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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: 206-684-1280
Fax: 206-684-1741
Telecommunication device for the deaf (TTY): 711

Get Directions to our office location in Seattle, Washington.

Staff Contacts

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

Vashon Treatment Plant

Address and contacts

Administration: 206-463-7318
Monday through Friday, during business hours
Odor Control Hotline: 206-684-2404
24 hours a day

9615 SW 171st Street
Vashon, WA 98070

VashonMap_150
Driving Directions
to the Vashon Treatment Plant

and other King County wastewater facilities

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