All water systems in Washington
4,692 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Quileute Water System Lapush · County |
885 | 2 | 0 | |
|
Island Lake Kitsap County |
883 | 0 | 0 | |
|
Potholes General Store Grant County |
877 | 2 | 0 | |
|
Carbonado Water Dept Pierce County |
875 | 1 | 0 | |
|
Keller Ferry Marina Lincoln County |
875 | 0 | 0 | |
|
Lewisville Park Clark County |
875 | 0 | 0 | |
|
Johns Farms Okanogan County |
872 | 0 | 0 | |
|
Rolling Hills-Glencairn Island County |
872 | 4 | 0 | |
|
Adams County Water Dist #1 Adams County |
870 | 1 | 1 | |
|
Admirals Cove Water District Island County |
870 | 1 | 0 | |
|
Lake of the Woods Community Club Pierce County |
870 | 0 | 0 | |
|
Okanogan County Fair Water System Okanogan County |
867 | 2 | 0 | |
|
PE Ell Town of Lewis County |
859 | 4 | 0 | |
|
Quincy Valley Rest Area Grant County |
853 | 1 | 0 | |
|
Daroga State Park North Douglas County |
849 | 1 | 0 | |
|
Mossyrock Park Power House Lewis County |
832 | 0 | 0 | |
|
Rosalia Town of Whitman County |
831 | 0 | 0 | |
|
Hangman Hills Water Dist 15 Spokane County |
827 | 3 | 0 | |
|
Camaloch Association Island County |
825 | 1 | 0 | |
|
Lake Merwin Campers Hideaway Sys 1 Clark County |
820 | 0 | 0 | |
|
Penrose Point State Park Pierce County |
816 | 1 | 0 | |
|
Diamond Point Clallam County |
810 | 0 | 0 | |
|
Alpowa Summit Rest Area Garfield County |
801 | 0 | 0 | |
|
Highland Quick Stop Yakima County |
801 | 0 | 0 | |
|
Newhalem Campground & Visitor Ctr Whatcom County |
800 | 0 | 0 | |
|
ST John Town of Whitman County |
800 | 2 | 0 | |
|
Rosedale East Pierce County |
798 | 0 | 0 | |
|
Whatcom County Water Dist 13 Whatcom County |
795 | 0 | 0 | |
|
Sucia Island State Park San Juan County |
794 | 0 | 0 | |
|
Western Wahkiakum Wahkiakum County |
791 | 1 | 0 | |
|
Adams View Wapato · County |
790 | 2 | 0 | |
|
Valle Lindo Homes Walla Walla County |
787 | 0 | 0 | |
|
Sno Pud 1 Storm Lake Ridge Snohomish County |
786 | 1 | 0 | |
|
Veterans Affair Med Ctr Dept of Walla Walla County |
785 | 1 | 0 | |
|
Bogachiel State Park Clallam County |
783 | 0 | 0 | |
|
Curlew Lake State Park Ferry County |
779 | 0 | 0 | |
|
Hillcrest Village Water CO INC Island County |
770 | 1 | 0 | |
|
Scenic Shores Water Company Thurston County |
761 | 1 | 0 | |
|
Wallace Falls State Park Snohomish County |
759 | 0 | 0 | |
|
Sucia Island ST Park-Shallow Bay San Juan County |
757 | 0 | 0 | |
|
Heritage University Water System Toppenish · County |
750 | 5 | 1 | |
|
Heritage University Water System Yakima County |
750 | 0 | 0 | |
|
Northgate Terrace Community Club Island County |
750 | 2 | 0 | |
|
Oalc Tri Cities Franklin County |
750 | 0 | 0 | |
|
Lake Holiday Association Pierce County |
740 | 0 | 0 | |
|
Lewis Co Water Sewer Dist #6 Lewis County |
740 | 2 | 0 | |
|
Lost Lake Property Owners Assn Island County |
736 | 2 | 0 | |
|
Memorial Bible Church Yakima County |
736 | 2 | 0 | |
|
Skagit Speedways Skagit County |
736 | 2 | 0 | |
|
Palouse Empire Fairgrounds Whitman County |
733 | 1 | 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 currently 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.