EPA Air · stack tests by county and year
Air-emissions stack tests in Allegheny County, Pennsylvania, 2026
- 13Stack 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 2026. 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, 2026
- Inspections 11
Air-emissions stack tests in Allegheny County, other years
Air-emissions stack tests recorded in Allegheny County, Pennsylvania, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-08-04 | ALTA PERFORMANCE MATERIALS US, LLC | Pass | Local |
| 2026-06-19 | USS/CLAIRTON WORKS — high-priority violation on file | Pass | Local |
| 2026-05-14 | USS/CLAIRTON WORKS — high-priority violation on file | Pass | Local |
| 2026-05-07 | USS/CLAIRTON WORKS — high-priority violation on file | Pass | Local |
| 2026-04-02 | BUCKEYE TERMINALS, LLC/INDIANOLA | Pass | Local |
| 2026-04-02 | ALLEGHENY CNTY SANI AUTH/ALLEGHENY CNTY | Pass | Local |
| 2026-02-20 | USS/CLAIRTON WORKS — high-priority violation on file | Pass | Local |
| 2026-02-18 | USS/CLAIRTON WORKS — high-priority violation on file | Pass | Local |
| 2026-02-04 | US STEEL CORP/IRVIN PLT | Pass | Local |
| 2026-02-02 | US STEEL CORP/IRVIN PLT | Pass | Local |
| 2026-01-30 | UNIV OF PGH/PGH CAMPUS | Pending | Local |
| 2026-01-29 | UNIV OF PGH/PGH CAMPUS | Pass | Local |
| 2026-01-29 | UNIV OF PGH/PGH CAMPUS | Pending | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.