King County Vashon Wastewater operates the Vashon Treatment Plant on Vashon Island, providing critical wastewater treatment services to homes and businesses in the area. With the capacity to treat up to 1.4 million gallons of wastewater and stormwater per day, the plant plays a key role in maintaining environmental sustainability on the island.
In addition to the Vashon Treatment Plant, King County also manages the Beulah Park Plat Wastewater Treatment System, serving several dozen households with a community septic system. Through a series of septic tanks, sand filters, and ultraviolet disinfection, wastewater is treated before being pumped to the Beulah Park drain field, showcasing the county's commitment to efficient and responsible wastewater management.
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