Water sustains all

(Thales of Miletus, 600 B.C.)

The Seattle Water Supply Operating Board is a board of representatives who have certain limited authority over policy and operational matters as they affect the Seattle Regional Water Supply System. These representatives pledge to represent the best interests of the region in order to provide overall direction to the Administrator of the Seattle Regional Water Supply System.

The water supply system consists of two surface watersheds, the Cedar River, South Fork Tolt River, two wellfields, transmission mains, pumps, treatment facilities and other pertinent infrastructure necessary to operate this regional water supply system.


Operating Board Members

  • Cedar River Water & Sewer District
  • City of Bothell
  • City of Duvall
  • City of Mercer Island
  • City of Renton
  • City of Seattle
  • Coal Creek Utility District
  • Highline Water District
  • King County Water District # 20, 49, 90, 119 and 125
  •  Northshore Utility District
  • Olympic View Water & Sewer District
  • North City Water District
  • Soos Creek Water & Sewer District
  • Woodinville Water District

The Operating Board consists of Seattle and 18 cities and districts that have signed a 60-year contract with the City of Seattle for a Full, Partial or Block supply of water.


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