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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

Get Directions to our office location in Seattle, Washington.

Staff Contacts

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

South King County Projects

Black Diamond wastewater storage facility 

The county is continuing design on an underground wastewater storage facility in the City of Black Diamond that will extend the life of existing equipment and defer the need to build additional new conveyance pipes and pumping facilities for several years.

Kent/Auburn conveyance system improvement 

This project will expand capacity in the rapidly growing south portion of King County’s service area by adding approximately five miles of pipes in Kent, Auburn, Algona and Pacific. The county will complete final design and advertise the first phase for construction in 2009.

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