All water systems in Washington
4,692 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Moran State Park-Mountain Lake San Juan County |
4,804 | 0 | 0 | |
|
Moran State Park Summit Lake San Juan County |
4,803 | 0 | 0 | |
|
Vinland Kitsap County |
4,801 | 1 | 0 | |
|
Moran State Park-Cascade Lake San Juan County |
4,783 | 0 | 0 | |
|
Indian John Rest Area (eb/wb) Kittitas County |
4,726 | 1 | 0 | |
|
Stevenson Water Dept Skamania County |
4,702 | 2 | 0 | |
|
Warden City of Grant County |
4,674 | 0 | 0 | |
|
Pattison 500 Thurston County |
4,643 | 0 | 0 | |
|
Long Beach Water Department Pacific County |
4,628 | 0 | 0 | |
|
Raymond Water Department Pacific County |
4,620 | 1 | 0 | |
|
Belfair Water District 1 Mason County |
4,432 | 0 | 0 | |
|
South Bainbridge Kitsap County |
4,414 | 1 | 0 | |
|
Castle Rock Municipal Water Cowlitz County |
4,367 | 2 | 0 | |
|
Orchard Avenue Irrigation Dist 6 Spokane County |
4,330 | 0 | 0 | |
|
Goldendale City of Klickitat County |
4,314 | 1 | 0 | |
|
East Spokane Water Dist 1 Spokane County |
4,285 | 1 | 0 | |
|
Trentwood Irrigation District 3 Spokane County |
4,228 | 3 | 0 | |
|
Gorge Amphitheatre Grant County |
4,219 | 0 | 0 | |
|
Suquamish Kitsap County |
4,203 | 1 | 0 | |
|
Paradise Pierce County |
4,165 | 0 | 0 | |
|
Crystal Mountain INC Pierce County |
4,154 | 0 | 0 | |
|
Irvin Water District #6 Spokane County |
4,150 | 1 | 0 | |
|
Coupeville Town of Island County |
4,142 | 0 | 0 | |
|
White Salmon City of Klickitat County |
4,077 | 3 | 0 | |
|
Stevens Pass Water System King County |
4,053 | 1 | 0 | |
|
Granger Water Department Yakima County |
3,993 | 1 | 0 | |
|
Eatonville Water Dept Pierce County |
3,945 | 1 | 0 | |
|
Everson City of Whatcom County |
3,893 | 0 | 0 | |
|
Brewster City of Okanogan County |
3,843 | 1 | 0 | |
|
Okanogan Water Department City of Okanogan County |
3,817 | 1 | 0 | |
|
King County Water District 119 King County |
3,800 | 0 | 0 | |
|
Spo CO Water Dist 3 Sys 3 Spokane County |
3,768 | 0 | 0 | |
|
Grand Mound Thurston County |
3,764 | 0 | 0 | |
|
Parkview Terrace Kitsap County |
3,730 | 0 | 0 | |
|
Eastsound Water Users Association San Juan County |
3,711 | 0 | 0 | |
|
Lummi Tribal Water District Ferndale · County |
3,699 | 8 | 3 | |
|
Lake Cushman System 5 Mason County |
3,675 | 0 | 0 | |
|
Toutle River Rest Area Nb/sb Cowlitz County |
3,590 | 1 | 0 | |
|
Friday Harbor Town of San Juan County |
3,543 | 0 | 0 | |
|
Roosevelt Water Association Snohomish County |
3,530 | 1 | 0 | |
|
Zillah City of Yakima County |
3,518 | 1 | 0 | |
|
Naches Town of Yakima County |
3,512 | 3 | 1 | |
|
Colfax Water Department City of Whitman County |
3,507 | 2 | 0 | |
|
Winlock City of Lewis County |
3,502 | 0 | 0 | |
|
Forks Municipal Water Dept Clallam County |
3,468 | 0 | 0 | |
|
Millersylvania State Park Thurston County |
3,456 | 1 | 0 | |
|
Horizons West Kitsap County |
3,454 | 0 | 0 | |
|
Legends Casino County |
3,450 | 0 | 0 | |
|
Royal City Water Grant County |
3,389 | 1 | 0 | |
|
Dayton Water Department Columbia County |
3,374 | 0 | 0 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules still in violation at EPA's latest data refresh.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Washington records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.