EPA Air · stack tests by county and year

Air-emissions stack tests in Lycoming County, Pennsylvania, 2025

51Stack tests

A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row below is one stack test recorded against a source in Lycoming County, Pennsylvania during 2025. A facility can appear several times: this is the year’s record of what happened, not a list of places. The sources themselves are on the Lycoming County facility page.

Lycoming County, Pennsylvania, 2025

Air-emissions stack tests in Lycoming County, other years

Air-emissions stack tests recorded in Lycoming County, Pennsylvania, 2025

Date	Facility	Kind	Agency
2025-12-09	PA GEN ENERGY CO LLC/TRACT 729 COMPRESSOR STATION	Pass	State
2025-11-25	ETC NORTHEAST PIPELINE LLC/BARTO COMP STA	Pass	State
2025-11-25	NFG MIDSTREAM TROUT RUN LLC/TROUT RUN MTN COMP STA	Pass	State
2025-11-24	ETC NORTHEAST PIPELINE LLC/RED BEND COMP STA	Pass	State
2025-11-10	REGENCY MARCELLUS GAS GATHERING LLC/OGONTZ EAST COMP STA	Pass	State
2025-11-07	ISA WELL SITE — high-priority violation on file	Pass	State
2025-11-03	RANGE RESOURCES APPALACHIA LLC/LAUREL HILL WELL PAD B	Pass	State
2025-10-23	REGENCY MARCELLUS GAS GATHERING/CANOE RUN COMP STA	Pass	State
2025-10-23	REGENCY MARCELLUS GAS GATHERING LLC/OGONTZ WEST COMP STA	Pass	State
2025-10-20	EQT ARO LLC/VARGO COMP STA — high-priority violation on file	Pass	State
2025-10-02	PA GEN ENERGY CO LLC/COP TRACT 293 COMP STA	Pass	State
2025-09-17	REGENCY MARCELLUS GAS GATHERING LLC/QUAKER STATE RD COMP STA	Pass	State
2025-08-28	REGENCY MARCELLUS GAS GATHERING LLC/BOBST MOUNTAIN COMP STA	Pass	State
2025-08-25	LAUREL HILL PAD A 12635	Pass	State
2025-08-13	ANDRITZ INC/MUNCY FOUNDRY	Pass	State
2025-08-13	BIMBO BAKERIES USA INC/WILLIAMSPORT PLT	Pass	State
2025-07-30	NFG MIDSTREAM TROUT RUN LLC/HAGERMAN GAS & PROC METERING FAC	Pass	State
2025-07-28	PREMIER WELL SITE — high-priority violation on file	Pass	State
2025-07-23	HEP PENNSYLVANIA GATHERING LLC/LAUREL HILL COMP STA	Pass	State
2025-07-22	NFG MIDSTREAM TROUT RUN LLC/TROUT RUN MTN COMP STA	Pass	State
2025-07-02	RANGE RESOURCES APPALACHIA/LAUREL HILL D 17531 PAD	Pass	State
2025-07-01	EQT ARO LLC/LYCOMING H&FC COMP STA — high-priority violation on file	Pass	State
2025-06-19	REGENCY MARCELLUS GAS GATHERING LLC/ROUPP COMP STA	Pass	State
2025-06-13	HAMILTON PATRIOT LLC/HAMILTON PATRIOT GENERATION PLANT — high-priority violation on file	Pass	State
2025-06-12	REGENCY MARCELLUS GAS GATHERING LLC/QUAKER STATE RD COMP STA	Pass	State
2025-06-11	UGI TEXAS CREEK LLC/CLEGG COMP STA	Pass	State
2025-06-11	HAMILTON PATRIOT LLC/HAMILTON PATRIOT GENERATION PLANT — high-priority violation on file	Pass	State
2025-06-11	NFG MIDSTREAM TROUT RUN LLC/TROUT RUN MTN COMP STA	Pass	State
2025-06-02	REGENCY MARCELLUS GAS GATHERING LLC/LONE WALNUT COMP STA	Pass	State
2025-05-30	NEXTERA RENEWABLE FUELS LLC/LYCO LANDFILL LFGTE PLT	Pass	State
2025-04-23	COMPASS NATURAL GAS/QUAKER CNG TRUCK TERMINAL	Pass	State
2025-04-16	ETC NORTHEAST PIPELINE LLC/BARTO COMP STA	Pass	State
2025-04-15	ETC NORTHEAST PIPELINE LLC/BARTO COMP STA	Pass	State
2025-03-18	NFG MIDSTREAM TROUT RUN LLC/BODINE COMP STA	Pass	State
2025-03-13	EQT ARO LLC/COP TRACT 685 COMP STA — high-priority violation on file	Pass	State
2025-03-12	REGENCY MARCELLUS GAS GATHERING LLC/QUAKER STATE RD COMP STA	Pass	State
2025-03-10	EQT ARO LLC/TRACT 289 COMP STA — high-priority violation on file	Pass	State
2025-03-10	EXPAND OPERATING LLC/LU-06 FLICKS RUN EAST WELL PAD	Pass	State
2025-03-06	EQT ARO LLC/VARGO COMP STA — high-priority violation on file	Pass	State
2025-03-04	EQT ARO LLC/LARRYS CREEK COMP STA	Pass	State
2025-03-04	EXPAND OPERATING LLC/TI-09-BROWN WELL PAD	Pass	State
2025-03-03	TRANSCONTINENTAL GAS/SALLADASBURG STATION 520	Pass	State
2025-03-03	EQT ARO LLC/ELBOW PAD B COMP STA — high-priority violation on file	Pass	State
2025-02-26	EQT ARO LLC/LYCOMING H&FC COMP STA — high-priority violation on file	Pass	State
2025-02-07	SUNOCO MIDSTREAM LLC/WILLIAMSPORT - SUNOCO LLC	Pass	State
2025-01-29	RANGE RESOURCES APPALACHIA LLC/SGL 075A 12682	Pass	State
2025-01-28	RANGE RESOURCES APPALACHIA LLC/LAUREL HILL G	Pass	State
2025-01-23	REGENCY MARCELLUS GAS GATHERING LLC/LONE WALNUT COMP STA	Pass	State
2025-01-23	ETC NORTHEAST PIPELINE LLC/RED BEND COMP STA	Pass	State
2025-01-09	REGENCY MARCELLUS GAS GATHERING LLC/OGONTZ WEST COMP STA	Pass	State
2025-01-09	COMPASS NATURAL GAS/QUAKER CNG TRUCK TERMINAL	Pending	State

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

What this page shows

This page covers Clean Air Act facilities in the EPA air register with stack tests in Lycoming county, PA, in 2025. The figures listed show 51 stack tests recorded in 2025.