All water systems in Ohio
4,165 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Alger Village PWS Hardin County |
943 | 4 | 1 | |
|
Wayne Village PWS Wood County |
941 | 2 | 1 | |
|
Butler Village Richland County |
940 | 1 | 1 | |
|
Erie CO Vermilion District Erie County |
930 | 1 | 1 | |
|
Kenston High School Geauga County |
930 | 0 | 0 | |
|
Houston K-12 School Shelby County |
928 | 0 | 0 | |
|
Hamersville Village PWS Brown County |
925 | 1 | 1 | |
|
Carbon Hill Water Association Hocking County |
910 | 2 | 2 | |
|
Lehman's Hardware / Hrm Enterprises Wayne County |
910 | 0 | 0 | |
|
West Farmington Village PWS Trumbull County |
908 | 3 | 2 | |
|
Odot Rest Area 4-36 Portage County |
905 | 0 | 0 | |
|
Thornville Duke and Duchess PWS Licking County |
904 | 0 | 0 | |
|
Albany Village PWS Athens County |
901 | 3 | 2 | |
|
Addyston Village PWS Hamilton County |
900 | 3 | 2 | |
|
Bainbridge Village PWS Ross County |
900 | 1 | 1 | |
|
Faith Life Church PWS Licking County |
900 | 1 | 0 | |
|
Fellowship Bible Church PWS Geauga County |
900 | 0 | 0 | |
|
New Hope Community Church-Bryan Williams County |
900 | 0 | 0 | |
|
The Bell Station Geauga County |
900 | 1 | 0 | |
|
Jefferson CO W&s District J Jefferson County |
896 | 3 | 1 | |
|
Matamoras Village Washington County |
896 | 1 | 1 | |
|
Duke N Duchess 247 PWS Summit County |
893 | 0 | 0 | |
|
New Madison Village PWS Darke County |
892 | 4 | 3 | |
|
Hopewell-Loudon School Seneca County |
890 | 0 | 0 | |
|
Wright Field Child Development Center Greene County |
888 | 0 | 0 | |
|
Lincolnview K-12 School Van Wert County |
882 | 0 | 0 | |
|
Holmesville Bell Stores Holmes County |
881 | 1 | 0 | |
|
End of Commons PWS Trumbull County |
878 | 0 | 0 | |
|
Village of Bloomingburg Fayette County |
878 | 1 | 1 | |
|
Jenkins Sunoco Service Station Licking County |
877 | 0 | 0 | |
|
Dunkirk Village PWS Hardin County |
875 | 2 | 1 | |
|
Sunoco Food Mart 10 Hop in Wood County |
875 | 0 | 0 | |
|
Pike Water, Inc.-Ross 2 PWS Pike County |
873 | 1 | 1 | |
|
Aqua Ohio Timberbrook PW Franklin County |
865 | 0 | 0 | |
|
Marblehead Village Ottawa County |
865 | 4 | 1 | |
|
Sycamore Village PWS Wyandot County |
862 | 0 | 0 | |
|
Brunersburg WD Tinora PWS Defiance County |
859 | 0 | 0 | |
|
Coolville Village PWS Athens County |
859 | 4 | 1 | |
|
Greene Co.-Southwest Reg Water Greene County |
857 | 1 | 1 | |
|
Western Reserve Hospital PWS Summit County |
856 | 0 | 0 | |
|
Western Reserve Schools (k-12 Campus) Mahoning County |
855 | 0 | 0 | |
|
Ney Village Defiance County |
854 | 2 | 1 | |
|
Westfall Middle Scl and High Scl PW Pickaway County |
853 | 1 | 0 | |
|
Damascus Friends Church Columbiana County |
850 | 2 | 1 | |
|
East Sparta Village PWS Stark County |
850 | 0 | 0 | |
|
McDonalds Restaurant Chesterland PWS Geauga County |
850 | 0 | 0 | |
|
Scioto Water Inc. Pond Run Scioto County |
845 | 2 | 1 | |
|
Seven Ranges Scout Reservation Carroll County |
842 | 1 | 1 | |
|
Mansfield Fuel and Food Richland County |
840 | 0 | 0 | |
|
Trumbull Co. Braceville Twp PWS Trumbull County |
835 | 1 | 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 currently 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.