EPA Air · stack tests by county and year
Air-emissions stack tests in Elk County, Pennsylvania, 2026
- 6Stack 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 Elk 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 Elk County facility page.
Elk County, Pennsylvania, 2026
- Inspections 45
Air-emissions stack tests in Elk County, other years
Air-emissions stack tests recorded in Elk County, Pennsylvania, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-06-22 | LONGHORN PAD C/ELK | Pass | State |
| 2026-05-13 | KC MIDSTREAM SOLUTIONS LLC/OVERBEK STA | Pass | State |
| 2026-04-13 | DOMTAR PAPER CO/JOHNSONBURG MILL — high-priority violation on file | Pass | State |
| 2026-04-01 | NFG MIDSTREAM CLERMONT LLC/CLERMONT WEST COMP STA | Pass | State |
| 2026-03-27 | SGL CARBON CORP/ST MARYS PLT | Pending | State |
| 2026-01-12 | NFG MIDSTREAM CLERMONT LLC/CLERMONT WEST COMP STA | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.