EPA Air · stack tests by state, industry and year
Mining support (NAICS 2131): stack tests in Pennsylvania, 2026
- 35Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row is one stack test recorded during 2026 at a Pennsylvania source whose primary industry code is NAICS 2131. A facility filing more than one industry code is counted under the first one on its record.
Mining support (NAICS 2131) in Pennsylvania, other years
Other industries in Pennsylvania, 2026
- Oil and gas extraction (NAICS 2111) 291
- Pipeline transportation (NAICS 4862) 31
- Utilities (NAICS 2211) 23
- Educational services (NAICS 6113) 9
- Chemical manufacturing (NAICS 3251) 8
- Waste management and remediation (NAICS 5622) 7
- Primary metal manufacturing (NAICS 3311) 7
- Merchant wholesalers, nondurable goods (NAICS 4247) 5
- National security and international affairs (NAICS 9281) 5
- Utilities (NAICS 2213) 5
- Chemical manufacturing (NAICS 3254) 5
- Petroleum and coal products manufacturing (NAICS 3241) 5
- Nonmetallic mineral product manufacturing (NAICS 3274) 4
- Nonmetallic mineral product manufacturing (NAICS 3273) 4
- Paper manufacturing (NAICS 3221) 4
- Primary metal manufacturing (NAICS 3315) 4
- Administration of environmental programs (NAICS 9241) 4
- Plastics and rubber products manufacturing (NAICS 3261) 3
- Mining and quarrying (NAICS 2121) 3
- Hospitals (NAICS 6221) 3
Air-emissions stack tests recorded in Pennsylvania, 2026
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2026-07-23 | MARKWEST LIBERTY BLUESTONE LLC/TRILLITH COMP STA | HARMONY, Butler, PA | Pass | State |
| 2026-07-15 | RANGE RESOURCES APPALACHIA LLC/17 - 22 WELL PAD | TROUT RUN, Lycoming, PA | Pass | State |
| 2026-07-15 | RANGE RESOURCES APPALACHIA LLC/17 - 22 WELL PAD | TROUT RUN, Lycoming, PA | Pass | State |
| 2026-06-24 | SOUTHWESTERN ENERGY CO/RACINE 5H | NEW MILFORD, Susquehanna, PA | Pass | State |
| 2026-06-23 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/NANCY STEWART | MOUNT PLEASANT, Washington, PA | Pass | State |
| 2026-06-19 | CNX MIDSTREAM OPR CO LLC /MORRIS DEHY STATION | GRAYSVILLE, Greene, PA | Pass | State |
| 2026-06-18 | SUSQUEHANNA GATHERING CO 1 LLC/CDP 3 | NEW MILFORD, Susquehanna, PA | Pass | State |
| 2026-06-17 | EQT PROD CO/MOJO COMPRESSOR UNIT | WASHINGTON, Washington, PA | Pass | State |
| 2026-06-17 | NFG MIDSTREAM TROUT RUN LLC/HAGERMAN GAS & PROC METERING FAC | TROUT RUN, Lycoming, PA | Pass | State |
| 2026-06-11 | PA GEN ENERGY CO LLC/FISK HOLLOW PAD A | ROULETTE, Potter, PA | Pass | State |
| 2026-06-05 | EXPAND OPERATING LLC/ROSIEMAR SUS PAD | MESHOPPEN, Susquehanna, PA | Pass | State |
| 2026-06-03 | SOUTHWESTERN ENERGY CO/KOZIOL 5H-6H | NEW MILFORD, Susquehanna, PA | Pass | State |
| 2026-06-03 | BOLLES COMPRESSOR STATION/JESSUP TWP | MONTROSE, Susquehanna, PA | Pass | State |
| 2026-05-05 | RANGE RESOURCES APPALACHIA/LAUREL HILL D 17531 PAD | TROUT RUN, Lycoming, PA | Pass | State |
| 2026-04-29 | HILCORP ENERGY CO/LACKAWANNOCK LARMON CTL FAC | MERCER, Mercer, PA | Pass | State |
| 2026-04-20 | HILCORP ENERGY CO/MAHONING SIEGEL FACILITY — high-priority violation on file | EDINBURG, Lawrence, PA | Pass | State |
| 2026-04-17 | HILCORP ENERGY CO/LACKAWANNOCK LARMON CTL FAC | MERCER, Mercer, PA | Pending | State |
| 2026-04-07 | WPX ENERGY APPALACHIA LLC/POWERS SITE | MONTROSE, Susquehanna, PA | Pass | State |
| 2026-04-01 | MARKWEST LIBERTY MIDSTREAM/DRYER BOOSTER COMP STA | AVELLA, Washington, PA | Pass | State |
| 2026-04-01 | SOUTHWESTERN ENERGY CO/TNT LIMITED PARTNERSHIP WEST 6H | NEW MILFORD, Susquehanna, PA | Pass | State |
| 2026-03-17 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/FULTON BOOSTER STA — high-priority violation on file | HICKORY, Washington, PA | Pass | State |
| 2026-03-10 | BOLLES COMPRESSOR STATION/JESSUP TWP | MONTROSE, Susquehanna, PA | Pass | State |
| 2026-02-25 | EXPAND OPERATING LLC/RU-46 DROPP WELLPAD | SUSQUEHANNA, Susquehanna, PA | Pass | State |
| 2026-02-25 | EXPAND OPERATING LLC/RU-71 BLUE BECK WELLPAD | MILFORD, Susquehanna, PA | Pass | State |
| 2026-02-19 | SUSQUEHANNA GATHERING CO 1 LLC/CDP 2 | NEW MILFORD, Susquehanna, PA | Pass | State |
| 2026-02-12 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/NANCY STEWART | MOUNT PLEASANT, Washington, PA | Pass | State |
| 2026-02-12 | REPSOL OIL & GAS USA LLC/WATKINS HILL RD | COLUMBIA CROSS ROADS, Bradford, PA | Pass | State |
| 2026-02-09 | XTO ENERGY INC/WINSLOW | REYNOLDSVILLE, Jefferson, PA | Pass | State |
| 2026-02-05 | SUSQ HUCKLEBERRY PAD C | ROARING BRANCH, Tioga, PA | Pass | State |
| 2026-01-21 | EQM GATHERING OPCO LLC/PIPERS RIDGE INTERCONNECT | WAYNESBURG, Greene, PA | Pass | State |
| 2026-01-19 | EQM GATHERING OPCO LLC/HOPEWELL RIDGE INTERCONNECT STA | SYCAMORE, Greene, PA | Pass | State |
| 2026-01-13 | SWN PRODUCTION CO LLC/KING NORTH 3H | NEW MILFORD, Susquehanna, PA | Pass | State |
| 2026-01-12 | INFINITY NATURAL RESOURCES SOUTH BEND COMP STA | SOUTH BEND TWP, Armstrong, PA | Pass | State |
| 2026-01-05 | DELTA WELL SITE — high-priority violation on file | LINDEN, Lycoming, PA | Pass | State |
| 2026-01-02 | EXPAND OPERATING LLC/LIGHTCAP BRA PAD | FORKSVILLE, Bradford, PA | Pass | State |
Primary NAICS code as filed on the facility record; dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.