Holiday closure Monday May 28: Most county offices will be closed in observance of Memorial Day.

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

Regionwide Projects

Reclaimed Water Comprehensive Plan 

In 2010, the county is continuing to develop a comprehensive plan to guide King County's reclaimed water program and identify potential projects to make highly treated wastewater available for non-drinking purposes such as irrigation or industrial uses.

Regional Infiltration and Inflow Control Program Implementation

During 2011, King County is partnering with a local sewer agency (Skyway) to repair leaky pipes in their system to keep stormwater and groundwater out of regional treatment facilities. Controlling the infiltration and inflow can reduce demand for treatment and conveyance capacity, saving ratepayers money.

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