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.
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.
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.
What is a wastewater pump station and how does it work? King County celebrates the completion of the King County Kirkland Pump Station and its upgraded capacity to provide safe, reliable wastewater operations for the City of Kirkland's growing population.