EPA Air · stack tests by state and year
Air-emissions stack tests in Pennsylvania, 2024
- 905Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Every stack test below was recorded against a source in Pennsylvania during 2024; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in Pennsylvania, 2024
- Susquehanna County 136
- Washington County 66
- Bradford County 54
- Allegheny County 52
- Philadelphia County 44
- Lycoming County 43
- Greene County 40
- Tioga County 37
- Wyoming County 27
- Armstrong County 24
- Butler County 23
- Westmoreland County 19
- Indiana County 18
- Lancaster County 18
- Beaver County 17
- Luzerne County 16
- Delaware County 16
- Montgomery County 16
- Berks County 14
- McKean County 12
- Schuylkill County 12
- Fayette County 12
- Northampton County 10
- York County 10
- Jefferson County 10
- Dauphin County 9
- Mercer County 9
- Clinton County 8
- Lawrence County 8
- Bucks County 8
- Chester County 7
- Montour County 7
- Potter County 7
- Cambria County 6
- Lackawanna County 6
- Juniata County 5
- Erie County 5
- Centre County 5
- Carbon County 5
- Crawford County 5
- Elk County 5
- Cumberland County 4
- Columbia County 4
- Venango County 4
- Blair County 4
- Clarion County 4
- Somerset County 4
- Clearfield County 3
- Warren County 3
- Adams County 3
- Sullivan County 3
- Franklin County 3
- Huntingdon County 3
Pennsylvania, other years
Air-emissions stack tests recorded in Pennsylvania, 2024
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2024-07-23 | COTERRA ENERGY INC/MYERS R PAD 1 | HOP BOTTOM, Susquehanna, PA | Fail | State |
| 2024-07-22 | EQM GATHERING OPCO LLC/TWILIGHT COMP STA | DAISYTOWN, Washington, PA | Pass | State |
| 2024-07-22 | COTERRA ENERGY INC/BURKE G PAD 1 | MESHOPPEN, Susquehanna, PA | Pass | State |
| 2024-07-19 | COLUMBIA GAS TRANS CORP/DONEGAL COMP STA | WEST ALEXANDER, Washington, PA | Pass | State |
| 2024-07-19 | HEP PENNSYLVANIA GATHERING LLC/WHITE CPF 1 COMP STA | STEVENSVILLE, Bradford, PA | Pass | State |
| 2024-07-19 | LACKAWANNA ENERGY CTR LLC/JESSUP — high-priority violation on file | JESSUP, Lackawanna, PA | Pass | State |
| 2024-07-19 | NAVAL SURFACE WARFARE CENTER - PHILADELPHIA DIVISION | PHILADELPHIA, Philadelphia, PA | Pass | Local |
| 2024-07-19 | NAVAL SURFACE WARFARE CENTER - PHILADELPHIA DIVISION | PHILADELPHIA, Philadelphia, PA | Pass | Local |
| 2024-07-18 | COLUMBIA GAS TRANS LLC/ARTEMAS COMP STA | ARTEMAS, Bedford, PA | Pass | State |
| 2024-07-18 | MARKWEST LIBERTY MIDSTREAM/WELLING COMP STA | CLAYSVILLE, Washington, PA | Pass | State |
| 2024-07-18 | LONGHORN PAD C/ELK | WEEDVILLE, Elk, PA | Pass | State |
| 2024-07-17 | PEI POWER CORP/ARCHBALD | ARCHBALD, Lackawanna, PA | Pass | State |
| 2024-07-17 | CLEVELAND CLIFFS STEEL CORP/ BUTLER WORKS | BUTLER, Butler, PA | Pass | State |
| 2024-07-17 | MARKWEST LIBERTY MIDSTREAM/ CARPENTER COMP STA | WEST ALEXANDRIA, Washington, PA | Pass | State |
| 2024-07-17 | LACKAWANNA ENERGY CTR LLC/JESSUP — high-priority violation on file | JESSUP, Lackawanna, PA | Pass | State |
