Aerial photos of the five treatment plants

Celebrating our award-winning treatment plants

All five of King County’s wastewater treatment plants received 2021 National Association of Clean Water Agency’s (NACWA) Peak Performance Awards, honoring multiple consecutive years of compliance with state and federal effluent permit limits. Special congratulations go to Brightwater for earning its first Platinum award for five years of compliance – and to Vashon for Platinum…

The Georgetown station as viewed from the intersection.

The first Envision Platinum sustainability award in the state

King County’s Georgetown Wet Weather Treatment Station (WWTS) earned the coveted “Platinum” designation from the Institute for Sustainable Infrastructure’s Envision rating system. This is the first Platinum-awarded Envision project in Washington and recognizes the County’s commitment to sustainable communities and the environment. The Georgetown WWTS project in Seattle’s Georgetown neighborhood will treat up to 70…

Two men in hardhats and safety clothing stand smiling at the camera. A railing and trees are in the background.

If you live in the City of Carnation, do you know where water goes after you send it down the drain?

Unless you use a septic system, the water you send down the drain in the City of Carnation travels through pipes owned and maintained by the City of Carnation to King County’s Carnation Treatment Plant. At this plant, we process about 111,000 gallons of wastewater every day. After we treat the water, we release it…

A person in a orange safety slicker and navy blue pants sweeps with a broom around concrete structures and industrial equipment

How King County businesses help protect public health & the environment through our Industrial Waste program

Staff at our King County wastewater treatment plants do an excellent job of cleaning wastewater, but not all types of waste can be filtered out during the treatment process. Our Industrial Waste Program is in charge of preventing pollution from entering the wastewater system in the first place. That’s also where local business can make…

A woman wastewater operator in a orange safety shirt, mask, gloves and googles, holds up water samples

Wastewater could be a great career for you & we will PAY & train you to find out!

Operators work hands-on, out at our treatment plants Operators watch over large and complex industrial equipment and the flows going through them – from both on-the-ground and from computer monitoring systems. They check readings and take water samples to make sure things are running smoothly – troubleshooting when necessary. They often work as part of…

A wastewater operator sits facing away from us, in front of multiple computer screens that help monitor the treatment plant processes

As rainy weather approaches, we are on the job 24/7

Our crews are on the job 24/7, 365 days a year to ensure the region’s wastewater treatment service – and that remains true as we move into the rainy season. Workers are ready to respond around the clock and work hard to be well-prepared for stormy weather or an emergency. To make sure we’re ready…

Banner with a photo of Lake WA and Mt Rainier and text that says construction in Mercer Island & Bellevue to start early 2022

Major construction in Mercer Island & Bellevue to start early next year

Our relationship to water is what makes this region special.  King County is a partner in this relationship. Regional wastewater treatment plays a key role in keeping our rivers, lakes, streams, and the Puget Sound clean for people and aquatic life. We manage a big regional wastewater system that needs regular inspection, maintenance, and upgrades…