King County, Washington, protects water quality and prevents water pollution by providing wastewater treatment to 17 cities and 17 local sewer utilities. The county's Wastewater Treatment Division serves about 1.5 million people, including most urban areas of King County and parts of south Snohomish County and northeast Pierce County. More about our system and facilities.
Learn how King County Wastewater Treatment Division creates safe underground
work environments using a construction technique called secant piles.
Start your RainWise project today! Get ready for spring! The RainWise program provides rebates that cover most or all of the cost of installing cisterns and rain gardens on your property. To receive a rebate, you must live in an eligible combined sewer overflow basin. Learn more.
We are smart about energy. Learn more about the energy we use as we clean your wastewater from our infographic.
What do you know about jobs related to clean water and sanitation? Watch these short videos and learn about the role of laboratory specialists, operations staff, and maintenance staff in protecting human health and the environment every day.