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 |
|---|---|---|---|---|
| 2024-08-22 | ETC NORTHEAST PIPELINE/GALAXY COMP STA | PARKER, Butler, PA | Pass | State |
| 2024-08-22 | LEBANON CO DEPT EMER SVCS/LEBANON | LEBANON, Lebanon, PA | Pass | State |
| 2024-08-21 | ALTOONA TERM DE LLC/ALTOONA | DUNCANSVILLE, Blair, PA | Pass | State |
| 2024-08-21 | LAUREL MTN MIDSTREAM OPR LLC/HERMINIE COMP STA | WEST NEWTON, Westmoreland, PA | Pass | State |
| 2024-08-21 | MTN GATHERING LLC/JEFFERSON COMP STA | BUTLER, Butler, PA | Pass | State |
| 2024-08-21 | MTN GATHERING LLC/JEFFERSON COMP STA | BUTLER, Butler, PA | Pass | State |
| 2024-08-21 | SOUTHWESTERN ENERGY CO/SCARLET OAK 1H | NEW MILFORD, Susquehanna, PA | Pass | State |
| 2024-08-21 | SUSQUEHANNA GATHERING/NORTH RANGE CPF 1 COMP STA | SUSQUEHANNA, Susquehanna, PA | Pass | State |
| 2024-08-21 | ADVANSIX (FORMERLY HONEYWELL/FRANKFORD PLT) — high-priority violation on file | PHILADELPHIA, Philadelphia, PA | Pass | Local |
| 2024-08-21 | ADVANSIX (FORMERLY HONEYWELL/FRANKFORD PLT) — high-priority violation on file | PHILADELPHIA, Philadelphia, PA | Pass | Local |
| 2024-08-20 | COLUMBIA GAS TRANS CORP/FORKS TWP FAC EASTON CTA | EASTON, Northampton, PA | Pending | State |
| 2024-08-20 | PEOPLES NATURAL GAS CO LLC/LIMESTONE COMP STA | SUMMERVILLE, Clarion, PA | Pass | State |
| 2024-08-20 | APPALACHIA MIDSTREAM SVC LLC/LIBERTY COMP STA | TOWANDA, Bradford, PA | Pass | State |
| 2024-08-20 | EQM GATHERING OPCO LLC/CALLISTO COMP STA | SYCAMORE, Greene, PA | Pass | State |
| 2024-08-20 | ETC NORTHEAST FLD SVC LLC/PIKE COMP STA | ROCHESTER, Beaver, PA | Pass | State |
| 2024-08-20 | ADVANSIX (FORMERLY HONEYWELL/FRANKFORD PLT) — high-priority violation on file | PHILADELPHIA, Philadelphia, PA | Pass | Local |
| 2024-08-19 | ADVANSIX (FORMERLY HONEYWELL/FRANKFORD PLT) — high-priority violation on file | PHILADELPHIA, Philadelphia, PA | Pass | Local |
| 2024-08-16 | UNITED REFINING CO/WARREN PLT | WARREN, Warren, PA | Pass | State |
| 2024-08-16 | MTN GATHERING LLC/FORWARD COMP STA | RENFREW, Butler, PA | Pass | State |
| 2024-08-16 | WARREN EP INC/REIMILLER PAD | MESHOPPEN, Wyoming, PA | Pass | State |
| 2024-08-15 | US GYPSUM CO/WASHINGTONVILLE PLT — high-priority violation on file | DANVILLE, Montour, PA | Pending | State |
| 2024-08-15 | CNX MIDSTREAM OPR CO LLC/NV-57 COMP STA | PROSPERITY, Washington, PA | Pass | State |
| 2024-08-15 | BKV OPR LLC/PLUSHANSKI WELL PAD | TUNKHANNOCK, Wyoming, PA | Pass | State |
| 2024-08-15 | BKV OPR LLC/MIRABELLI PAD | TUNKHANNOCK, Wyoming, PA | Pass | State |
