City of Bellevue                     City of Issaquah

City of Redmond                   City of Tukwila

Covington Water                  Sammamish Plateau Water & Sewer District

City of Kirkland                     Skyway Water & Sewer District

Saving Water  Partnership

City of Bothell                        City of Mercer Island  

Coal Creek Utility District    City of Woodinville

City of Duvall                          Northshore Utility District 

Highline Water District         Olympic View Water & Sewer District

Seattle Public Utilities          Woodinville Water District

Shoreline Water District

Water Districts 20, 45, 49, 90, 119 and 125

Cedar River Water & Sewer District

Soos Creek Water & Sewer District