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Wastewater Treatment

King County, Washington

For questions about the Wastewater Treatment Division website, please send an e-mail message or contact us at:

King Street Center
201 S. Jackson St., Suite 500
Seattle, WA 98104-3855
Phone: 206-477-5371
Fax: 206-684-1741
Telecommunication device for the deaf (TTY): 711

Get Directions to our office location in Seattle, Washington.

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West Point Treatment Plant

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West Point treats wastewater from homes and businesses in Seattle, Shoreline, north Lake Washington, north King County and parts of south Snohomish County. Seattle’s combined stormwater/wastewater sewer system also flows into West Point. Approximately 90 million gallons a day of sewage is treated at this facility during the dry months and up to 440 millions of gallons can be treated during the rain/storm season.


West Point Treatment Plant Sewer News

Towing sign at West Point
Towing of illegally parked vehicles in the emergency access areas adjacent to the beach area at West Point Treatment Plant begins on April 6, 2015. Learn more.

Contact us

24-hour emergency and odor reporting: 206-263-3801
Administration: 206-263-3800

1400 Discovery Park Blvd Seattle WA 98199
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