| 2024-08-15 | BLACKHILL ENERGY LLC/YOUNG COMP STA — high-priority violation on file | COLUMBIA CROSS ROADS, Bradford, PA | Pass | State |
| 2024-08-14 | HEIDELBERG MATERIALS US CEMENT LLC/EVANSVILLE CEMENT PLT & Q — high-priority violation on file | FLEETWOOD, Berks, PA | Pass | State |
| 2024-08-14 | COLUMBIA GAS TRANS CORP/MILFORD COMP STA | MILFORD, Pike, PA | Pass | State |
| 2024-08-14 | KEYSTONE CONEMAUGH PROJ LLC/CONEMAUGH STATION | NEW FLORENCE, Indiana, PA | Pass | State |
| 2024-08-14 | APPALACHIA MIDSTREAM SVC LLC/CHERRY COMP STA | DUSHORE, Sullivan, PA | Pass | State |
| 2024-08-14 | BLACKHILL ENERGY LLC/BEARDSLEE COMP STA | TROY, Bradford, PA | Pass | State |
| 2024-08-14 | SEVEN MILE MINERALS/MCKEAN | KANE, McKean, PA | Pass | State |
| 2024-08-14 | COP TRACT 596 PAD A | ROARING BRANCH, Tioga, PA | Pass | State |
| 2024-08-14 | ADVANSIX (FORMERLY HONEYWELL/FRANKFORD PLT) — high-priority violation on file | PHILADELPHIA, Philadelphia, PA | Pass | Local |
| 2024-08-13 | US DOD/RAVEN ROCK MTN COMPLEX | BLUE RIDGE SUMMIT, Adams, PA | Pass | State |
| 2024-08-13 | PEOPLES NATURAL GAS CO/ARNOLD COMP STA | NEW KENSINGTON, Westmoreland, PA | Pass | State |
| 2024-08-13 | BLACKHILL ENERGY LLC/BRADFORD CNTY COMP STA | COLUMBIA CROSS ROADS, Bradford, PA | Pass | State |
| 2024-08-13 | EQM GATHERING OPCO LLC/CYGRYMUS COMP STA | NEW FREEPORT, Greene, PA | Pass | State |
| 2024-08-13 | XTO ENERGY PATTON UNIT PAD/BUTLER | PROSPECT, Butler, PA | Pass | State |
| 2024-08-13 | XTO ENERGY GEIBEL WELLPAD/BUTLER | BUTLER, Butler, PA | Pass | State |
| 2024-08-13 | ADVANSIX (FORMERLY HONEYWELL/FRANKFORD PLT) — high-priority violation on file | PHILADELPHIA, Philadelphia, PA | Pass | Local |
| 2024-08-12 | ADVANSIX (FORMERLY HONEYWELL/FRANKFORD PLT) — high-priority violation on file | PHILADELPHIA, Philadelphia, PA | Pass | Local |
| 2024-08-09 | KEYSTONE CONEMAUGH PROJ LLC/KEYSTONE STATION | SHELOCTA, Armstrong, PA | Pass | State |
| 2024-08-09 | KEYSTONE CONEMAUGH PROJ LLC/KEYSTONE STATION | SHELOCTA, Armstrong, PA | Pass | State |
| 2024-08-09 | AMRIZE CEMENT INC/WHITEHALL PLT — high-priority violation on file | WHITEHALL, Lehigh, PA | Pass | State |
| 2024-08-09 | ROUNDTOP ENERGY/AUBURN | YARDLEY, Susquehanna, PA | Fail | State |
| 2024-08-08 | EBENSBURG POWER CO/EBENSBURG COGENERATION PLT | EBENSBURG, Cambria, PA | Pass | State |
| 2024-08-08 | HILCORP ENERGY CO/PULASKI WHITING CTL FAC — high-priority violation on file | EDINBURG, Lawrence, PA | Pass | State |
| 2024-08-08 | WOLF RUN ENERGY LLC/ELECTRIC GENERATION STATION | WYALUSING, Bradford, PA | Pass | State |
| 2024-08-08 | EXPAND OPERATING LLC/HOOKER SUS PAD | MESHOPPEN, Susquehanna, PA | Pass | State |
