EPA Air · stack tests by state and year

Air-emissions stack tests in Pennsylvania, 2023

889Stack 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 2023; one facility can appear more than once, because this is a record of what happened rather than a list of places.

Counties in Pennsylvania, 2023

Pennsylvania, other years

Air-emissions stack tests recorded in Pennsylvania, 2023

Date	Facility	Where	Kind	Agency
2023-10-05	EXPAND OPERATING LLC/GU-VW MCMAHON WELL PAD	STEVENSVILLE, Bradford, PA	Pass	State
2023-10-05	EXPAND OPERATING LLC/GU-VW MCMAHON WELL PAD	STEVENSVILLE, Bradford, PA	Pass	State
2023-10-05	RIVERSIDE MATERIALS INC/ASPHALT PLT	PHILADELPHIA, Philadelphia, PA	Pass	Local
2023-10-04	ALLENTOWN TERM DE LLC/ALLENTOWN TERM	ALLENTOWN, Lehigh, PA	Pass	State
2023-10-04	TENNESSEE GAS PIPELINE CO LLC/COMP STA 321	CLIFFORD, Susquehanna, PA	Pass	State
2023-10-04	CONSOL PA COAL CO LLC/BAILEY PREP PLT — high-priority violation on file	WEST FINLEY, Greene, PA	Pass	State
2023-10-04	DIVERSIFIED PROD LLC/NV 34 WELLPAD — high-priority violation on file	PROSPERITY, Washington, PA	Pass	State
2023-10-04	CABOT OIL & GAS CORP/KROPA, T. PAD 1	SPRINGVILLE, Susquehanna, PA	Pass	State
2023-10-03	EASTERN GAS TRANS & STORAGE/CRAYNE STA	WAYNESBURG, Greene, PA	Pass	State
2023-10-03	CABOT OIL & GAS CORP/BISHOP, B PAD 1	SPRINGVILLE, Susquehanna, PA	Pass	State
2023-10-03	CABOT OIL & GAS CORP/MAKOSKY T PAD 1	KINGSLEY, Susquehanna, PA	Pass	State
2023-10-02	NFG MIDSTREAM COVINGTON LLC/KRAUSE COMP STA	MAINESBURG, Tioga, PA	Fail	State
2023-10-02	BKV OPR LLC/P & G WAREHOUSE PAD	MESHOPPEN, Wyoming, PA	Pass	State
2023-09-28	SPEER CARBON CO LLC/ST MARYS	SAINT MARYS, Elk, PA	Pass	State
2023-09-28	NATL FUEL SUPPLY CORP/BUFFALO COMP STA	WASHINGTON, Washington, PA	Pass	State
2023-09-28	APPALACHIA MIDSTREAM SVC LLC/STONEHOUSE COMP STA	RUSH, Susquehanna, PA	Pass	State
2023-09-27	ELLWOOD NATL FORGE/IRVINE	IRVINE, Warren, PA	Pass	State
2023-09-27	ENERGY DEVS HONEY BROOK LLC/CAERNARVON TWP	NARVON, Lancaster, PA	Pass	State
2023-09-27	DIVERSIFIED MIDSTREAM LLC/TIOGA COMP STA	WELLSBORO, Tioga, PA	Pass	State
2023-09-27	WILLIAMS FIELD SVC CO LLC/ZICK COMP STA	KINGSLEY, Susquehanna, PA	Pass	State
2023-09-27	VICTAULIC COMMERCE PARK FACILITY	EASTON, Northampton, PA	Pass	State
2023-09-26	TENNESSEE GAS PIPELINE CO/315 WELLSBORO	WELLSBORO, Tioga, PA	Pass	State
2023-09-26	EASTERN GAS TRANS & STORAGE INC/FINNEFROCK STA	RENOVO, Clinton, PA	Pass	State
