EPA Air · stack tests by county and year

Air-emissions stack tests in Washington County, Pennsylvania, 2021

66Stack 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 Washington County, Pennsylvania during 2021. 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 Washington County facility page.

Washington County, Pennsylvania, 2021

Air-emissions stack tests in Washington County, other years

Air-emissions stack tests recorded in Washington County, Pennsylvania, 2021

Date	Facility	Kind	Agency
2021-12-20	MARKWEST LIBERTY MIDSTREAM/BAKER COMP STA	Pass	State
2021-12-06	UGI GIBRALTAR GATHERING LLC/GIBRALTAR COMP STA	Pass	State
2021-11-03	EQM GATHERING OPCO LLC/MCINTOSH COMP STA	Pass	State
2021-10-27	EQM GATHERING OPCO LLC/TWILIGHT COMP STA	Pass	State
2021-10-21	MARKWEST LIBERTY MIDSTREAM & RESOURCES/JOHNSTON COMP STA	Pass	State
2021-10-21	MARKWEST LIBERTY MIDSTREAM/WELLING COMP STA	Pass	State
2021-10-20	MARKWEST LIBERTY MIDSTREAM RES/DOWN HOME COMPRESSOR STATION	Pass	State
2021-10-18	MARKWEST LIBERTY MIDSTREAM/SMITH COMP STA	Pass	State
2021-10-18	LOAN ASSET ISSUER LLC/WEST FINLEY 10 WELL PAD	Pass	State
2021-10-07	CNX GAS CO LLC/NV-62 WELLPAD	Pass	State
2021-10-06	CNX MIDSTREAM OPR CO LLC/NV-57 COMP STA	Pass	State
2021-10-04	MARKWEST LIBERTY MIDSTREAM & RESOURCES/GODWIN COMP STA	Pass	State
2021-10-04	LOAN ASSET ISSUER LLC/WEST FINLEY 1 WELL PAD	Pass	State
2021-09-30	MARKWEST LIBERTY MID & RES / HOSKINS BOOSTER COMP STA	Pass	State
2021-09-28	MARKWEST LIBERTY MIDSTREAM/WELLING COMP STA	Pass	State
2021-09-27	MARKWEST LIBERTY MIDSTREAM & RESOURCES/FULTON BOOSTER STA — high-priority violation on file	Pass	State
2021-09-14	EQM GATHERING OPCO LLC/PISCES COMP STA	Pass	State
2021-09-07	NATL FUEL SUPPLY CORP/BUFFALO COMP STA	Pass	State
2021-09-03	MARKWEST LIBERTY MIDSTREAM/ CARPENTER COMP STA	Pass	State
2021-09-01	EQM GATHERING OPCO LLC/STEELHEAD COMP STA	Pass	State
2021-08-23	MARKWEST LIBERTY MIDSTREAM & RESOURCES/JOHNSTON COMP STA	Pass	State
2021-08-19	DIVERSIFIED PROD LLC/NINEVEH 58 WELL PAD — high-priority violation on file	Pass	State
2021-08-19	DIVERSIFIED PROD LLC/NV 60 WELLPAD	Pass	State
2021-08-18	DIVERSIFIED PROD LLC/NV 34 WELLPAD — high-priority violation on file	Pass	State
2021-08-13	CNX MIDSTREAM OPR CO LLC/NV-57 COMP STA	Pass	State
2021-08-11	MARKWEST LIBERTY M&R/TUPTA DAY COMP STA	Pass	State
2021-08-09	MARKWEST LIBERTY MIDSTREAM/BRIGICH COMP STA	Pass	State
2021-08-09	MARKWEST LIBERTY MIDSTREAM/WELLING COMP STA	Pass	State
2021-07-16	COLUMBIA GAS TRANS CORP/DONEGAL COMP STA	Pass	State
2021-06-16	EQM GATHERING OPCO LLC/BLUE MOON COMP STA	Pass	State
