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.