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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.
November 29, 2025
Portion of Miracle Beach closed as precaution after treated water overflows near West Point Lighthouse
Public Health - Seattle & King County (Public Health) has evaluated the incident and recommends closing about 1,800 feet of Miracle Beach, just south of the West Point Lighthouse at Discovery Park in Seattle.
Because the water that overflowed was fully treated and disinfected, Public Health has determined that water sampling is not needed. However, out of an abundance of caution Public Health is recommending the closure.
People and pets should avoid the red-shaded area shown on the map below. The public should also avoid any standing water on the ground and from nearby stormwater drains.
Our Community Services team posted signs in the area today, Saturday, Nov. 29.
The closure will be in effect through noon on Dec. 5, 2025. The Public Health recommendations may change as more information becomes available.
King County crews continue to work onsite and have eliminated the flooding issue.
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.