Groundwater Rule (GWR) violations in Ohio
16 active public water systems in Ohio had a Groundwater Rule (GWR) violation in the past three years, 15 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 |
|---|---|---|---|---|
|
Carrollton Village Carroll County |
3,055 | 3 | 3 | |
|
Creston Village Wayne County |
2,171 | 3 | 2 | |
|
Hiram Village PWS Portage County |
1,406 | 3 | 2 | |
|
Malvern Village PWS Carroll County |
1,200 | 3 | 2 | |
|
Washingtonville Village PWS Columbiana County |
801 | 3 | 2 | |
|
Chardon Estates Geauga County |
217 | 4 | 4 | |
|
Big Prairie Community Water Company Holmes County |
200 | 4 | 2 | |
|
Nashville Village PWS Holmes County |
197 | 3 | 1 | |
|
Birchwood Manor MHC New Portage County |
150 | 2 | 1 | |
|
Mahoning Valley Market &marathon Gas PWS Mahoning County |
100 | 1 | 1 | |
|
Concord Care Center of Hartford Trumbull County |
99 | 3 | 1 | |
|
Dfc Mobile Home Park Ashtabula County |
85 | 4 | 2 | |
|
North Benton Dairy Bar PWS Mahoning County |
50 | 3 | 2 | |
|
Cope Plaza PWS Summit County |
25 | 1 | 1 | |
|
Lazy B Campground Wayne County |
25 | 2 | 2 | |
|
Byesville Guernsey County |
5,104 | 5 | 2 |
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 Ohio 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.