| 2024-07-17 | EQUITRANS LP/REDHOOK COMPRESSOR STATION | WAYNESBURG, Greene, PA | Pass | State |
| 2024-07-17 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/HARMON CREEK GAS PLT — high-priority violation on file | BULGER, Washington, PA | Pass | State |
| 2024-07-16 | EASTERN GAS TRANS & STORAGE/CRAYNE STA | WAYNESBURG, Greene, PA | Pass | State |
| 2024-07-16 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/JOHNSTON COMP STA | CANONSBURG, Washington, PA | Pass | State |
| 2024-07-16 | PINE RUN MIDSTREAM LLC/BASS COMP STA | SAXONBURG, Butler, PA | Pass | State |
| 2024-07-16 | EXPAND OPERATING LLC/N-24 BUCKHORN WELL PAD | MONTROSE, Susquehanna, PA | Pass | State |
| 2024-07-15 | HEP PA GATHERING LLC/GREENZWEIG COMP STA | WYALUSING, Bradford, PA | Pass | State |
| 2024-07-12 | USS/CLAIRTON WORKS — high-priority violation on file | CLAIRTON, Allegheny, PA | Pass | Local |
| 2024-07-11 | DELAWARE CNTY REG WA/DELCORA WESTERN REG TRMT PLT | CHESTER, Delaware, PA | Pass | State |
| 2024-07-11 | COLUMBIA GAS TRANS CORP/WAYNESBURG COMP STA | WAYNESBURG, Greene, PA | Pass | State |
| 2024-07-11 | PA STATE UNIV/MILTON S HERSHEY MED CTR | HERSHEY, Dauphin, PA | Pass | State |
| 2024-07-11 | SEWARD GENERATING STATION/SEWARD | NEW FLORENCE, Indiana, PA | Pass | State |
| 2024-07-11 | APPALACHIA MIDSTREAM SVC LLC/RATTLESNAKE HILL COMP STA | AUBURN TOWNSHIP, Susquehanna, PA | Pass | State |
| 2024-07-11 | USS/CLAIRTON WORKS — high-priority violation on file | CLAIRTON, Allegheny, PA | Pass | Local |
| 2024-07-11 | MCCONWAY & TORLEY LLC/STEEL CASTINGS MFG | PITTSBURGH, Allegheny, PA | Fail | Local |
| 2024-07-10 | COLUMBIA GAS TRANS CORP/FORKS TWP FAC EASTON CTA | EASTON, Northampton, PA | Pass | State |
| 2024-07-10 | EASTERN GAS TRANS & STORAGE INC/SABINSVILLE STA | WESTFIELD, Tioga, PA | Pass | State |
| 2024-07-10 | SEWARD GENERATING STATION/SEWARD | NEW FLORENCE, Indiana, PA | Pass | State |
| 2024-07-10 | APPALACHIA MIDSTREAM SVC LLC/RATTLESNAKE HILL COMP STA | AUBURN TOWNSHIP, Susquehanna, PA | Pass | State |
| 2024-07-10 | EQM GATHERING OPCO LLC/BLUE MOON COMP STA | DAISYTOWN, Washington, PA | Pass | State |
| 2024-07-09 | LAUREL MTN MIDSTREAM OPR LLC/PRAH COMP STA | MCCLELLANDTOWN, Fayette, PA | Pass | State |
| 2024-07-09 | HEP PENNSYLVANIA GATHERING LLC/CLARK CPF 1 COMP STA | WYSOX, Bradford, PA | Pass | State |
| 2024-07-09 | NFG MIDSTREAM COVINGTON LLC/BREON COMP STA | MANSFIELD, Tioga, PA | Pass | State |
| 2024-07-08 | LAUREL MTN MIDSTREAM OPR LLC/BROWN COMP STA | GREENSBORO, Greene, PA | Pass | State |
| 2024-07-08 | DIVERSIFIED PROD LLC/ECKHARDT COMP STA | ROCKWOOD, Somerset, PA | Pass | State |
| 2024-07-03 | SOUTHWESTERN ENERGY CO/KOZIOL 5H-6H | NEW MILFORD, Susquehanna, PA | Pass | State |
| 2024-07-03 | EXPAND OPERATING LLC/RU-06 FLOHS PAD | NEW MILFORD, Susquehanna, PA | Pass | State |
| 2024-07-02 | REGENCY MARCELLUS GAS GATHERING LLC/POORMAN COMP STA | LOCK HAVEN, Clinton, PA | Pass | State |