2023-09-26	ELLWOOD QUALITY STEELS CO/NEW CASTLE PLT	NEW CASTLE, Lawrence, PA	Pass	State
2023-09-26	EQT ARO LLC/LARRYS CREEK COMP STA	JERSEY SHORE, Lycoming, PA	Pass	State
2023-09-26	JKLM ENERGY LLC/HEADWATERS 145 WELL PAD	ULYSSES, Potter, PA	Pass	State
2023-09-25	WILLIAMS FIELD SVC CO LLC/CENTRAL COMP STA	MONTROSE, Susquehanna, PA	Pass	State
2023-09-22	JOHNSON MATTHEY/WAYNE PLT	WAYNE, Chester, PA	Pass	State
2023-09-22	MARKWEST LIBERTY MIDSTREAM & RESOURCES/GODWIN COMP STA	WASHINGTON, Washington, PA	Pass	State
2023-09-22	APPALACHIA MIDSTREAM SVC LLC/CHERRY COMP STA	DUSHORE, Sullivan, PA	Pass	State
2023-09-22	NFG MIDSTREAM COVINGTON LLC/CLARK COMP STA	MAINESBURG, Tioga, PA	Pass	State
2023-09-22	EXPAND OPERATING LLC/NICKOLYN WELL PAD	AUBURN, Susquehanna, PA	Pass	State
2023-09-22	USS/CLAIRTON WORKS — high-priority violation on file	CLAIRTON, Allegheny, PA	Fail	Local
2023-09-22	SYNTHOMER JEFFERSON HILLS LLC	WEST ELIZABETH, Allegheny, PA	Pass	Local
2023-09-22	ALLEGHENY ENERGY SUPPLY/SPRINGDALE	PITTSBURGH, Allegheny, PA	Pass	Local
2023-09-21	COLUMBIA GAS TRANS LLC/ARTEMAS COMP STA	ARTEMAS, Bedford, PA	Fail	State
2023-09-21	WILLIAMS FIELD SVC CO LLC/LATHROP COMP STA	SPRINGVILLE, Susquehanna, PA	Pass	State
2023-09-21	REGENCY MARCELLUS GAS GATHERING LLC/MEHOOPANY STA	TUNKHANNOCK, Wyoming, PA	Pass	State
2023-09-21	ALLEGHENY ENERGY SUPPLY/SPRINGDALE	PITTSBURGH, Allegheny, PA	Pass	Local
2023-09-20	TENNESSEE GAS PIPELINE CO/319 WYALUSING	WYALUSING, Bradford, PA	Pass	State
2023-09-20	APPALACHIA MIDSTREAM SVC LLC/GRANVILLE STA 2	GRANVILLE SUMMIT, Bradford, PA	Pass	State
2023-09-20	MARKWEST LIBERTY MIDSTREAM/WELLING COMP STA	CLAYSVILLE, Washington, PA	Pass	State
2023-09-20	WILLIAMS FIELD SVC CO LLC/SHASKAS COMP STA	MONTROSE, Susquehanna, PA	Pass	State
2023-09-20	DIVERSIFIED PROD LLC/NINEVEH 58 WELL PAD — high-priority violation on file	PROSPERITY, Washington, PA	Pass	State
2023-09-20	DIVERSIFIED PROD LLC/NV 60 WELLPAD	CLAYSVILLE, Washington, PA	Pass	State
2023-09-20	SYNTHOMER JEFFERSON HILLS LLC	WEST ELIZABETH, Allegheny, PA	Pass	Local
2023-09-19	LATROBE SPECIALTY METALS/ A CARPENTER CO	LATROBE, Westmoreland, PA	Pass	State
2023-09-19	CONSOL PA COAL CO LLC/BAILEY PREP PLT — high-priority violation on file	WEST FINLEY, Greene, PA	Pass	State
2023-09-19	RAUSCH CREEK GENERATION LLC/FRAILEY TWP — high-priority violation on file	TREMONT, Schuylkill, PA	Pass	State
