EPA Air · stack tests by county and year
Air-emissions stack tests in Allegheny County, Pennsylvania, 2025
- 17Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row below is one stack test recorded against a source in Allegheny 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 Allegheny County facility page.
Allegheny County, Pennsylvania, 2025
- Inspections 18
Air-emissions stack tests in Allegheny County, other years
Air-emissions stack tests recorded in Allegheny County, Pennsylvania, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-09-04 | USS/CLAIRTON WORKS — high-priority violation on file | Pass | Local |
| 2025-08-26 | ALTA PERFORMANCE MATERIALS US, LLC | Pass | Local |
| 2025-08-20 | USS/CLAIRTON WORKS — high-priority violation on file | Pass | Local |
| 2025-06-27 | CORAOPOLIS TERMINALS DE LLC | Pass | Local |
| 2025-06-26 | USS/CLAIRTON WORKS — high-priority violation on file | Pass | Local |
| 2025-06-25 | CORAOPOLIS TERMINALS DE LLC | Pass | Local |
| 2025-06-12 | ALLEGHENY ENERGY SUPPLY/SPRINGDALE | Pass | Local |
| 2025-06-11 | USS/CLAIRTON WORKS — high-priority violation on file | Pass | Local |
| 2025-06-11 | ALLEGHENY ENERGY SUPPLY/SPRINGDALE | Pending | Local |
| 2025-06-05 | USS/CLAIRTON WORKS — high-priority violation on file | Pass | Local |
| 2025-05-28 | CHAMBERS DEV CO INC/MONROEVILLE | Pass | Local |
| 2025-05-13 | ALLEGHENY LUDLUM LLC/BRACKENRIDGE | Pass | Local |
| 2025-04-23 | MAGNUS PRODUCTS, LLC AT US STEEL - EDGAR THOMSON — high-priority violation on file | Fail | Local |
| 2025-01-30 | USS CORP/EDGAR THOMSON WORKS — high-priority violation on file | Fail | Local |
| 2025-01-29 | USS CORP/EDGAR THOMSON WORKS — high-priority violation on file | Fail | Local |
| 2025-01-10 | USS CORP/EDGAR THOMSON WORKS — high-priority violation on file | Pass | Local |
| 2025-01-09 | USS CORP/EDGAR THOMSON WORKS — high-priority violation on file | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.