EPA Air · violations by county and year
High-priority air violations in Mercer County, Pennsylvania, 2025
- 15Violations
A high-priority violation is the most serious class of Clean Air Act non-compliance an agency records against a source; a federally reportable violation is the next step down in severity. Each row below is one violation recorded against a source in Mercer County, Pennsylvania during 2025. A facility can appear several times: this is the year’s record of what happened, not a list of places. The sources themselves are on the Mercer County facility page.
Mercer County, Pennsylvania, 2025
- Inspections 93
- Stack tests 18
High-priority air violations in Mercer County, other years
High-priority air violations recorded in Mercer County, Pennsylvania, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-11-19 | NLMK PENNSYLVANIA LLC/FARRELL PLT — high-priority violation on file | Earliest FRV determination | State |
| 2025-10-30 | JMG ENERGY LLC/DEER CREEK COMP STA — high-priority violation on file | Earliest FRV determination | State |
| 2025-10-30 | WYCOMP LLC/FAIRVIEW TWP COMP STA — high-priority violation on file | Earliest FRV determination | State |
| 2025-09-11 | NLMK PENNSYLVANIA LLC/FARRELL PLT — high-priority violation on file | HPV day-zero determination | State |
| 2025-09-08 | HILCORP ENERGY CO/JEFFERSON MCCULLOUGH WELL PAD | Earliest FRV determination | State |
| 2025-08-29 | SMYRNA READY MIX CONCRETE/SHENANGO TWP | Earliest FRV determination | State |
| 2025-08-18 | OWS ACQUISITIONS CO LLC/COLLINS COMP STA | Earliest FRV determination | State |
| 2025-08-18 | OWS ACQUISITION CO LLC/CYPHERT COMP STA | Earliest FRV determination | State |
| 2025-08-07 | HERMITAGE MUNI AUTH/HERMITAGE WPCP | Earliest FRV determination | State |
| 2025-08-07 | NLMK PENNSYLVANIA LLC/FARRELL PLT — high-priority violation on file | Earliest FRV determination | State |
| 2025-07-25 | OWS ACQUISITIONS CO LLC/COLLINS COMP STA | Earliest FRV determination | State |
| 2025-06-18 | PENNEX ALUM CO/GREENVILLE PLT | Earliest FRV determination | State |
| 2025-06-09 | WHEATLAND TUBE COUNCIL AVE PLT/WHEATLAND TUBE LLC — high-priority violation on file | HPV day-zero determination | State |
| 2025-03-03 | SANDY CREEK CREMATION & MONUMENT CO/MERCER | Earliest FRV determination | State |
| 2025-03-03 | GREENVILLE METALS INC/TRANSFER | Earliest FRV determination | State |
Dates as filed by the agency that recorded the violation. Figures from EPA’s ICIS-AIR download.