2023-09-19	SWARTHMORE COLLEGE/SWARTHMORE	SWARTHMORE, Delaware, PA	Pass	State
2023-09-19	VISTA METALS/KITTANNING PLT	KITTANNING, Armstrong, PA	Pass	State
2023-09-19	LAUREL MTN MIDSTREAM OPR LLC/SPRINGHILL COMP STA	LAKE LYNN, Fayette, PA	Pass	State
2023-09-18	EXPAND OPERATING LLC/INNES PAD	NEW MILFORD, Susquehanna, PA	Pass	State
2023-09-15	MARKWEST LIBERTY MID & RES / HOSKINS BOOSTER COMP STA	CLAYSVILLE, Washington, PA	Pass	State
2023-09-15	REGENCY MARCELLUS GAS GATHERING LLC/QUAKER STATE RD COMP STA	MONTOURSVILLE, Lycoming, PA	Pass	State
2023-09-15	USS/CLAIRTON WORKS — high-priority violation on file	CLAIRTON, Allegheny, PA	Pass	Local
2023-09-14	PRIME METALS ACQUISITION LLC/LUCERNE MINES	HOMER CITY, Indiana, PA	Pass	State
2023-09-14	CNX MIDSTREAM OPR CO LLC /MORRIS DEHY STATION	GRAYSVILLE, Greene, PA	Pass	State
2023-09-13	CLEVELAND CLIFFS PLATE/COATESVILLE	COATESVILLE, Chester, PA	Pass	State
2023-09-13	ARMSTRONG POWER/S BEND	SHELOCTA, Armstrong, PA	Pass	State
2023-09-13	MARKWEST LIBERTY MIDSTREAM & RESOURCES/LOWRY COMP STA	AVELLA, Washington, PA	Pass	State
2023-09-13	REV LNG SSL BC LLC/NICHE LNG LLC - TOWANDA FAC	WYALUSING, Bradford, PA	Pass	State
2023-09-13	SOUTHWESTERN ENERGY CO/KOZIOL 5H-6H	NEW MILFORD, Susquehanna, PA	Pass	State
2023-09-13	WILLIAMS FIELD SVC CO/MACNEW COMP STA	HOP BOTTOM, Susquehanna, PA	Pass	State
2023-09-12	ATI FLAT ROLLED PRODUCTS HOLDINGS LLC/VANDERGRIFT	VANDERGRIFT, Westmoreland, PA	Pass	State
2023-09-12	MARKWEST LIBERTY MIDSTREAM & RESOURCES/FULTON BOOSTER STA — high-priority violation on file	HICKORY, Washington, PA	Pass	State
2023-09-12	ETC NORTHEAST FLD SVC LLC/PIKE COMP STA	ROCHESTER, Beaver, PA	Pass	State
2023-09-12	COTERRA ENERGY INC/MEAD B PAD 1 — high-priority violation on file	MONTROSE, Susquehanna, PA	Fail	State
2023-09-12	EXPAND OPERATING LLC/RU-06 FLOHS PAD	NEW MILFORD, Susquehanna, PA	Pass	State
2023-09-12	LARUE, C PAD 2 — high-priority violation on file	MONTROSE, Susquehanna, PA	Pass	State
2023-09-11	SUSQUEHANNA GATHERING/NORTH RANGE CPF 1 COMP STA	SUSQUEHANNA, Susquehanna, PA	Fail	State
2023-09-10	SCHUYLKILL ENERGY RES/ST NICHOLAS COGEN — high-priority violation on file	SHENANDOAH, Schuylkill, PA	Pass	State
2023-09-08	COLUMBIA GAS TRANS CORP/DONEGAL COMP STA	WEST ALEXANDER, Washington, PA	Pass	State
2023-09-08	NFG MIDSTREAM COVINGTON LLC/DCNR TRACT 595	ARNOT, Tioga, PA	Pass	State
2023-09-08	CHESAPEAKE APPALACHIA LLC/GREGERSON SUS PAD	LACEYVILLE, Susquehanna, PA	Pass	State
