The Brightwater plant is an advanced treatment facility that uses a membrane bioreactor system.
By combining standard biological wastewater treatment with membrane filters, the process produces higher quality water that is seven to ten times cleaner than typical secondary treated wastewater.
- Treatment process diagram (updated in 2018)
- Technical facts - English and Metric (to be provided)
- NPDES permit
Digester—solids biological treatment
View more photos on our Flickr site .
24 hour emergency and odor reporting: 206-263-9500
22505 State Route 9 S.E.
Woodinville, WA 98072-6010
Achieving Brightwater’s air quality standards remains a top priority for King County’s Wastewater Treatment Division. Since September 2011, when the treatment plant began operation, it has operated continuously without generating odors. Odor monitoring has confirmed that the plant is achieving the “no odor” standards agreed to in our permits.
Brightwater is establishing itself as a good neighbor, and air quality standards go beyond the public’s ability to detect nuisance odors. King County measures Brightwater’s air quality performance using equipment put in place to detect emissions of ammonia and hydrogen sulfide, or H2S, which produces the unpleasant “rotten egg” smell typically associated with sewage.
Learn more: download Brightwater odor control fact sheet (June 2014)
People can report odor concerns 24/7 by calling 206-263-9500.