West Point Treatment Plant
Constructed in 1966, West Point treats wastewater for about 670,000 people in the Seattle and Shoreline areas.
Prior to the construction of West Point, Seattle’s raw sewage flowed directly into the Puget Sound.
West Point historical timeline of the site
West Point was significantly expanded in the early 90’s to provide secondary treatment. Learn more: Steward of the waters, a retrospective on wastewater treatment at Seattle's West Point , December 1995.
Regional system history
In 1958 voters approved a plan for a regional wastewater treatment system to clean the wastewater being generated from the developing cities. Metro was formed as the organization to build and manage this system and was later merged with King County. More regional wastewater system history.
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