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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.

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


Local sewer agencies

King County online directory

Public Records Officers 

Department of Natural Resources

Public Health - Seattle and King County

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Get information, news, and alerts via email or text message from King County Wastewater Treatment Division.