All water systems in Ohio
4,165 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Roseville PWS Muskingum County |
1,852 | 2 | 1 | |
|
Grandview Medical Center PWS Montgomery County |
1,850 | 1 | 0 | |
|
North Lewisburg Village PWS Champaign County |
1,850 | 2 | 0 | |
|
Leetonia Village PWS Columbiana County |
1,833 | 1 | 0 | |
|
Northern Perry Co.water #2 Perry County |
1,802 | 4 | 3 | |
|
Lewisburg Village PWS Preble County |
1,800 | 1 | 0 | |
|
Pomeroy Village PWS Meigs County |
1,800 | 6 | 4 | |
|
Tanglewood Lake Water CO Geauga County |
1,800 | 2 | 1 | |
|
West Liberty Village PWS Logan County |
1,800 | 3 | 2 | |
|
McConnelsville Village Morgan County |
1,780 | 1 | 1 | |
|
Windham Village PWS Portage County |
1,777 | 2 | 2 | |
|
Roaming Shores Village PWS Ashtabula County |
1,764 | 3 | 1 | |
|
West Unity Village Williams County |
1,760 | 2 | 1 | |
|
Aqua Ohio Preble County Preble County |
1,748 | 0 | 0 | |
|
Antwerp Village PWS Paulding County |
1,741 | 1 | 1 | |
|
Canal Pointe Industrial Park PWS Fairfield County |
1,721 | 0 | 0 | |
|
Erie CO Huron East District Erie County |
1,713 | 1 | 1 | |
|
Candlewood Lake Association INC Morrow County |
1,710 | 0 | 0 | |
|
Trumbull Co. Mosquito Creek PWS Trumbull County |
1,708 | 1 | 1 | |
|
Northern Perry Co.water #1 Perry County |
1,706 | 4 | 2 | |
|
South Amherst Village PWS Lorain County |
1,688 | 0 | 0 | |
|
New Paris Village PWS Preble County |
1,681 | 4 | 2 | |
|
Carlisle City PWS Warren County |
1,675 | 1 | 1 | |
|
Orwell Village PWS Ashtabula County |
1,660 | 1 | 1 | |
|
South Charleston Village PWS Clark County |
1,660 | 2 | 1 | |
|
Glouster Public Water System Athens County |
1,659 | 2 | 1 | |
|
Russells Point Village PWS Logan County |
1,651 | 2 | 1 | |
|
7-Eleven Store # 36177 Richland County |
1,650 | 0 | 0 | |
|
Union City Village PWS Darke County |
1,650 | 1 | 1 | |
|
Mechanicsburg Village PWS Champaign County |
1,644 | 1 | 1 | |
|
Greenford Christian Life Center (c, D,e) Mahoning County |
1,623 | 0 | 0 | |
|
Ohio and Lee Twp Water Authority Monroe County |
1,620 | 1 | 1 | |
|
Fin Feather Fur Outfitters Ashland County |
1,607 | 0 | 0 | |
|
East Canton Village PWS Stark County |
1,606 | 2 | 1 | |
|
Honda Dma Trans Manufacturing OH Div Logan County |
1,600 | 1 | 0 | |
|
Northridge Local School Campus Licking County |
1,600 | 0 | 0 | |
|
Timberlake Water System Franklin County |
1,600 | 2 | 1 | |
|
Green Springs Village PWS Seneca County |
1,592 | 2 | 1 | |
|
Powhatan Point Public Water System Belmont County |
1,592 | 1 | 1 | |
|
Newport Water/sewer District PWS Washington County |
1,582 | 4 | 2 | |
|
Deshler Village Henry County |
1,578 | 2 | 1 | |
|
Winesburg Area Development Corporation Holmes County |
1,575 | 0 | 0 | |
|
Felicity Village PWS Clermont County |
1,573 | 3 | 2 | |
|
Lithopolis Village PWS Fairfield County |
1,573 | 4 | 2 | |
|
Anna Village PWS Shelby County |
1,558 | 1 | 1 | |
|
Payne Village PWS Paulding County |
1,550 | 1 | 1 | |
|
Pheasant Run Association PWS Lorain County |
1,550 | 1 | 1 | |
|
Kalida Village PWS Putnam County |
1,542 | 0 | 0 | |
|
Otterbein-Lebanon Retreat Center Warren County |
1,541 | 3 | 2 | |
|
Northwestern Local Schools PWS Wayne County |
1,540 | 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.