Groundwater Rule (GWR) violations in Washington
22 active public water systems in Washington had a Groundwater Rule (GWR) violation in the past three years, 14 of them in the latest quarter of EPA's data. What Groundwater Rule (GWR) is and why it matters.
Systems with a Groundwater Rule (GWR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Taholah Tahola · County |
1,600 | 4 | 2 | |
|
Wellpinit Wellpinit · County |
525 | 6 | 2 | |
|
Two Rivers Resort Wellpinit · County |
480 | 6 | 2 | |
|
Omak Hud Nespelem · County |
380 | 9 | 0 | |
|
McCoy Lake Wellpinit · County |
325 | 6 | 2 | |
|
Road Warrior Wapato · County |
250 | 4 | 1 | |
|
Fort Simcoe Job Corps Ctr Toppenish · County |
230 | 8 | 1 | |
|
Queets Tahola · County |
200 | 5 | 3 | |
|
Seatons Grove Nespelem · County |
115 | 9 | 1 | |
|
Reservation Road Wellpinit · County |
110 | 5 | 1 | |
|
Mount Baker Mobile Home Park Whatcom County |
87 | 1 | 0 | |
|
Sauk-Suiattle Darrington · County |
80 | 7 | 3 | |
|
Evergreen Retreat MHP Whatcom County |
39 | 1 | 0 | |
|
Cove Beach Water System King County |
30 | 1 | 0 | |
|
Ranch House Bbq Thurston County |
135 | 2 | 0 | |
|
Talcott Ridge 695 Thurston County |
102 | 1 | 0 | |
|
Duggan Falls Skamania County |
100 | 1 | 0 | |
|
Holiday Hills Community Club INC Pierce County |
50 | 4 | 0 | |
|
Vicente Farms & Sons Enterprise Whatcom County |
45 | 2 | 0 | |
|
Prairie Village Mobile Home Court Pierce County |
40 | 1 | 0 | |
|
Trout Meadows Yakima County |
37 | 1 | 0 | |
|
Olalla Bay Market Kitsap County |
36 | 1 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Groundwater Rule (GWR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Groundwater Rule (GWR) alone.
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.