All water systems in Ohio
4,165 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Lakengren Water Authority Preble County |
2,950 | 0 | 0 | |
|
Old Straitsville Water Association Perry County |
2,950 | 3 | 2 | |
|
Lodi Village PWS Medina County |
2,884 | 1 | 1 | |
|
Trumbull Co. Mineral Ridge PWS Trumbull County |
2,858 | 1 | 1 | |
|
Bridgeport Public Water System Belmont County |
2,830 | 4 | 3 | |
|
Lisbon Village Columbiana County |
2,821 | 3 | 2 | |
|
South Zanesville PWS Muskingum County |
2,800 | 0 | 0 | |
|
Grafton Village PWS Lorain County |
2,769 | 2 | 1 | |
|
Middlefield Village PWS Geauga County |
2,748 | 0 | 0 | |
|
Buckeye Lake, Village of PWS Licking County |
2,746 | 1 | 1 | |
|
Putnam Community Water Association PWS Washington County |
2,744 | 2 | 1 | |
|
Covington Village PWS Miami County |
2,718 | 2 | 1 | |
|
Columbia Park Water System Cuyahoga County |
2,716 | 3 | 1 | |
|
New Richmond Village PWS Clermont County |
2,698 | 3 | 1 | |
|
Versailles Village PWS Darke County |
2,687 | 1 | 0 | |
|
Clear Water Corporation Noble County |
2,670 | 3 | 2 | |
|
Fredericktown Village Knox County |
2,648 | 0 | 0 | |
|
Loudonville Village Ashland County |
2,641 | 1 | 0 | |
|
Newpointe Community Church PWS Tuscarawas County |
2,640 | 0 | 0 | |
|
Jefferson CO W and S District a Jefferson County |
2,635 | 4 | 2 | |
|
Bethel Village PWS Clermont County |
2,620 | 3 | 2 | |
|
Strasburg Village PWS Tuscarawas County |
2,610 | 1 | 1 | |
|
Woodsfield Village PWS Monroe County |
2,598 | 3 | 1 | |
|
ST Henry Village Mercer County |
2,596 | 1 | 1 | |
|
Sabina Village PWS Clinton County |
2,564 | 2 | 1 | |
|
Odnr-Hocking Hills State Park Hocking County |
2,559 | 0 | 0 | |
|
Crooksville Perry County |
2,534 | 4 | 1 | |
|
Silver Lake Village PWS Summit County |
2,519 | 1 | 0 | |
|
Gibsonburg Village PWS Sandusky County |
2,506 | 1 | 1 | |
|
Aqua Ohio Worthington Hills PWS Franklin County |
2,500 | 0 | 0 | |
|
Glendale Village PWS Hamilton County |
2,500 | 2 | 1 | |
|
Mission Conversion Services Alliance LLC Pike County |
2,500 | 0 | 0 | |
|
Switzerland of Ohio Water Monroe County |
2,500 | 1 | 1 | |
|
New Concord PWS Muskingum County |
2,491 | 2 | 1 | |
|
Travel Centers of America Madison County |
2,490 | 2 | 1 | |
|
Williamsburg Village PWS Clermont County |
2,490 | 1 | 1 | |
|
Middleport Village PWS Meigs County |
2,446 | 4 | 2 | |
|
Enon Village PWS Clark County |
2,415 | 0 | 0 | |
|
Cridersville Village PWS Auglaize County |
2,410 | 2 | 1 | |
|
Wright Patterson Medical Center PWS Greene County |
2,401 | 0 | 0 | |
|
Lagrange Village PWS Lorain County |
2,400 | 3 | 1 | |
|
Mwcd-Atwood Park Carroll County |
2,400 | 0 | 0 | |
|
Odnr Pymatuning State Park Ashtabula County |
2,381 | 0 | 0 | |
|
Aqua Ohio Mohawk PWS Carroll County |
2,376 | 1 | 1 | |
|
Ayersville Water and Sewer District Defiance County |
2,372 | 1 | 1 | |
|
Tri-County Water Authority Harrison County |
2,370 | 2 | 1 | |
|
Hebron Village PWS Licking County |
2,368 | 1 | 1 | |
|
Noble County Water Authority PWS Noble County |
2,368 | 3 | 3 | |
|
Miami Co-N25a Extension Miami County |
2,367 | 2 | 0 | |
|
Leipsic Village Putnam County |
2,348 | 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 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.