All water systems in Ohio
4,165 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Licking Valley High School PWS Licking County |
650 | 0 | 0 | |
|
ST Helens Parish and School Geauga County |
649 | 1 | 0 | |
|
East Central Ohio Business Park Muskingum County |
642 | 0 | 0 | |
|
Russia Village PWS Shelby County |
640 | 1 | 1 | |
|
Waco Marathon Stark County |
638 | 0 | 0 | |
|
Mendon Village Mercer County |
628 | 1 | 1 | |
|
Lucas Village Richland County |
620 | 2 | 1 | |
|
Four Seasons Marina Hamilton County |
615 | 0 | 0 | |
|
Eastwood High School Wood County |
613 | 0 | 0 | |
|
Field High School Portage County |
610 | 2 | 0 | |
|
Spee-D-Foods #29 PWS Stark County |
606 | 0 | 0 | |
|
Shawnee, Village of Perry County |
605 | 1 | 1 | |
|
Pak-A-Sak 38 PWS Darke County |
604 | 0 | 0 | |
|
Thurston Village PWS Fairfield County |
604 | 5 | 1 | |
|
Ben Logan High School Logan County |
603 | 0 | 0 | |
|
Lowell Village PWS Washington County |
603 | 1 | 1 | |
|
MT Victory Village PWS Hardin County |
603 | 1 | 1 | |
|
Boardman Park-Main Well PWS Mahoning County |
601 | 0 | 0 | |
|
Shiloh Village Richland County |
601 | 1 | 1 | |
|
Cedar Ridge Lodge Area PWS Franklin County |
600 | 0 | 0 | |
|
Cedarlane RV Park Ottawa County |
600 | 0 | 0 | |
|
Cooper Farms Cooked Meats Van Wert Van Wert County |
600 | 0 | 0 | |
|
East Clinton High School Clinton County |
600 | 3 | 0 | |
|
Keim Lumber INC PWS 2 Holmes County |
600 | 1 | 0 | |
|
Nolley Elementary School Summit County |
600 | 0 | 0 | |
|
Odot Rest Area 6-21 PWS Madison County |
600 | 2 | 1 | |
|
Quincy Village PWS Logan County |
600 | 1 | 1 | |
|
Rustic Knolls Campground Knox County |
600 | 2 | 2 | |
|
Kettering Health Washington Twp Montgomery County |
596 | 1 | 0 | |
|
Cory Rawson Schools Hancock County |
595 | 0 | 0 | |
|
Odot Rest Area 1-28 WB Van Wert County |
595 | 0 | 0 | |
|
Madison Plains High School Madison County |
593 | 0 | 0 | |
|
All Saints Catholic Church Seneca County |
590 | 0 | 0 | |
|
Glacier Hill Lakes Campground PWS Auglaize County |
588 | 1 | 0 | |
|
Laurelville, Vlg of Hocking County |
586 | 2 | 1 | |
|
Northern Ohio Rural Water SE District Huron County |
586 | 0 | 0 | |
|
Walnut Hills Water Association Richland County |
583 | 1 | 1 | |
|
Hamler Village Henry County |
580 | 3 | 1 | |
|
Sherwood Forest MHP PWS Darke County |
578 | 1 | 1 | |
|
Middle Point Village PWS Van Wert County |
576 | 2 | 1 | |
|
Crossroads Church of God Allen County |
575 | 0 | 0 | |
|
Friendship Food Store #80 Sandusky County |
575 | 0 | 0 | |
|
Provia Door PWS Holmes County |
575 | 0 | 0 | |
|
Proctorville Village PWS Lawrence County |
574 | 0 | 0 | |
|
Brookfield Acres MHC PWS Trumbull County |
571 | 0 | 0 | |
|
Rawson Village PWS Hancock County |
571 | 1 | 1 | |
|
Geauga County Services Center PWS Geauga County |
570 | 0 | 0 | |
|
Miba Bearings US LLC Morgan County |
570 | 0 | 0 | |
|
Pine Ridge MHP Lorain County |
570 | 5 | 4 | |
|
Swift Mart Inc. Columbiana County |
570 | 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.