| 2024-08-08 | PAYNE, D. PAD 1 | NEW MILFORD, Susquehanna, PA | Pass | State |
| 2024-08-08 | POWERS, M. PAD 1 | MESHOPPEN, Susquehanna, PA | Pass | State |
| 2024-08-07 | EASTERN GAS TRANS & STORAGE INC/FINNEFROCK STA | RENOVO, Clinton, PA | Pass | State |
| 2024-08-07 | ERIE SEWER AUTHORITY/ERIE WWTP — high-priority violation on file | ERIE, Erie, PA | Pending | State |
| 2024-08-07 | WHEELABRATOR FALLS INC/FALLS TWP — high-priority violation on file | MORRISVILLE, Bucks, PA | Pass | State |
| 2024-08-07 | KEYSTONE CONEMAUGH PROJ LLC/CONEMAUGH STATION | NEW FLORENCE, Indiana, PA | Pass | State |
| 2024-08-07 | SQUIER, R. PAD 1 — high-priority violation on file | KINGSLEY, Susquehanna, PA | Pass | State |
| 2024-08-07 | LARUE, C PAD 2 — high-priority violation on file | MONTROSE, Susquehanna, PA | Pass | State |
| 2024-08-06 | EQUITRANS LP/TRUITTSBURG STA | FAIRMOUNT CITY, Clarion, PA | Fail | State |
| 2024-08-06 | TRANSCONTINENTAL GAS PIPELINE CO LLC/ COMP STA 607 | SWEET VALLEY, Luzerne, PA | Pass | State |
| 2024-08-06 | DERRY TWP MUNI AUTH/CLEARWATER RD | HERSHEY, Dauphin, PA | Pass | State |
| 2024-08-06 | LAUFFER, J. PAD 1 — high-priority violation on file | SPRINGVILLE, Susquehanna, PA | Pass | State |
| 2024-08-06 | USS/CLAIRTON WORKS — high-priority violation on file | CLAIRTON, Allegheny, PA | Fail | Local |
| 2024-08-05 | TRANSCONTINENTAL GAS/JACKSON TWP STA 517 | BENTON, Columbia, PA | Pass | State |
| 2024-08-05 | ALPACA ENERGY LLC/ELECTRIC GENERATING STA | CANTON, Bradford, PA | Fail | State |
| 2024-08-05 | CHESAPEAKE APPALACHIA LLC/AMCOR WELLPAD | MESHOPPEN, Wyoming, PA | Pass | State |
| 2024-08-05 | USS/CLAIRTON WORKS — high-priority violation on file | CLAIRTON, Allegheny, PA | Fail | Local |
| 2024-08-02 | PQ LLC/CHESTER | CHESTER, Delaware, PA | Pass | State |
| 2024-08-02 | ONEIDA VALLEY MIDSTRAM LLC/CONSTELLATION COMP STA | WEST SUNBURY, Butler, PA | Pass | State |
| 2024-08-01 | US GYPSUM CO/ALIQUIPPA | ALIQUIPPA, Beaver, PA | Pending | State |
| 2024-08-01 | MARKWEST LIBERTY BLUESTONE LLC/TRILLITH COMP STA | HARMONY, Butler, PA | Pass | State |
| 2024-07-31 | EASTERN GAS TRANS & STORAGE/RURAL VLY COMP STA | KITTANNING, Armstrong, PA | Fail | State |
| 2024-07-31 | NFG MIDSTREAM TROUT RUN LLC/HAGERMAN GAS & PROC METERING FAC | TROUT RUN, Lycoming, PA | Pass | State |
| 2024-07-31 | EQM GATHERING OPCO LLC/PETTIT COMP STA | HOLBROOK, Greene, PA | Pass | State |
| 2024-07-31 | PINE RUN MIDSTREAM LLC/BICKER COMP STA | CABOT, Butler, PA | Pass | State |
| 2024-07-30 | MAGNESITA REFRACTORIES/YORK — high-priority violation on file | YORK, York, PA | Pass | State |
