Wastewater Treatment Division
King County, Washington
Our regional wastewater treatment system has a big job to do. Not only does it operate around the clock to sustain a healthy environment, this vital infrastructure supports economic development that enables our region to thrive.
Wastewater Treatment Division (WTD) and Novel Coronavirus (COVID-19)
WTD operations staff remain on the job 24/7 to ensure the region’s wastewater treatment service continues. Following the guidance of Seattle-King County Public Health, our offices are closed to the public and all facility tours are suspended until further notice. Please check back in May for updates.
For questions about COVID-19, we encourage people to visit the Public Health – Seattle & King County website: www.kingcounty.gov/covid and subscribe to the Public Health Insider blog: www.publichealthinsider.com
Wet weather resiliency
We are continually working to make our operations more resilient during winter storms in wet weather season, and making improvements at our West Point Treatment Plant.
We currently have major projects underway to improve our wastewater treatment system, including:
- Georgetown Wet Weather Treatment Station
- Lake Hills and NW Lake Sammamish Sewer Upgrade
- North Mercer Island/Enatai Sewer Upgrade
- Ship Canal Water Quality (joint project with Seattle Public Utilities)
See how our system works:
Here are some quick navigation links:
Clean Water Plan - join the conversation
Pay capacity charge
Rent a Brightwater Center room
View CSO discharge status in Seattle area
Join in education & tours
Report a problem
View capital projects
Learn about finances & rates
View more services
Regional wastewater treatment plants
Brightwater, near Woodinville
South Plant, Renton
West Point, Seattle
Regional committees
MWPAAC - Metropolitan Water Pollution Abatement Advisory Committee
RWQC - Regional Water Quality Committee
Resources
WTD career opportunities and internships
Department of Natural Resources
Clean Water Healthy Habitat: Based on science, focused on outcomes from King County Executive on Vimeo.