Wastewater Treatment Division
King County, Washington
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
Flushable: wipes are not really flushable – they don’t break down and can cause expensive plumbing problems in your home and damage the sewer system. Put wipes in the trash. Learn more.
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:
Regional wastewater treatment plants
MWPAAC - Metropolitan Water Pollution Abatement Advisory Committee
RWQC - Regional Water Quality Committee
View more WTD news releases.