EPA Air · stack tests by state, industry and year

Oil and gas extraction (NAICS 2111): stack tests in Pennsylvania, 2026

291Stack 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 2111. A facility filing more than one industry code is counted under the first one on its record.

Oil and gas extraction (NAICS 2111) in Pennsylvania, other years

Other industries in Pennsylvania, 2026

Air-emissions stack tests recorded in Pennsylvania, 2026

Date	Facility	Where	Kind	Agency
2026-03-02	INR MIDSTREAM LLC/WEST SUMMIT COMP STA	LAKE LYNN, Fayette, PA	Pass	State
2026-02-27	BOLLES SOUTH WELLPAD — high-priority violation on file	NEW MILFORD, Susquehanna, PA	Pass	State
2026-02-27	CNX MIDSTREAM OPR CO LLC/BELL POINT 2 M&R DEHYDRATION STA	APOLLO, Westmoreland, PA	Pass	State
2026-02-26	MARKWEST LIBERTY MIDSTREAM & RESOURCES/LOWRY COMP STA	AVELLA, Washington, PA	Pass	State
2026-02-26	REPSOL OIL & GAS LLC/COLE COMP STA	TROY, Bradford, PA	Pass	State
2026-02-26	JKLM ENERGY LLC/REESE HOLLOW 117 WELL PAD	COUDERSPORT, Potter, PA	Pass	State
2026-02-25	WCAA MIDSTREAM LLC/WEITZ SOUTH 20 COMP STA	ADAMSBURG, Westmoreland, PA	Pass	State
2026-02-25	WILLIAMS FIELD SVC CO/MACNEW COMP STA	HOP BOTTOM, Susquehanna, PA	Pass	State
2026-02-25	JKLM ENERGY LLC/SWEDEN VALLEY 101 PAD	COUDERSPORT, Potter, PA	Pass	State
2026-02-25	EQT ARO LLC/ELBOW PAD B COMP STA — high-priority violation on file	COGAN HOUSE, Lycoming, PA	Pass	State
2026-02-25	JKLM ENERGY/SWEDEN VALLEY 105 WELL PAD	COUDERSPORT, Potter, PA	Pass	State
2026-02-24	MARKWEST LIBERTY MIDSTREAM/WELLING COMP STA	CLAYSVILLE, Washington, PA	Pass	State
2026-02-24	EXPAND OPERATING LLC/ALVAREZ BRA WELL PAD	LACEYVILLE, Bradford, PA	Pass	State
2026-02-23	EQT ARO LLC/LYCOMING H&FC COMP STA — high-priority violation on file	TROUT RUN, Lycoming, PA	Pass	State
2026-02-20	REPSOL OIL AND GAS USA/TRACT 587 SFL COMP STA	CANTON, Tioga, PA	Pass	State
2026-02-20	APPALACHIA MIDSTREAM SVC LLC/STAGECOACH COMP STA	WYALUSING, Bradford, PA	Pass	State
2026-02-19	NFG MIDSTREAM COVINGTON LLC/TRACT 007 COMP STA	WELLSBORO, Tioga, PA	Pass	State
2026-02-19	EQT ARTEMIS MIDSTREAM LLC/ROGERS COMP STA — high-priority violation on file	NEW KENSINGTON, Westmoreland, PA	Pass	State
2026-02-19	VANDERMARK, R. PAD 1	MONTROSE, Susquehanna, PA	Pass	State
2026-02-18	APPALACHIA MIDSTREAM SVC LLC/WILMOT COMP STA	WYALUSING, Bradford, PA	Pass	State
2026-02-17	NFG MIDSTREAM COVINGTON LLC/COVINGTON COMP STA	COVINGTON, Tioga, PA	Pass	State
2026-02-16	DIVERSIFIED PROD CO LLC/STATE GAME LANDS COMP STA	MANONING TOWNSHIP, Armstrong, PA	Pass	State
2026-02-16	DIVERSIFIED PROD LLC/PINE CREEK COMP STA	PINE CREEK TOWNSHIP, Jefferson, PA	Pass	State
2026-02-13	EXPAND OPERATING LLC/LU-06 FLICKS RUN EAST WELL PAD	TROUT RUN, Lycoming, PA	Pass	State
2026-02-12	GREYLOCK MIDSTREAM LLC/VERES COMP STA	WAYNESBURG, Greene, PA	Pass	State
2026-02-12	BOLLES SOUTH WELLPAD — high-priority violation on file	NEW MILFORD, Susquehanna, PA	Pass	State