| 2024-07-01 | RW GATHERING LLC/SALEM COMP STA | DERRY, Westmoreland, PA | Pass | State |
| 2024-07-01 | REGENCY MARCELLUS GAS GATHERING LLC/ROUPP COMP STA | MIFFLIN, Lycoming, PA | Pass | State |
| 2024-06-28 | BLOMMER CHOCOLATE CO/E GREENVILLE PLT | EAST GREENVILLE, Montgomery, PA | Pass | State |
| 2024-06-28 | US GYPSUM CO/WASHINGTONVILLE PLT — high-priority violation on file | DANVILLE, Montour, PA | Pass | State |
| 2024-06-27 | RAUSCH CREEK GENERATION LLC/FRAILEY TWP — high-priority violation on file | TREMONT, Schuylkill, PA | Pass | State |
| 2024-06-27 | PINE RUN MIDSTREAM LLC/TROUT COMP STA | WORTHINGTON, Armstrong, PA | Pass | State |
| 2024-06-27 | PINE RUN MIDSTREAM LLC/TROUT COMP STA | WORTHINGTON, Armstrong, PA | Pass | State |
| 2024-06-27 | ADVANSIX (FORMERLY HONEYWELL/FRANKFORD PLT) — high-priority violation on file | PHILADELPHIA, Philadelphia, PA | Incomplete | Local |
| 2024-06-26 | PINE RUN MIDSTREAM LLC/BASS COMP STA | SAXONBURG, Butler, PA | Pass | State |
| 2024-06-26 | PEOPLES NATURAL GAS CO LLC/REDBANK COMP STA | FAIRMONT CITY, Clarion, PA | Pass | State |
| 2024-06-26 | COP TRACT 596 PAD A | ROARING BRANCH, Tioga, PA | Pass | State |
| 2024-06-25 | ARDAGH GLASS INC/PORT ALLEGANY PLT — high-priority violation on file | PORT ALLEGANY, McKean, PA | Pass | State |
| 2024-06-25 | SHELL CHEM APPALACHIA/SHELL POLYMERS MONACA — high-priority violation on file | MONACA, Beaver, PA | Pass | State |
| 2024-06-25 | EQM GATHERING OPCO LLC/MAKO COMP STA | AMWELL, Washington, PA | Pass | State |
| 2024-06-25 | EXPAND OPERATING LLC/MARCUCCI JONES PAD | STEVENSVILLE, Bradford, PA | Pass | State |
| 2024-06-24 | ROUNDTOP ENERGY/AUBURN | YARDLEY, Susquehanna, PA | Pass | State |
| 2024-06-24 | DTM APPALACHIA GATHERING LLC/AGS BOOSTER STATION | WAYNESBURG, Greene, PA | Pass | State |
| 2024-06-21 | MARSHALLS NE DISTRIBUTION CENTER | PHILADELPHIA, Philadelphia, PA | Pass | Local |
| 2024-06-20 | US BRONZE FOUNDRY & MACHINE INC/US BRONZE | MEADVILLE, Crawford, PA | Pass | State |
| 2024-06-20 | BEFESA ZINC US INC./PALMERTON — high-priority violation on file | PALMERTON, Carbon, PA | Pass | State |
| 2024-06-20 | YORK CNTY SOLID WASTE/YORK CNTY RESOURCE RECOVERY — high-priority violation on file | YORK, York, PA | Pass | State |
| 2024-06-20 | CNX MIDSTREAM OPR CO LLC /MORRIS DEHY STATION | GRAYSVILLE, Greene, PA | Pass | State |
| 2024-06-20 | LOAN ASSET ISSUER LLC/WEST FINLEY 10 WELL PAD | WEST FINLEY, Washington, PA | Pass | State |
| 2024-06-20 | MARSHALLS NE DISTRIBUTION CENTER | PHILADELPHIA, Philadelphia, PA | Pass | Local |
| 2024-06-19 | PEOPLES NATURAL GAS CO LLC/VALLEY STA | YATESBORO, Armstrong, PA | Pass | State |
| 2024-06-19 | LANCASTER CNTY SWMA/SUSQ RESOURCE MGMT COMPLEX — high-priority violation on file | HARRISBURG, Dauphin, PA | Pass | State |
| 2024-06-19 | EXPAND OPERATING LLC/VALENTINE CPF 1 | CLIFFORD, Susquehanna, PA | Pass | State |
| 2024-06-19 | LOAN ASSET ISSUER LLC/WEST FINLEY 5 WELL PAD | WEST FINLEY, Washington, PA | Pass | State |
