All water systems in Ohio
4,165 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Portersville East Branch Water Co. Perry County |
2,340 | 0 | 0 | |
|
Garrettsville Village PWS Portage County |
2,325 | 0 | 0 | |
|
Gambier Village PWS Knox County |
2,300 | 1 | 0 | |
|
Seville Village PWS Medina County |
2,296 | 1 | 0 | |
|
Carroll Water and Sewer Ottawa County |
2,288 | 1 | 1 | |
|
Spencerville Village Allen County |
2,261 | 0 | 0 | |
|
Utica Village PWS Licking County |
2,235 | 2 | 1 | |
|
Sugarcreek Village PWS Tuscarawas County |
2,220 | 2 | 0 | |
|
Choctaw Utilities, Inc. Madison County |
2,200 | 2 | 1 | |
|
Richwood Village PWS Union County |
2,200 | 6 | 2 | |
|
Reno Water and Sewer 1 Washington County |
2,189 | 2 | 1 | |
|
Piketon Village PWS Pike County |
2,181 | 4 | 2 | |
|
Creston Village Wayne County |
2,171 | 3 | 2 | |
|
Coal Grove Lawrence County |
2,167 | 1 | 1 | |
|
Aqua Ohio Midvale Tuscarawas County |
2,147 | 2 | 1 | |
|
Columbus Grove Village Putnam County |
2,137 | 4 | 2 | |
|
Mad River Mountain Logan County |
2,135 | 0 | 0 | |
|
Brewster Village PWS Stark County |
2,113 | 0 | 0 | |
|
Arcanum Village PWS Darke County |
2,100 | 1 | 0 | |
|
Tecumseh Schools Main Campus Clark County |
2,100 | 0 | 0 | |
|
Travel Centers of America 39 Licking County |
2,100 | 0 | 0 | |
|
Saint Paris Village PWS Champaign County |
2,089 | 0 | 0 | |
|
Cardington Village PWS Morrow County |
2,079 | 2 | 1 | |
|
Mount Sterling Village PWS Madison County |
2,059 | 2 | 2 | |
|
Salt Fork Utility Co. Guernsey County |
2,054 | 3 | 2 | |
|
Camden, Village of Preble County |
2,050 | 0 | 0 | |
|
Madison Water District Richland County |
2,050 | 0 | 0 | |
|
Manchester Village Adams County |
2,043 | 4 | 0 | |
|
Mwcd-Tappan Lake Park Harrison County |
2,012 | 0 | 0 | |
|
Woodville Village Sandusky County |
2,006 | 1 | 1 | |
|
Bradford Village PWS Darke County |
2,000 | 1 | 1 | |
|
Brilliant Water and Sewer Jefferson County |
2,000 | 4 | 2 | |
|
Dalton Village PWS Wayne County |
2,000 | 2 | 1 | |
|
Dresden PWS Muskingum County |
2,000 | 1 | 1 | |
|
Odot Rest Area 1-25 NB Hancock County |
2,000 | 0 | 0 | |
|
South Bloomfield Village PWS Pickaway County |
1,999 | 3 | 1 | |
|
Jamestown Village PWS Greene County |
1,997 | 4 | 1 | |
|
West Geauga Plaza-Main Geauga County |
1,997 | 0 | 0 | |
|
Burr Oak Regional Water District Athens County |
1,994 | 1 | 1 | |
|
Pure Water Corporation Noble County |
1,989 | 3 | 2 | |
|
Peebles Village Adams County |
1,978 | 1 | 1 | |
|
Navarre Village PWS Stark County |
1,957 | 3 | 2 | |
|
McArthur, Village of Vinton County |
1,920 | 4 | 1 | |
|
Bellville Village Richland County |
1,918 | 2 | 1 | |
|
Beverly Village PWS Washington County |
1,900 | 3 | 2 | |
|
Berlin Water Company Holmes County |
1,896 | 1 | 1 | |
|
Edgerton Village Williams County |
1,881 | 1 | 1 | |
|
Plymouth Village Richland County |
1,874 | 1 | 1 | |
|
Switzer Water Association Monroe County |
1,860 | 0 | 0 | |
|
Waynoka Regional Water and Sewer Dist Brown County |
1,860 | 3 | 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.