2026-02-11	EXPAND OPERATING LLC/TI-09-BROWN WELL PAD	LIBERTY, Lycoming, PA	Pass	State
2026-02-11	EXPAND OPERATING LLC/TI-07 CUPPER WELL PAD	LIBERTY, Tioga, PA	Pass	State
2026-02-10	K PETROLEUM INC/HACKETT COMP STA — high-priority violation on file	BENTLEYVILLE, Washington, PA	Pass	State
2026-02-10	REPSOL OIL & GAS USA LLC/THOMAS COMP STA	TROY, Bradford, PA	Pass	State
2026-02-10	MARKWEST LIBERTY MIDSTREAM & RESOURCES/MCMICHAEL COMP STA	CLINTON, Beaver, PA	Pass	State
2026-02-10	TRANSCONTINENTAL GAS PIPELINE CO LLC/ COMP STA 620	HEGINS TOWNSHIP, Schuylkill, PA	Pass	State
2026-02-09	DIVERSIFIED PROD LLC/BROOKVILLE SOUTH COMP STA	BROOKVILLE, Jefferson, PA	Pass	State
2026-02-09	RANGE RESOURCES APPALACHIA LLC/LAUREL HILL G	TROUT RUN, Lycoming, PA	Pass	State
2026-02-09	MARKWEST LIBERTY MIDSTREAM/TIMBERLAKE COMP STA	CLAYSVILLE, Washington, PA	Pass	State
2026-02-06	GREYLOCK PRODUCTION LLC/BEACON WELL PAD	WAYNESBURG, Greene, PA	Pass	State
2026-02-05	EQM GATHERING OPCO LLC/JUPITER COMP STA	WAYNESBURG, Greene, PA	Pass	State
2026-02-05	LAUREL MTN MIDSTREAM OPR LLC/SHAMROCK COMP STA — high-priority violation on file	SALEM, Fayette, PA	Pass	State
2026-02-05	EXPAND OPERATING LLC/GU-G SOUTH WELL PAD	WYALUSING, Bradford, PA	Pass	State
2026-02-05	RANGE RESOURCES APPALACHIA LLC/SGL 075A 12682	TROUT RUN, Lycoming, PA	Pass	State
2026-02-04	REPSOL OIL & GAS USA LLC/EDSELL COMP STA	LE RAYSVILLE, Bradford, PA	Pass	State
2026-02-03	EXPAND OPERATING LLC/MCGAVIN WELL PAD	MESHOPPEN, Susquehanna, PA	Pass	State
2026-02-03	WILLIAMS, D. PAD 1	KINGSLEY, Susquehanna, PA	Pass	State
2026-02-02	REGENCY MARCELLUS GAS GATHERING/CANOE RUN COMP STA	SALLADASBURG, Lycoming, PA	Pass	State
2026-02-02	DTM TIOGA GAS GATHERING LLC/TIOGA CENTRALIZED DEHY FAC	WESTFIELD, Tioga, PA	Pass	State
2026-01-29	PA GEN ENERGY CO LLC/HORTON RUN RD COMP STA	CONRAD, Potter, PA	Pass	State
2026-01-29	COTERRA ENERGY INC/CARPENETTI R PAD 1	NICHOLSON, Susquehanna, PA	Pass	State
2026-01-29	COTERRA ENERGY INC/MYERS R PAD 1	HOP BOTTOM, Susquehanna, PA	Pass	State
2026-01-28	REPSOL OIL& GAS USA LLC/REPINE COMP STA	LITTLE MEADOWS, Susquehanna, PA	Pass	State
2026-01-28	EXPAND OPERATING LLC/SIVERS BRA PAD	LACEYVILLE, Bradford, PA	Pass	State
2026-01-28	HOWELL, G. PAD 1	MESHOPPEN, Susquehanna, PA	Pass	State
2026-01-28	BUSIK, J. PAD 1	MONTROSE, Susquehanna, PA	Pass	State
2026-01-28	LIPPINCOTT, F. PAD 1 — high-priority violation on file	KINGSLEY, Susquehanna, PA	Pass	State
2026-01-28	P&G 3 WELL SITE	MESHOPPEN, Wyoming, PA	Pass	State
2026-01-27	REGENCY MARCELLUS GATHERING LLC/BRADFORD WEST COMP STA	GRANVILLE SUMMIT, Bradford, PA	Pass	State
2026-01-27	REGENCY MARCELLUS GAS GATHERING LLC/LONE WALNUT COMP STA	JERSEY SHORE, Lycoming, PA	Pass	State
2026-01-27	COTERRA ENERGY INC/BURKE G PAD 1	MESHOPPEN, Susquehanna, PA	Pass	State
2026-01-27	DOBROSIELSKI, S PAD 1	MESHOPPEN, Susquehanna, PA	Pass	State
2026-01-23	REPSOL OIL & GAS USA LLC/PUTNAM COMP STA	TROY, Bradford, PA	Pass	State