| 2024-06-19 | MARSHALLS NE DISTRIBUTION CENTER | PHILADELPHIA, Philadelphia, PA | Pass | Local |
| 2024-06-18 | EASTERN GAS TRANS & STORAGE INC/CHERRY TREE COMP STA | CHERRY TREE, Indiana, PA | Pass | State |
| 2024-06-18 | LOAN ASSET ISSUER LLC/WEST FINLEY 1 WELL PAD | WEST FINLEY, Washington, PA | Pass | State |
| 2024-06-18 | EXPAND OPERATING LLC/CAPPUCCI WELL PAD | MEHOOPANY, Wyoming, PA | Pass | State |
| 2024-06-18 | EXPAND OPERATING LLC/BLYE WELL PAD | MONTROSE, Susquehanna, PA | Pass | State |
| 2024-06-18 | NORTHEAST PAVING COMPANY / BRIDGEVILLE ASPHALT PLANT | BRIDGEVILLE, Allegheny, PA | Pass | Local |
| 2024-06-18 | MARSHALLS NE DISTRIBUTION CENTER | PHILADELPHIA, Philadelphia, PA | Pass | Local |
| 2024-06-17 | DIVERSIFIED PRODUCTION LLC - MALONE CS | SALTSBURG, Indiana, PA | Pass | State |
| 2024-06-17 | DIVERSIFIED PRODUCTION LLC SPURLIN CS | INDIANA, Indiana, PA | Pass | State |
| 2024-06-17 | EXPAND OPER LLC/ROLAND BRA PAD | WILMONT, Bradford, PA | Pass | State |
| 2024-06-17 | EXPAND OPERATING LLC/PARKHURST SUS PAD | MESHOPPEN, Susquehanna, PA | Pass | State |
| 2024-06-14 | CRODA INC/DRAKETOWN ROAD | MILL HALL, Clinton, PA | Pass | State |
| 2024-06-14 | ERVIN IND INC/AMASTEEL DIVISION | BUTLER, Butler, PA | Pass | State |
| 2024-06-13 | HEIDELBERG MATERIALS US CEMENT LLC/NAZARETH | NAZARETH, Northampton, PA | Pass | State |
| 2024-06-13 | LIBERTY ELEC POWER LLC/EDDYSTONE PLT | EDDYSTONE, Delaware, PA | Pass | State |
| 2024-06-13 | PEOPLES NATURAL GAS CO LLC/BELKNAP COMP STA | DAYTON, Armstrong, PA | Pass | State |
| 2024-06-13 | SHELL CHEM APPALACHIA/SHELL POLYMERS MONACA — high-priority violation on file | MONACA, Beaver, PA | Pass | State |
| 2024-06-13 | BLUESTONE PIPELINE/CDP#1-A | NEW MILFORD, Susquehanna, PA | Pass | State |
| 2024-06-13 | XPRESS NATURAL GAS LLC/MONTROSE — high-priority violation on file | MONTROSE, Susquehanna, PA | Pass | State |
| 2024-06-12 | REWORLD DELAWARE VALLEY LP/DELAWARE VALLEY RES REC — high-priority violation on file | CHESTER, Delaware, PA | Pass | State |
| 2024-06-12 | UGI TEXAS CREEK LLC/THOMAS 808 FAC | ELK TOWNSHIP, Tioga, PA | Pass | State |
| 2024-06-12 | UGI TEXAS CREEK LLC/PIERSON 810 COMP STA | GAINES, Tioga, PA | Pass | State |
| 2024-06-11 | ADVANCED CAST PRODUCTS/MEADVILLE — high-priority violation on file | MEADVILLE, Crawford, PA | Pending | State |
| 2024-06-11 | UGI TEXAS CREEK LLC/CLEGG COMP STA | TROUT RUN, Lycoming, PA | Pass | State |
| 2024-06-11 | UGI TEXAS CREEK LLC/CASTLE COMP STA | CANTON, Bradford, PA | Pass | State |
| 2024-06-10 | YORK CNTY SOLID WASTE/YORK CNTY RESOURCE RECOVERY — high-priority violation on file | YORK, York, PA | Pass | State |
| 2024-06-10 | UGI TEXAS CREEK LLC/TRIMBLE COMP STA | ROARING BRANCH, Tioga, PA | Pass | State |
| 2024-06-10 | BLUESTONE PIPELINE CO OF PA CDP#5/HARFORD TWP | NEW MILFORD, Susquehanna, PA | Pass | State |
| 2024-06-10 | ALLEGHENY CNTY SANI AUTH/ALLEGHENY CNTY | PITTSBURGH, Allegheny, PA | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.