2021-05-19	EQM GATHERING OPCO LLC/TWILIGHT COMP STA	Pass	State
2021-05-18	EQM GATHERING OPCO LLC/MAKO COMP STA	Pass	State
2021-05-14	MARKWEST LIBERTY MIDSTREAM/BAKER COMP STA	Pass	State
2021-05-08	MARKWEST LIBERTY MIDSTREAM & RESOURCES/LOWRY COMP STA	Pass	State
2021-05-07	MARKWEST LIBERTY MIDSTREAM/ CARPENTER COMP STA	Pass	State
2021-05-06	UGI GIBRALTAR GATHERING LLC/GIBRALTAR COMP STA	Pass	State
2021-05-05	EQM GATHERING OPCO LLC/KRYPTONITE COMP STA	Pass	State
2021-05-03	MARKWEST LIBERTY MIDST & RESOURCES/THREE BROTHERS COMP STA	Pass	State
2021-04-28	MARKWEST LIBERTY MIDSTREAM & RESOURCES/REDD COMP STA	Pass	State
2021-04-27	MARKWEST LIBERTY MIDSTREAM & RESOURCES/SHAW COMP STA	Pass	State
2021-04-15	MARKWEST LIBERTY MIDSTREAM/DRYER BOOSTER COMP STA	Pass	State
2021-04-14	PERRYMAN CO/TITANIUM CONVERSION FAC — high-priority violation on file	Fail	State
2021-04-14	MARKWEST LIBERTY MIDSTREAM/BRIGICH COMP STA	Pass	State
2021-04-14	EQM GATHERING OPCO LLC/KRYPTONITE COMP STA	Pass	State
2021-04-13	MARKWEST LIBERTY MIDSTREAM & RESOURCES/NANCY STEWART	Pass	State
2021-04-09	MARKWEST LIBERTY MIDSTREAM/BAKER COMP STA	Pass	State
2021-04-07	ETC NORTHEAST PIPELINE/REVOLUTION CRYO PLT	Pass	State
2021-04-06	MARKWEST LIBERTY MIDSTREAM/SMITH COMP STA	Pass	State
2021-04-05	MARKWEST LIBERTY MIDSTREAM/WELLING COMP STA	Pass	State
2021-04-02	MARKWEST LIBERTY MIDSTREAM & RESOURCES/FULTON BOOSTER STA — high-priority violation on file	Pass	State
2021-03-30	EQT PROD CO/MOJO COMPRESSOR UNIT	Pass	State
2021-03-08	COLUMBIA GAS TRANS LLC/REDD FARM COMP STA	Pass	State
2021-03-03	MARKWEST LIBERTY MIDSTREAM & RESOURCES/NANCY STEWART	Pass	State
2021-03-02	MARKWEST LIBERTY MIDSTREAM/WELLING COMP STA	Pass	State
2021-03-01	MARKWEST LIBERTY M&R/TUPTA DAY COMP STA	Pass	State
2021-02-26	MARKWEST LIBERTY MIDSTREAM & RESOURCES/SHAW COMP STA	Pass	State
2021-02-26	MARKWEST LIBERTY MIDSTREAM & RESOURCES/LOWRY COMP STA	Pass	State
2021-02-25	MARKWEST LIBERTY MIDST & RESOURCES/THREE BROTHERS COMP STA	Pass	State
2021-02-25	LOAN ASSET ISSUER LLC/WEST FINLEY 6 WELL PAD	Pass	State
2021-02-25	LOAN ASSET ISSUER LLC/WEST FINLEY 5 WELL PAD	Pass	State
2021-02-08	EXPAND OPERATING LLC/BERNARD MCCULLEY WELLPAD	Pass	State
2021-02-04	NATL FUEL SUPPLY CORP/BUFFALO COMP STA	Pass	State
2021-02-04	EQT PROD CO/KUHN WELLPAD	Pass	State
2021-01-21	ARDEN LDFL/CHARTIERS TWP	Pass	State
2021-01-13	EQM GATHERING OPCO LLC/BLUE MOON COMP STA	Pass	State
2021-01-11	EQUITRANS LP/GINGER HILL SITE	Fail	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, stack tests in Washington county, PA, 2021. It lists 66 stack tests recorded in 2021.