2026-01-23	ABBOTT, M. PAD 1	NEW MILFORD, Susquehanna, PA	Pass	State
2026-01-22	APPALACHIA MIDSTREAM SVC LLC/STAGECOACH COMP STA	WYALUSING, Bradford, PA	Pass	State
2026-01-22	GREYLOCK MIDSTREAM LLC/KUHL-SKIB COMP STA	JEFFERSON, Greene, PA	Pass	State
2026-01-22	COTERRA ENERGY INC/MEAD B PAD 1 — high-priority violation on file	MONTROSE, Susquehanna, PA	Pass	State
2026-01-22	RU-23 MITCHELL WELL PAD	NEW MILFORD, Susquehanna, PA	Pass	State
2026-01-20	WILLIAMS FIELD SVC CO LLC/CHURCH COMP STA	SPRINGVILLE, Susquehanna, PA	Pass	State
2026-01-20	NATL FUEL GAS SUPPLY CORP/MERCER COMP STA	MERCER, Mercer, PA	Pass	State
2026-01-20	REPSOL OIL & GAS USA LLC/DCNR 010 COMP STA	MORRIS RUN, Tioga, PA	Pass	State
2026-01-20	EXPAND OPERATING LLC/NR-23 FOUR BUCKS PAD	SUSQUEHANNA, Susquehanna, PA	Pass	State
2026-01-19	LIPPINCOTT, F. PAD 1 — high-priority violation on file	KINGSLEY, Susquehanna, PA	Pending	State
2026-01-16	SNYDER BROS INC/MUSHROOM MINE COMP STA	WORTHINGTON, Armstrong, PA	Pass	State
2026-01-15	EXCO APPALACHIA MIDSTREAM LLC/POVERTY HILL COMP STA	KITTANNING, Armstrong, PA	Pass	State
2026-01-14	APPALACHIA MIDSTREAM SVC LLC/AUBURN COMP STA	MESHOPPEN, Susquehanna, PA	Pass	State
2026-01-14	GREYLOCK PROD LLC/ANSONVILLE COMP STA	NEW MILLPORT, Clearfield, PA	Pass	State
2026-01-14	HEP PENNSYLVANIA GATHERING LLC/LAUREL HILL COMP STA	TROUT RUN, Lycoming, PA	Pass	State
2026-01-14	HEP PENNSYLVANIA GATHERING LLC/LAUREL HILL COMP STA	TROUT RUN, Lycoming, PA	Pass	State
2026-01-14	HEP PENNSYLVANIA GATHERING LLC/TIOGA CPF#2 COMP STA	LIBERTY, Tioga, PA	Pass	State
2026-01-13	APPALACHIA MIDSTREAM SVC LLC/RATTLESNAKE HILL COMP STA	AUBURN TOWNSHIP, Susquehanna, PA	Pass	State
2026-01-13	NFG MIDSTREAM COVINGTON LLC/BREON COMP STA	MANSFIELD, Tioga, PA	Pass	State
2026-01-13	REGENCY MARCELLUS GAS GATHERING LLC/MEHOOPANY STA	TUNKHANNOCK, Wyoming, PA	Pass	State
2026-01-12	NFG MIDSTREAM CLERMONT LLC/CLERMONT WEST COMP STA	EMPORIUM, Elk, PA	Pass	State
2026-01-09	GREYLOCK PROD LLC/WILDCAT WELL PAD	MT MORRIS, Greene, PA	Pass	State
2026-01-08	REGENCY MARCELLUS GAS GATHERING LLC/QUAKER STATE RD COMP STA	MONTOURSVILLE, Lycoming, PA	Pass	State
2026-01-08	WILLIAMS FIELD SVC CO LLC/GIBSON COMP STA	SOUTH GIBSON, Susquehanna, PA	Pass	State
2026-01-08	SWN ENERGY PROD CO/SEYMOUR PAD	LAWTON, Bradford, PA	Pass	State
2026-01-07	ETC NORTHEAST PIPELINE LLC/BARTO COMP STA	HUGHESVILLE, Lycoming, PA	Pass	State
2026-01-07	NFG MIDSTREAM COVINGTON LLC/MATZ COMP STA	CHATHAM, Tioga, PA	Pass	State
2026-01-07	WR-79 MITCHELL WELL PAD	MONTROSE, Susquehanna, PA	Pass	State
2026-01-06	NFG MIDSTREAM COVINGTON LLC/LAWTON COMP STA	WELLSBORO, Tioga, PA	Pass	State
2026-01-06	EQM GATHERING OPCO LLC/IO COMP STA	WAYNESBURG, Greene, PA	Pass	State
2026-01-06	WILLIAMS FIELD SVC CO LLC/WHITE COMP STA	SPRINGVILLE, Susquehanna, PA	Pass	State
2026-01-05	GREYLOCK MIDSTREAM LLC/CUMBERLAND HENDERSON COMP STA	CARMICHAELS, Greene, 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.