Mercer County contains 604 EPA-regulated facilities, 15 of which are currently flagged for significant noncompliance. The county also hosts 3 Superfund sites and 33 TRI chemical reporters. EPA has assessed $3.3M in lifetime penalties and TRI reporters disclosed roughly 190.5k lb of on-site releases. That facility count is well above the Pennsylvania state average of 222 per county.
| Site | City | Status |
|---|---|---|
| Westinghouse Electric Corp Sharon Plant | Sharon | Ready for anticipated reuse |
| Osborne Landfill | Grove City | Ready for anticipated reuse |
| Sharon Steel Corp Farrell Works Disposal Area | Hermitage | Cleanup underway |
| Facility | City | Penalties | Last Inspected |
|---|---|---|---|
| Interstate Chemical Company, Inc. | Hermitage | $27.3k | 2022-09-12 |
| Salem Tube Mfg | Greenville | $1.0k | 2025-07-24 |
| Pine Grove Mobile Home Park-Treatment Plant | Mercer | $0 | 2007-11-21 |
| Stone Ridge Park Mhp | Mercer | $0 | 2024-07-03 |
| Jackson Center Boro Stp | Jackson Center | $0 | 2025-07-14 |
| M&l Market-Treatment Room | Sandy Lake | $0 | |
| Nlmk Pennsylvania Llc | Farrell | $0 | 2026-01-07 |
| Diversified Env Reclamation Llc Sharon Fac | Sharon | $0 | 2024-07-24 |
| Cozy Oaks Mhp | Greenville | $0 | 2026-01-10 |
| Pennwood Estates Mhp-Front Treatment Bldg | Bethlehem | $0 | |
| Reynolds Water Company | Greenville | $0 | |
| Wheatland Tube Council Ave Plt/Wheatland Tube Llc | Wheatland | $0 | 2024-02-22 |
| Cathleen M & Edward W Fisher Srstp | Transfer | $0 | 2025-11-12 |
| Fairview Swiss Cheese | Fredonia | $0 | 2025-11-19 |
| Greenville Mhp - Pumphouse | Greenville | $0 | 2025-05-16 |