All water systems in Washington
1,921 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Winchester EB Rest Area Grant County |
1,330 | 1 | 0 | |
|
Telford Rest Area Lincoln County |
1,309 | 1 | 0 | |
|
Mount Spokane Ski #2 Spokane County |
1,301 | 1 | 0 | |
|
Battle Ground State Park Clark County |
1,290 | 0 | 0 | |
|
Charbonneau Park Walla Walla County |
1,287 | 0 | 0 | |
|
Western Forest Industries Museum Lewis County |
1,266 | 1 | 0 | |
|
Hatton Coulee Rest Area Adams County |
1,255 | 1 | 0 | |
|
Garfield County Fairgrounds Garfield County |
1,250 | 0 | 0 | |
|
Frontier County Park Pierce County |
1,230 | 0 | 0 | |
|
South Whidbey State Park Island County |
1,203 | 0 | 0 | |
|
Maryhill State Park Klickitat County |
1,133 | 0 | 0 | |
|
Elma Rest Area Grays Harbor County |
1,122 | 1 | 0 | |
|
Paradise Point State Park Clark County |
1,114 | 0 | 0 | |
|
Alta Lake State Park Okanogan County |
1,071 | 0 | 0 | |
|
Schilter Family Farm Store Thurston County |
1,056 | 0 | 0 | |
|
Potlatch State Park Mason County |
1,055 | 1 | 0 | |
|
Scenic Beach State Park Kitsap County |
1,045 | 0 | 0 | |
|
Spring Canyon Campground Lincoln County |
1,043 | 0 | 0 | |
|
Mission Ridge Ski Area Water System Chelan County |
1,009 | 1 | 0 | |
|
Conconully State Park Okanogan County |
1,004 | 0 | 0 | |
|
Washington Cathedral King County |
1,001 | 0 | 0 | |
|
Dungeness River Nature Center Sequim · County |
1,000 | 0 | 0 | |
|
Wiley City Fairgrounds Yakima County |
1,000 | 0 | 0 | |
|
Deception Pass SP Rosario Beach Skagit County |
999 | 0 | 0 | |
|
Joemma Beach Pierce County |
989 | 1 | 0 | |
|
Selah CR SB Rest Area Yakima County |
981 | 0 | 0 | |
|
Kayak Point County Park Snohomish County |
978 | 0 | 0 | |
|
Selah CR NB Rest Area Yakima County |
973 | 0 | 0 | |
|
Twenty Five Mile Creek State Park Chelan County |
970 | 0 | 0 | |
|
Eagle Plaza Truck Stop Lewis County |
962 | 0 | 0 | |
|
Forest Learning Center Cowlitz County |
951 | 1 | 0 | |
|
Winchester WB Rest Area Grant County |
944 | 1 | 0 | |
|
General Store Benton County |
939 | 0 | 0 | |
|
Alder Lake Park Water System Pierce County |
934 | 1 | 0 | |
|
Whitehorse Mercantile Water System Snohomish County |
930 | 1 | 0 | |
|
Roosevelt Park Klickitat County |
899 | 1 | 0 | |
|
Potholes General Store Grant County |
877 | 2 | 0 | |
|
Keller Ferry Marina Lincoln County |
875 | 0 | 0 | |
|
Lewisville Park Clark County |
875 | 0 | 0 | |
|
Johns Farms Okanogan County |
872 | 0 | 0 | |
|
Okanogan County Fair Water System Okanogan County |
867 | 2 | 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 | |
|
Lake Merwin Campers Hideaway Sys 1 Clark County |
820 | 0 | 0 | |
|
Penrose Point State Park Pierce County |
816 | 1 | 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 | |
|
Sucia Island State Park San Juan County |
794 | 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 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.