About
Located just north of Woodinville, Brightwater Treatment Plant (Brightwater) began operating in 2011. Brightwater is part of King County’s regional wastewater treatment system. In addition to treating wastewater, Brightwater features an education and event center, natural areas and trails, and public art.
Brightwater serves around 300,000 people and businesses in north King and south Snohomish Counties. On average, Brightwater treats around 20 million gallons of wastewater (mgd) per day. During peak flows when we get a lot of rain, Brightwater treats around 35 mgd.
Brightwater operates all day, every day to protect public health and the environment. The facility is nationally recognized for its award-winning design and its consistent compliance with state and federal discharge limits.
Additional Information:
- Learn more about Upcoming Events at Brightwater and other facilities.
- Learn about jobs, training programs, and internships at WTD.
- Learn more about the Brightwater Treatment Plant.
Questions? Email us at Brightwater@kingcounty.gov.