All water systems in Ohio
4,165 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Leesburg Village Highland County |
1,315 | 1 | 1 | |
|
West Liberty-Salem School Champaign County |
1,315 | 0 | 0 | |
|
Salem Regional Medical Center Columbiana County |
1,310 | 1 | 0 | |
|
Campbell Soup Supply CO Henry County |
1,300 | 5 | 0 | |
|
West Geauga Campus Geauga County |
1,298 | 3 | 0 | |
|
Catalina Mobile Home Park Butler County |
1,280 | 1 | 1 | |
|
West Holmes High School Holmes County |
1,275 | 0 | 0 | |
|
Walnut Creek Water Co. Holmes County |
1,270 | 2 | 1 | |
|
Swancreek Water District PWS Fulton County |
1,269 | 0 | 0 | |
|
Obetz Satellite 2 PWS Franklin County |
1,267 | 2 | 1 | |
|
Lakota Pre K-12 School Sandusky County |
1,262 | 0 | 0 | |
|
Stryker Village Williams County |
1,259 | 1 | 0 | |
|
Botkins Village PWS Shelby County |
1,250 | 1 | 1 | |
|
Northeast Water System Fulton County |
1,250 | 1 | 1 | |
|
Gnadenhutten Tuscarawas County |
1,240 | 2 | 2 | |
|
New Vienna Village Clinton County |
1,240 | 1 | 1 | |
|
New Waterford Village PWS Columbiana County |
1,238 | 1 | 1 | |
|
Smithville Village PWS Wayne County |
1,232 | 2 | 1 | |
|
Aqua Ohio Lake White PWS Pike County |
1,229 | 0 | 0 | |
|
Pleasant Hill Village PWS Miami County |
1,226 | 1 | 0 | |
|
Degraff Village PWS Logan County |
1,225 | 0 | 0 | |
|
Portage County WR Mantua Village PWS Portage County |
1,207 | 1 | 1 | |
|
Pandora Village PWS Putnam County |
1,204 | 1 | 1 | |
|
Malvern Village PWS Carroll County |
1,200 | 3 | 2 | |
|
Ashley Village PWS Delaware County |
1,198 | 1 | 1 | |
|
Apple Creek Village PWS Wayne County |
1,190 | 3 | 0 | |
|
Northmor School PWS Morrow County |
1,180 | 0 | 0 | |
|
Clear Fork High School Richland County |
1,178 | 0 | 0 | |
|
Ansonia Village PWS Darke County |
1,174 | 2 | 1 | |
|
Bellstores #1159 PWS Wayne County |
1,160 | 0 | 0 | |
|
Continental Village PWS Putnam County |
1,153 | 3 | 2 | |
|
Holgate Village Henry County |
1,150 | 3 | 0 | |
|
Attica Village Seneca County |
1,148 | 6 | 0 | |
|
Clark-Shawnee Local Pk-6 School PWS Clark County |
1,120 | 1 | 0 | |
|
Rockford Village Mercer County |
1,120 | 4 | 1 | |
|
Riverdale Local Schools Hancock County |
1,106 | 0 | 0 | |
|
Convoy Village Van Wert County |
1,100 | 2 | 1 | |
|
Eastview Community Water Association Richland County |
1,100 | 1 | 1 | |
|
Frankfort Village PWS Ross County |
1,100 | 1 | 1 | |
|
National Trail Local Schools Preble County |
1,100 | 0 | 0 | |
|
Northwest Water District PWS Williams County |
1,100 | 1 | 0 | |
|
Erie CO Huron South District Erie County |
1,086 | 1 | 1 | |
|
Magnolia Village PWS Stark County |
1,085 | 0 | 0 | |
|
Bell Stores South Marathon Wayne County |
1,083 | 1 | 0 | |
|
Lakeview Village PWS Logan County |
1,083 | 1 | 0 | |
|
Hillsdale School Pk-12 PWS Ashland County |
1,056 | 5 | 0 | |
|
Tuscarawas Village Tuscarawas County |
1,056 | 4 | 2 | |
|
Winchester Public Water System Adams County |
1,052 | 1 | 1 | |
|
Mwcd Charles Mill Lake Park PWS Ashland County |
1,048 | 1 | 0 | |
|
Wakeman Village PWS Huron County |
1,047 | 2 | 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.