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.
What this page shows
This page covers Clean Air Act facilities in the EPA air register with stack tests in Elk county, PA, in 2026. Stack tests recorded in 2026: 6.