King County, Washington — public water systems
214 active public water systems serve King County, reporting 3.3M people served.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
214
Population served
3.3M
Community systems
153
Groundwater share
81.8%
Water systems in King County
| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Seattle Public Utilities | King | 1,161,961 | Community | Surface water |
| 2 | Bellevue City of | King | 321,349 | Community | Purchased surface water |
| 3 | Kent Water Department | King | 166,421 | Community | Purchased surface water |
| 4 | Redmond Water System City of | King | 163,335 | Community | Purchased surface water |
| 5 | Lakehaven Water and Sewer District | King | 148,809 | Community | Purchased surface water |
| 6 | Renton City of | King | 108,091 | Community | Groundwater |
| 7 | Auburn City of | King | 107,655 | Community | Groundwater |
| 8 | Highline Water District | King | 100,170 | Community | Purchased surface water |
| 9 | Northshore Utility District | King | 99,789 | Community | Purchased surface water |
| 10 | Sammamish Plateau Water & Sewer | King | 79,362 | Community | Purchased surface water |
| 11 | Kirkland City of | King | 69,243 | Community | Purchased surface water |
| 12 | Woodinville Water District | King | 66,699 | Community | Purchased surface water |
| 13 | Soos Creek Water & Sewer District | King | 64,534 | Community | Purchased surface water |
| 14 | Covington Water District | King | 56,172 | Community | Purchased surface water |
| 15 | Port of Seattle/Seatac Airport | King | 49,483 | Non-transient non-community | Purchased surface water |
| 16 | Issaquah Water System | King | 43,584 | Community | Purchased surface water |
| 17 | King County Water District #20 | King | 38,974 | Community | Purchased surface water |
| 18 | Tukwila Water Department | King | 36,298 | Community | Purchased surface water |
| 19 | Bothell Water City of | King | 33,643 | Community | Purchased surface water |
| 20 | North City Water District | King | 32,847 | Community | Purchased surface water |
| 21 | Mercer Island City of | King | 31,057 | Community | Purchased surface water |
| 22 | Cedar River Water & Sewer District | King | 28,671 | Community | Purchased surface water |
| 23 | Lake Meridian Water District | King | 24,231 | Community | Purchased surface water |
| 24 | Enumclaw Water Department | King | 23,276 | Community | Groundwater |
| 25 | King County Water District #125 | King | 21,904 | Community | Purchased surface water |
| 26 | King County Water District No 90 | King | 20,100 | Community | Purchased surface water |
| 27 | King County Water District #49 | King | 16,065 | Community | Purchased surface water |
| 28 | Coal Creek Utility District | King | 15,989 | Community | Purchased surface water |
| 29 | Snoqualmie Water | King | 15,848 | Community | Groundwater |
| 30 | Skyway Water & Sewer | King | 12,036 | Community | Purchased surface water |
| 31 | Duvall City of | King | 11,050 | Community | Purchased surface water |
| 32 | Union Hill Water Association Inc. | King | 8,720 | Community | Groundwater |
| 33 | Ne Sammamish Sewer & Water District | King | 8,516 | Community | Groundwater |
| 34 | Pacific City of | King | 7,925 | Community | Groundwater |
| 35 | North Bend City of | King | 7,228 | Community | Groundwater |
| 36 | Sallal Water Association Inc. | King | 6,600 | Community | Groundwater |
| 37 | Black Diamond Water Dept | King | 6,407 | Community | Groundwater |
| 38 | Snoqualmie Pass Utility District | King | 5,805 | Community | Groundwater |
| 39 | King County Water District #54 | King | 5,373 | Community | Purchased surface water |
| 40 | Stevens Pass Water System | King | 4,053 | Non-transient non-community | Surface water |
| 41 | King County Water District 119 | King | 3,800 | Community | Purchased surface water |
| 42 | Water District 19 | King | 3,723 | Community | Surface water |
| 43 | Algona Water Dept | King | 3,300 | Community | Purchased surface water |
| 44 | Ames Lake Water Assoc Inc. | King | 3,224 | Community | Groundwater |
| 45 | Lake Forest Park Water District | King | 3,171 | Community | Groundwater |
| 46 | Fall City Water Dist. #127 | King | 2,987 | Community | Groundwater |
| 47 | Cherokee Bay Community Club Inc. | King | 2,400 | Community | Groundwater |
| 48 | Carnation Water System City of | King | 2,400 | Community | Groundwater |
| 49 | Mirrormont | King | 2,083 | Community | Groundwater |
| 50 | Heights Water | King | 2,051 | Community | Groundwater |