| 2024-07-30 | ARDAGH GLASS INC/PORT ALLEGANY PLT — high-priority violation on file | PORT ALLEGANY, McKean, PA | Pass | State |
| 2024-07-30 | LOCKHEED MARTIN CORP/KING OF PRUSSIA | KING OF PRUSSIA, Montgomery, PA | Pass | State |
| 2024-07-30 | PENN MEDICINE DOYLESTOWN HOSPITAL — high-priority violation on file | DOYLESTOWN, Bucks, PA | Pass | State |
| 2024-07-30 | SNYDER BROS INC/HOGBACK COMP STA | NEW BETHLEHEM, Armstrong, PA | Pass | State |
| 2024-07-30 | MARKWEST LIBERTY BLUESTONE LLC/ROYAL OAK COMP STA | EVANS CITY, Butler, PA | Pass | State |
| 2024-07-30 | EQM GATHERING OPCO LLC/PETTIT COMP STA | HOLBROOK, Greene, PA | Pass | State |
| 2024-07-30 | EXPAND OPERATING LLC/ADAMS WYO PAD | LACEYVILLE, Wyoming, PA | Pass | State |
| 2024-07-29 | EAST PENN MFG CO INC/SMELTER PLT | LYONS, Berks, PA | Pass | State |
| 2024-07-26 | COTERRA ENERGY INC/MYERS R PAD 1 | HOP BOTTOM, Susquehanna, PA | Pass | State |
| 2024-07-26 | USS/CLAIRTON WORKS — high-priority violation on file | CLAIRTON, Allegheny, PA | Fail | Local |
| 2024-07-25 | WILLIAMS FIELD SVC CO LLC/SNAKE CREEK COMP STA | CLARKS SUMMIT, Susquehanna, PA | Pass | State |
| 2024-07-25 | EQM GATHERING OPCO LLC/SGL 179 DEHY | NEW FREEOIRT, Greene, PA | Pass | State |
| 2024-07-25 | KING, D. PAD 1 — high-priority violation on file | SPRINGVILLE, Susquehanna, PA | Pass | State |
| 2024-07-24 | PA DEPT OF CORR/LAUREL HIGHLANDS SCI | SOMERSET, Somerset, PA | Pass | State |
| 2024-07-24 | SEWARD GENERATING STATION/SEWARD | NEW FLORENCE, Indiana, PA | Pass | State |
| 2024-07-24 | ETC NORTHEAST PIPELINE LLC/BARTO COMP STA | HUGHESVILLE, Lycoming, PA | Pass | State |
| 2024-07-24 | WILLIAMS FIELD SVC CO LLC/NORTHEAST COMP STA | HALLSTEAD, Susquehanna, PA | Pass | State |
| 2024-07-24 | COTERRA ENERGY INC/MEAD B PAD 1 — high-priority violation on file | MONTROSE, Susquehanna, PA | Pass | State |
| 2024-07-24 | HAUSER, J. PAD 1 — high-priority violation on file | SPRINGVILLE, Susquehanna, PA | Pass | State |
| 2024-07-24 | USS/CLAIRTON WORKS — high-priority violation on file | CLAIRTON, Allegheny, PA | Fail | Local |
| 2024-07-23 | TEXAS EASTERN TRANS LP/BECHTELSVILLE | BECHTELSVILLE, Berks, PA | Pass | State |
| 2024-07-23 | WILLIAMS FIELD SVC CO LLC/KANE ROAD COMP STA | MONTROSE, Susquehanna, PA | Pass | State |
| 2024-07-23 | COLUMBIA GAS TRANS LLC/IOWA COMP STA | BROOKVILLE, Jefferson, PA | Pass | State |
| 2024-07-23 | WCAA MIDSTREAM LLC/WEITZ SOUTH 20 COMP STA | ADAMSBURG, Westmoreland, PA | Pass | State |
| 2024-07-23 | COTERRA ENERGY INC/CARPENETTI R PAD 1 | NICHOLSON, Susquehanna, PA | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.