EPA Air · violations by county and year
High-priority air violations in Butler County, Pennsylvania, 2025
- 4Violations
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 Butler 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 Butler County facility page.
Butler County, Pennsylvania, 2025
- Inspections 99
- Stack tests 30
High-priority air violations in Butler County, other years
High-priority air violations recorded in Butler County, Pennsylvania, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-07-28 | ONEIDA VALLEY MIDSTRAM LLC/CONSTELLATION COMP STA | Earliest FRV determination | State |
| 2025-04-03 | ARMSTRONG CEMENT & SUPPLY/WINFIELD — high-priority violation on file | HPV day-zero determination | State |
| 2025-03-11 | OPTA USA INC/OPTA MYOMA PLT — high-priority violation on file | Earliest FRV determination | State |
| 2025-01-15 | LUXFER MAGTECH SAXONBURG PLT | Earliest FRV determination | State |
Dates as filed by the agency that recorded the violation. Figures from EPA’s ICIS-AIR download.