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For West Point Treatment Plant updates, visit the plant restoration page.

Our regional wastewater treatment system has a big job to do. Not only does it operate around the clock to sustain a healthy environment, this vital infrastructure supports economic development that enables our region to thrive.

Learn about what makes WTD a Utility of the Future Today and our vision, mission and values.

soundguardianKing County has launched a multimedia platform to bring people on a virtual tour of the Environmental Laboratory's marine monitoring runs. Learn about our field scientists' decades-long work to monitor the health of Puget Sound.
West Point Treatment Plant, Seattle
Regional wastewater treatment plants

Brightwater, near Woodinville
South Plant, Renton
West Point, Seattle

Regional committees

MWPAAC - Metropolitan Water Pollution Abatement Advisory Committee

RWQC - Regional Water Quality Committee

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Local sewer agencies

King County online directory

Public Records Officers 

Department of Natural Resources

Public Health - Seattle and King County

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