All water systems in Washington
4,692 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Sumas Water Dept Whatcom County |
2,157 | 0 | 0 | |
|
Alderbrook Water CO Mason County |
2,154 | 0 | 0 | |
|
Mabton City of Yakima County |
2,150 | 0 | 0 | |
|
Limekiln State Park San Juan County |
2,149 | 1 | 0 | |
|
Lake Limerick Water Mason County |
2,148 | 1 | 0 | |
|
Morton City of Lewis County |
2,147 | 1 | 0 | |
|
Lakeland Village Water Mason County |
2,120 | 1 | 0 | |
|
River Rock Tobacco and Fuel Arlington · County |
2,117 | 4 | 1 | |
|
Ryegrass Eb/wb Rest Area Kittitas County |
2,114 | 1 | 0 | |
|
Sunnyslope Kitsap County |
2,112 | 1 | 0 | |
|
Pearrygin Lake State Park Both CG Okanogan County |
2,103 | 1 | 0 | |
|
Roslyn City of Kittitas County |
2,099 | 1 | 0 | |
|
Sandy Point Improvement CO Whatcom County |
2,098 | 0 | 0 | |
|
White Pass Company INC Lewis County |
2,094 | 4 | 0 | |
|
Ohanapecosh Pierce County |
2,092 | 0 | 0 | |
|
Roche Harbor Water System INC San Juan County |
2,091 | 0 | 0 | |
|
Mirrormont King County |
2,083 | 0 | 0 | |
|
Naselle Pacific County |
2,073 | 1 | 0 | |
|
Mistequa Casino Chewelah · County |
2,070 | 5 | 0 | |
|
View Royal Water System Pierce County |
2,069 | 0 | 0 | |
|
Heights Water King County |
2,051 | 1 | 0 | |
|
Nisqually Pines Community Club Thurston County |
2,037 | 0 | 0 | |
|
Deer Creek Water Assoc. Whatcom County |
2,000 | 0 | 0 | |
|
End of Trail II Oakville · County |
2,000 | 1 | 1 | |
|
Purdy Campus System Pierce County |
2,000 | 0 | 0 | |
|
Burbank Business Park Walla Walla County |
1,983 | 0 | 0 | |
|
Lewis CO Water Dist #2 Lewis County |
1,983 | 0 | 0 | |
|
Clinton Water District Island County |
1,980 | 0 | 0 | |
|
Skagit CO Water District #1 Skagit County |
1,974 | 0 | 0 | |
|
Pole Road Water Association Whatcom County |
1,960 | 0 | 0 | |
|
Flaming Geyser State Park King County |
1,947 | 0 | 0 | |
|
Toledo Municipal Lewis County |
1,944 | 1 | 0 | |
|
Millwood City of Spokane County |
1,925 | 1 | 0 | |
|
Palmer Lake Pierce County |
1,924 | 0 | 0 | |
|
Suquamish Regional Public Water System Poulsbo · County |
1,874 | 5 | 0 | |
|
Summit View Water System Benton County |
1,869 | 1 | 1 | |
|
Wilderness Rim Association King County |
1,867 | 1 | 0 | |
|
Scatter Creek Rest Area Thurston County |
1,858 | 1 | 0 | |
|
Nason Creek Rest Area Chelan County |
1,855 | 1 | 0 | |
|
Hoodsport Mason County |
1,853 | 1 | 0 | |
|
Rocky Point Water District 12 Kitsap County |
1,831 | 0 | 0 | |
|
LA Conner Water Dept Skagit County |
1,821 | 0 | 0 | |
|
Waitsburg City of Walla Walla County |
1,817 | 1 | 0 | |
|
Cosmopolis Water Department Grays Harbor County |
1,812 | 2 | 0 | |
|
Electric City City of Grant County |
1,812 | 0 | 0 | |
|
Hamilton AL Lewis County |
1,807 | 1 | 0 | |
|
Canterwood Water System Pierce County |
1,805 | 0 | 0 | |
|
Moab Irrigation Dist #20 Spokane County |
1,790 | 0 | 0 | |
|
Glenhaven Lakes Club Whatcom County |
1,780 | 0 | 0 | |
|
Rochester Thurston County |
1,762 | 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.