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…

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…

Well KEPT youth employees wear masks and safety vest as they help build a trail detour

Building a path for the future during a challenging time

At King County Wastewater Treatment Division (WTD), we consider it a win whenever we can partner with local agencies and organizations to accomplish a goal. In 2021, WTD’s partners at City of Bellevue Parks navigated the ongoing pandemic to create a big win for trail users and youth employment. WTD’s Coal Creek Sewer Upgrade Project…

Green stormwater infrastructure & CSOs: In-depth media coverage

King County is working to control all our combined sewer overflows (CSOs) through several strategies. One way we are reducing CSOs is through natural drainage solutions, also known as green stormwater infrastructure (GSI), which use plants, trees, and soil to soak up the rain.These solutions help our neighborhoods manage stormwater naturally and on-site, and compliment…

A rain garden showing a shallow depression in the ground, with mulch, rocks, and plants

Celebrating RainWise pollution prevention milestones in the King County basin

As the days get shorter and we anticipate more rain in our forecast, we are celebrating a timely milestone—we just mailed our 1,000th RainWise rebate check in one of the eligible combined sewer overflow basins! Our utility strives to prevent pollution from entering our local waterways, and one way we are doing this is through…

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…

Green roof at Sunset Pump Station

Making projects sustainable, resilient, and equitable

King County’s Wastewater Treatment Division (WTD) is being recognized for its commitment to sustainable communities and the environment. WTD’s Sunset / Heathfield Pump Stations and force main upgrade project was awarded an Envision® Silver Award this month for project sustainability. This is the second Envision-certified project for the region’s wastewater utility. In 2018, King County’s…

Aerial view of the West Point Treatment Plant

Charging ahead with reliable battery power for West Point Treatment Plant

The West Point Treatment Plant processes about 100 million gallons of wastewater each day, and up to 440 million gallons during heavy rains. While the plant’s operators are working hard to keep the treatment process flowing smoothly, a momentary lapse of power supply quality can bring vital equipment operations to a hard stop.   That’s why in February 2021, King County Executive Dow Constantine signed an emergency declaration and the King County Council authorized up to $65 million to provide West Point with more reliable power. The team…