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Heavy rains cause overflows into Lake Washington from King County’s Kirkland and Medina pump stations


King County Wastewater Treatment Division’s Kirkland and Medina pump stations experienced overflows as a result of heavy rains in the service area. The pump stations are operating properly but flows are exceeding station capacity, and the overflows are expected to end when flows subside.


King County reported sewer overflows into Lake Washington from the Kirkland and Medina Pump Stations on Monday, Dec. 21, as a result of a powerful rainstorm that has dumped nearly three inches of rain across most of the county.

Both Kirkland and Medina pump stations are operating at full function. Large volumes of rainfall throughout the day exceeded the capacity of the pump stations, and overflows began in the evening.

King County has notified health and regulatory agencies, will test water quality and has posted signs at Kirkland and Medina Park Beaches warning people to avoid contact with the water over the next several days as a precaution to protect public health.

Updates will be posted at in the DNRP Newsroom.

Marie Fiore, 206-263-0284 or

About the King County Wastewater Treatment Division
King County’s Wastewater Treatment Division protects public health and enhances the environment by collecting and treating wastewater while recycling valuable resources for the Puget Sound region. The division provides wastewater treatment services to 17 cities, 17 local sewer districts and more than 1.8 million residents across a 420-square-mile area in King, Snohomish and Pierce counties.