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West Point Treatment Plant
Find information and facts about West Point Treatment Plant located next to Discovery Park in Seattle, including the treatment process, capital and improvement projects, and ongoing public engagement.
Portion of Miracle Beach closed as precaution after treated water overflows near West Point Lighthouse
December 1, 2025
After consulting the Washington State Department of Ecology, Public Health - Seattle & King County has updated its recommendation and reduced the beach closure area on Miracle Beach, just south of the West Point Lighthouse at Discovery Park in Seattle. The closure area now covers about 560 feet of shoreline.
People and pets should avoid the area marked with signs in the red-shaded section shown on the map below. The public should also avoid any standing water on the ground and from nearby stormwater drains.
The closure remains in effect through noon on Dec. 5, 2025.
Our Community Services team are adjusting the signage today to reflect Public Health’s updated guidance.
For more information, please visit our Incident Response page.
Located next to Discovery Park in Seattle, West Point Treatment Plant (West Point) began operating in 1966. West Point cleans more wastewater each day than any other plant in Washington. Approximately 90 million gallons of wastewater per day are treated at the facility during the dry months. Seattle’s combined stormwater/wastewater sewer system also flows into West Point. West Point serves homes and businesses in Seattle, Shoreline, north Lake Washington, north King County, and parts of south Snohomish County.
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- Learn how West Point's treatment process works.
- Get the facts on the West Point's operations.
- Discover how West Point contributes to a sustainable future for the surrounding community and environment.