length: 4 minute, 16 seconds

External videos video

  • Brightwater sewer pipeline tunnel - 350 feet underground, crews repair a Tunnel Boring Machine in a pressurized environment similar to being 70 feet underwater.
    (Seattle Times, December 2009)

News releases

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