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Brightwater Treatment Plant
Find information and facts about Brightwater Treatment Plant located near Woodinville, including the treatment process, capital and improvement projects, and visiting the facility and grounds.
August 2024
Brightwater is part of King County’s regional wastewater system and serves parts of north King County and south Snohomish County.
The drier months are a wonderful time to visit the Brightwater trails area and prepare for the rainy season ahead. This is also a good time for King County Wastewater Treatment Division (WTD) to maintain our facilities and work on projects in and around the Brightwater Treatment Plant.
Read our August email to learn more about restoration work in the trails area, what you can do to prepare your home for the rainy season, and more!
Visit Brightwater’s Public Engagement web page to read past emails, newsletters, and blog stories related to Brightwater. Our 2024 Brightwater newsletter is available in English, Español (Spanish), 中文 (Chinese, Simplified), 正體字 (Chinese, traditional), and Русский (Russian).
Located just north of Woodinville, Brightwater Treatment Plant (Brightwater) began operating in 2011. It is our newest regional wastewater treatment facility and features an educational and event center, natural areas and hiking trails, and public art. Brightwater treats an average of 36 million gallons of wastewater per day from communities in northeast King County and southeast Snohomish County. The facility is nationally recognized for its award-winning design and its consistent compliance with state and federal discharge limits.
Learn more
- See how Brightwater’s Treatment System works.
- Get facts about Brightwater's operations.
- Learn how Brightwater contributes to a sustainable future for the surrounding community and environment.
- Explore educational opportunities, trails, and natural areas.