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Heavy rains cause overflow into Lake Washington from King County’s Medina Pump Station


King County Wastewater Treatment Division’s Medina Pump Station experienced an overflow as a result of heavy rains in the service area on Friday, Dec. 20. The pump station was operating properly but flows exceeded station capacity, and an overflow occurred for approximately four hours.


King County reported a sewer overflow at the Medina Pump Station on Friday Dec. 20, as a result of the powerful storm that dumped record amounts of rain across the county.

Located at NE 8th Street and 81st Avenue Northeast, the pump station was operating at full function. Large volumes of rain exceeded the capacity of the pump station, and an overflow occurred from approximately 2:30 p.m. to approximately 6:30 p.m.

King County notified health and regulatory agencies, is testing water quality and has posted signs at Medina Park Beach 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 1.7 million residents across a 420-square-mile area in King, Snohomish and Pierce counties.