King County Wastewater Treatment Division

A graphic with trees that shows how the Treatment Planning Program intersects with other parts of our utility's business

Infrastructure Operations

January 24, 2022

Planning ahead to treat wastewater

We have some of the largest wastewater treatment plants in the country. It takes a decade or more to build large wastewater projects, so it’s important we plan ahead. That’s where our planning staff and programs come in.

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A worker in a safety vest, hardhat, and mask, inspects the magnesium hydroxide tank at the Brightwater treatment plant. The person is standing on blue scaffolding above the big, white tank

Infrastructure Operations

January 18, 2022

Fine tuning wastewater treatment

Over the last year and a half, staff at our Brightwater Treatment Plant in Woodinville optimized the treatment process in a way that improved staff safety and the performance of the membrane filters.

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

Community Infrastructure People

December 2, 2021

Building a path for the future during a challenging time

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.

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People planting plants in a rain garden lined with mulch

Community People

November 17, 2021

WaterWorks grants $5 million to community water quality improvement projects for 2022-23

68 projects aimed at protecting and improving regional water quality will be launched in the new year, thanks to funding through King County’s WaterWorks Grant Program.

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Students in the Clean Water Ambassador teen intern program stand in front of a building with masks on

Community

November 15, 2021

Wastewater education team wins award for inclusive youth employment

King County Wastewater Treatment Division was presented with the Youth Employer of the Year Award from the Governor’s Committee on Disability Issues and Employment on October 26, 2021.

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Community

November 8, 2021

Green stormwater infrastructure & CSOs: In-depth media coverage

King County is working to control our combined sewer overflows through several strategies. One way we're reducing CSOs is through natural drainage solutions, also known as green stormwater infrastructure, which use plants, trees, and soil to soak up the rain.

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

Community

October 25, 2021

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!

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

Operations

October 12, 2021

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.

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

Community Infrastructure Operations

September 29, 2021

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

If you live, play, work, or drive on Mercer Island, or if you live or recreate near Enatai Beach Park or Mercer Slough, you will see our construction activities over the next few years.

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Interns removing blackberries (invasive species) at White Center Heights Park

Community

September 24, 2021

Clean Water Interns & Accessibility

Since 2016, our utility’s education team has partnered with the Mountains to Sound Greenway Trust to lead the Clean Water Ambassador youth internship program.

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Puget Sound view from the SoundGuardian boat

Operations

September 20, 2021

Reducing nitrogen in Puget Sound where it matters

King County is committed to protecting water quality and reducing harm to fish and aquatic life in Puget Sound’s shallow bays caused by human sources of nitrogen.

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Infrastructure

September 15, 2021

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.

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Clean Water Stories

from King County

Planning ahead to treat wastewater

Fine tuning wastewater treatment

Building a path for the future during a challenging time

WaterWorks grants $5 million to community water quality improvement projects for 2022-23

Wastewater education team wins award for inclusive youth employment

Green stormwater infrastructure & CSOs: In-depth media coverage

Celebrating RainWise pollution prevention milestones in the King County basin

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

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

Clean Water Interns & Accessibility

Reducing nitrogen in Puget Sound where it matters

Making projects sustainable, resilient, and equitable

Clean Water Stories

from King County

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