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

King Street Center
201 S. Jackson St., Suite 505
Seattle, WA 98104-3855
Phone: 206-684-1280
Fax: 206-684-1741
Telecommunication device for the deaf (TTY): 711

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Staff Contacts

Puget Sound shoreline next to the West Point Treatment Plant, Seattle

Vashon Treatment Plant

History

Vashon Sewer District contracted with King County in 1999 to treat the wastewater of its customers. Then, the system was experiencing many violations. King County's expertise in wastewater treatment and financing was needed to solve serious problems.

Vashon Beach
The new plant is doing an excellent job of protecting the Puget Sound and
Vashon's beaches.

After taking over treatment plant operations in November 1999, the county carried out many interim steps to improve the plant. While the old plant was doing an adequate job, it was at capacity for the amount of incoming waste and flows. The old plant lacked backup systems.

The treatment plant upgrade was completed in fall 2006 and a dedication ceremony was held in May 2007. In addition to the treatment plant upgrades, the County advanced funds to the sewer district to build facilities to deal with health hazard areas at Bunker Trail and Beulah Park/Cove.

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