Mercer County, OH
The federal environmental record for Mercer County (population 42,439): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
0
Superfund NPL sites
0
federal cleanup sites
1
PFAS-detecting water systems
7
TRI facilities
2
open tank releases
Drinking water: PFAS testing
Public water systems serving Mercer with at least one PFAS detection under UCMR5. The federal limit for PFOA and PFOS is 4 ng/L; EPA proposed in May 2026 to rescind the limits for the other compounds, which are shown for information.
| System | Highest results | Reading |
|---|---|---|
| CELINA CITY OH5400011 | PFBA: 10.2 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
7 facilities in Mercer filed TRI reports for 2024, totalling 244 lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| CELINA ALUMINUM PRECISION TECH | CELINA | Copper, Lead | 134 lb |
| J&M MANUFACTURING CO. INC. | FORT RECOVERY | Manganese | 71 lb |
| PAX MACHINE WORKS INC | CELINA | Nickel, Chromium | 30 lb |
| FORT RECOVERY INDUSTRIES INC | FORT RECOVERY | Lead, Copper | 9 lb |
| COOPER FARMS EAST MILL | FORT RECOVERY | - | 0 lb |
| CROWN EQUIPMENT CORP | CELINA | - | 0 lb |
| COOPER FARMS INC | FORT RECOVERY | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 96 tank facilities in Mercer: 94 tanks in service and 164 closed. 104 fuel releases are on record, of which 2 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Mercer as Zone 1, the highest predicted indoor radon levels (over 4 pCi/L average). Radon and air quality are covered in depth on lung.com.
The record for one specific address
County figures blur what matters: distance. The Address Environmental Report runs these same federal datasets against one address and reports every site, tank, polluter and water result around it, with distances, in about a minute.
Get the report - $39