State
Ohio: drinking water records
EPA lists 1,089 community water systems serving homes in Ohio. 332 took part in EPA's national PFAS survey (UCMR 5), and 138 found at least one PFAS above the level laboratories can measure.
In focus1,089community water systems
Public records. Clearer context.
0
ZIP reports published
1,089
community water systems
261
systems with a health-based violation since 2016
28
systems that reached the lead action level since 2016
Counties
- Adams County 6 systems
- Allen County 8 systems
- Ashland County 10 systems
- Ashtabula County 11 systems
- Athens County 13 systems
- Auglaize County 8 systems
- Belmont County 15 systems
- Brown County 7 systems
- Butler County 13 systems
- Carroll County 5 systems
- Champaign County 11 systems
- Clark County 26 systems
- Clermont County 9 systems
- Clinton County 7 systems
- Columbiana County 17 systems
- Coshocton County 7 systems
- Crawford County 4 systems
- Cuyahoga County 8 systems
- Darke County 9 systems
- Defiance County 10 systems
- Delaware County 3 systems
- Erie County 12 systems
- Fairfield County 21 systems
- Fayette County 7 systems
- Franklin County 26 systems
- Fulton County 8 systems
- Gallia County 3 systems
- Geauga County 33 systems
- Greene County 19 systems
- Guernsey County 6 systems
- Hamilton County 11 systems
- Hancock County 8 systems
- Hardin County 8 systems
- Harrison County 16 systems
- Henry County 12 systems
- Highland County 5 systems
- Hocking County 8 systems
- Holmes County 11 systems
- Huron County 13 systems
- Jackson County 9 systems
- Jefferson County 18 systems
- Knox County 9 systems
- Lake County 6 systems
- Lawrence County 6 systems
- Licking County 18 systems
- Logan County 11 systems
- Lorain County 15 systems
- Lucas County 8 systems
- Madison County 14 systems
- Mahoning County 7 systems
- Marion County 2 systems
- Medina County 17 systems
- Meigs County 6 systems
- Mercer County 9 systems
- Miami County 15 systems
- Monroe County 6 systems
- Montgomery County 22 systems
- Morgan County 9 systems
- Morrow County 4 systems
- Muskingum County 11 systems
- Noble County 6 systems
- Ottawa County 10 systems
- Paulding County 5 systems
- Perry County 21 systems
- Pickaway County 14 systems
- Pike County 8 systems
- Portage County 28 systems
- Preble County 12 systems
- Putnam County 10 systems
- Richland County 47 systems
- Ross County 7 systems
- Sandusky County 7 systems
- Scioto County 18 systems
- Seneca County 11 systems
- Shelby County 16 systems
- Stark County 36 systems
- Summit County 29 systems
- Trumbull County 25 systems
- Tuscarawas County 14 systems
- Union County 3 systems
- Van Wert County 5 systems
- Vinton County 3 systems
- Warren County 16 systems
- Washington County 15 systems
- Wayne County 30 systems
- Williams County 12 systems
- Wood County 20 systems
- Wyandot County 4 systems
ZIP reports
Sources
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.