All water systems in Ohio
4,165 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Mohawk K-12 School Wyandot County |
1,044 | 0 | 0 | |
|
McDonalds Restaurant Wooster Wayne County |
1,042 | 0 | 0 | |
|
Williamsport Village PWS Pickaway County |
1,038 | 3 | 0 | |
|
Kettering Health Soin Medical Center Greene County |
1,035 | 1 | 0 | |
|
Kingston Village PWS Ross County |
1,032 | 5 | 4 | |
|
Beach City Village PWS Stark County |
1,031 | 0 | 0 | |
|
Parkman Market Express Geauga County |
1,020 | 0 | 0 | |
|
Andover Village PWS Ashtabula County |
1,019 | 1 | 1 | |
|
Yorkville Village PWS Jefferson County |
1,019 | 5 | 2 | |
|
Glandorf Village Putnam County |
1,001 | 2 | 0 | |
|
Odot Rest Area 1-33 1-34 Wyandot County |
1,001 | 0 | 0 | |
|
Speedway 3512 PWS Geauga County |
1,001 | 0 | 0 | |
|
Eldora Speedway Infield Well PWS Darke County |
1,000 | 0 | 0 | |
|
Eldora Speedway North Well PWS Darke County |
1,000 | 2 | 0 | |
|
Great Lakes Cheese Hiram PWS Geauga County |
1,000 | 0 | 0 | |
|
Mount Carmel Grove City Franklin County |
1,000 | 0 | 0 | |
|
Odnr-West Branch-Tower Portage County |
1,000 | 0 | 0 | |
|
Odot / Rest Area 3-35 Wayne County |
1,000 | 0 | 0 | |
|
Odot Rest Area 1-31 EB Allen County |
1,000 | 0 | 0 | |
|
Odot Rest Area 1-32 WB Allen County |
1,000 | 0 | 0 | |
|
Quaker City Motorsports Park PWS Mahoning County |
1,000 | 1 | 1 | |
|
Seven Mile Village PWS Butler County |
1,000 | 1 | 1 | |
|
Bolivar Village PWS Tuscarawas County |
998 | 1 | 1 | |
|
Danville Village PWS Knox County |
994 | 2 | 1 | |
|
Thornville, Village of Perry County |
991 | 1 | 0 | |
|
Gratis Village PWS Preble County |
990 | 2 | 2 | |
|
Jefferson Co.san.dist.-G PWS Jefferson County |
990 | 0 | 0 | |
|
Travel Centers of America 11 PWS Preble County |
990 | 1 | 0 | |
|
Bradner Village PWS Wood County |
985 | 1 | 1 | |
|
Hopedale Village PWS Harrison County |
984 | 5 | 1 | |
|
Lake Lucerne Club Co. Geauga County |
980 | 0 | 0 | |
|
Ottoville Village PWS Putnam County |
976 | 1 | 1 | |
|
Farmersville Village PWS Montgomery County |
975 | 1 | 1 | |
|
Philo Muskingum County |
974 | 2 | 1 | |
|
Hamden Village PWS Vinton County |
970 | 1 | 1 | |
|
Pleasantville Village PWS Fairfield County |
960 | 1 | 1 | |
|
Fuel Mart 767 Wood County |
957 | 0 | 0 | |
|
Bloomville Village PWS Seneca County |
956 | 1 | 1 | |
|
Pilot Corporation Eaton 286 Preble County |
955 | 1 | 0 | |
|
Sardinia Village PWS Brown County |
952 | 3 | 2 | |
|
Bloomfield Water Company Holmes County |
950 | 1 | 1 | |
|
Fort Hamilton Hospital PWS Butler County |
950 | 1 | 0 | |
|
Killbuck Village PWS Holmes County |
950 | 2 | 1 | |
|
Notre Dame Sisters and Elementary School Geauga County |
950 | 1 | 1 | |
|
Shawnee High School Clark County |
950 | 0 | 0 | |
|
St. Anselm Parish and School Geauga County |
950 | 0 | 0 | |
|
Warren Co. Pennyroyal Area PWS Warren County |
950 | 1 | 1 | |
|
Waynesburg Village PWS Stark County |
950 | 4 | 2 | |
|
New Knoxville Village Auglaize County |
946 | 1 | 1 | |
|
Seaman Village PWS Adams County |
944 | 1 | 1 |
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 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. Retrieved from ECHO on Oct 11, 2026.