2023-09-07	CLEVELAND CLIFFS MONESSEN COKE LLC/MONESSEN COKE PLT — high-priority violation on file	MONESSEN, Westmoreland, PA	Pass	State
2023-09-07	WILLIAMS FIELD SVC CO LLC/KANE ROAD COMP STA	MONTROSE, Susquehanna, PA	Pass	State
2023-09-07	REGENCY MARCELLUS GAS GATHERING LLC/BOBST MOUNTAIN COMP STA	COGAN STA, Lycoming, PA	Pass	State
2023-09-07	PA GEN ENERGY CO LLC/COP TRACT 293 COMP STA	WATERVILLE, Lycoming, PA	Pass	State
2023-09-07	GREYLOCK MIDSTREAM LLC/VERES COMP STA	WAYNESBURG, Greene, PA	Pass	State
2023-09-06	CLEVELAND CLIFFS MONESSEN COKE LLC/MONESSEN COKE PLT — high-priority violation on file	MONESSEN, Westmoreland, PA	Pass	State
2023-09-06	SPEER CARBON CO LLC/ST MARYS	SAINT MARYS, Elk, PA	Pass	State
2023-09-06	NFG MIDSTREAM COVINGTON LLC/EMPIRE BOOSTER CS	MANSFIELD, Tioga, PA	Pass	State
2023-09-06	REGENCY MARCELLUS GAS GATHERING LLC/ AUBURN STA	MESHOPPEN, Susquehanna, PA	Pass	State
2023-09-05	EQM GATHERING OPCO LLC/PISCES COMP STA	CLAYSVILLE, Washington, PA	Pass	State
2023-09-05	EXPAND OPERATING LLC/HOOKER SUS PAD	MESHOPPEN, Susquehanna, PA	Pass	State
2023-09-05	EXPAND OPERATING LLC/ADAMS WYO PAD	LACEYVILLE, Wyoming, PA	Pass	State
2023-08-31	TENNESSEE GAS PIPELINE CO/313 COUDERSPORT	COUDERSPORT, Potter, PA	Pass	State
2023-08-31	TENARIS/AMBRIDGE	AMBRIDGE, Beaver, PA	Pass	State
2023-08-31	CLEVELAND CLIFFS MONESSEN COKE LLC/MONESSEN COKE PLT — high-priority violation on file	MONESSEN, Westmoreland, PA	Pass	State
2023-08-31	GLENN O HAWBAKER/CRUSHING & ASPHALT PLT SR0064	BELLEFONTE, Centre, PA	Pass	State
2023-08-31	TENNESSEE GAS PIPELINE/COMP STA 303	JAMESTOWN, Venango, PA	Pass	State
2023-08-31	HERSHEY CO/WWTP	HERSHEY, Dauphin, PA	Pass	State
2023-08-31	EXPAND OPERATING LLC/SCOTT WELLPAD	NEW MILFORD, Susquehanna, PA	Fail	State
2023-08-31	LAUFFER, J. PAD 1 — high-priority violation on file	SPRINGVILLE, Susquehanna, PA	Fail	State
2023-08-30	MERCK SHARP & DOHME LLC/WEST PT	WEST POINT, Montgomery, PA	Pass	State
2023-08-30	HEIDELBERG MATERIALS US CEMENT LLC/EVANSVILLE CEMENT PLT & Q — high-priority violation on file	FLEETWOOD, Berks, PA	Pass	State
2023-08-30	DIVERSIFIED PROD MARCHAND COMP STA	INDIANA, Indiana, PA	Pass	State
2023-08-30	CHESAPEAKE APPALACHIA LLC/AMCOR WELLPAD	MESHOPPEN, Wyoming, PA	Pass	State
2023-08-29	ALTA PERFORMANCE MATERIALS US, LLC	PITTSBURGH, Allegheny, PA	Pass	Local

Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.