EPA Air · stack tests by county and year
Air-emissions stack tests in Washington County, Pennsylvania, 2023
- 65Stack 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 2023. 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, 2023
Air-emissions stack tests in Washington County, other years
Air-emissions stack tests recorded in Washington County, Pennsylvania, 2023
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2023-12-05 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/GODWIN COMP STA | Pass | State |
| 2023-11-10 | COLUMBIA GAS TRANS LLC/REDD FARM COMP STA | Pass | State |
| 2023-11-09 | CNX MIDSTREAM OPR CO LLC/MOR-44 COMP STA | Pass | State |
| 2023-10-31 | EQM GATHERING OPCO LLC/MCINTOSH COMP STA | Pass | State |
| 2023-10-18 | UGI GIBRALTAR GATHERING LLC/GIBRALTAR COMP STA | Pass | State |
| 2023-10-17 | MARKWEST LIBERTY MIDSTREAM RES/DOWN HOME COMPRESSOR STATION | Pass | State |
| 2023-10-11 | MARKWEST LIBERTY MIDSTREAM/SMITH COMP STA | Pass | State |
| 2023-10-06 | MARKWEST LIBERTY MID & RES / HOSKINS BOOSTER COMP STA | Pass | State |
| 2023-10-04 | DIVERSIFIED PROD LLC/NV 34 WELLPAD — high-priority violation on file | Pass | State |
| 2023-09-28 | NATL FUEL SUPPLY CORP/BUFFALO COMP STA | Pass | State |
| 2023-09-22 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/GODWIN COMP STA | Pass | State |
| 2023-09-20 | MARKWEST LIBERTY MIDSTREAM/WELLING COMP STA | Pass | State |
| 2023-09-20 | DIVERSIFIED PROD LLC/NINEVEH 58 WELL PAD — high-priority violation on file | Pass | State |
| 2023-09-20 | DIVERSIFIED PROD LLC/NV 60 WELLPAD | Pass | State |
| 2023-09-15 | MARKWEST LIBERTY MID & RES / HOSKINS BOOSTER COMP STA | Pass | State |
| 2023-09-13 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/LOWRY COMP STA | Pass | State |
| 2023-09-12 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/FULTON BOOSTER STA — high-priority violation on file | Pass | State |
| 2023-09-08 | COLUMBIA GAS TRANS CORP/DONEGAL COMP STA | Pass | State |
| 2023-09-05 | EQM GATHERING OPCO LLC/PISCES COMP STA | Pass | State |
| 2023-08-24 | EQM GATHERING OPCO LLC/STEELHEAD COMP STA | Pass | State |
| 2023-08-11 | EQM GATHERING OPCO LLC/STEELHEAD COMP STA | Pass | State |
| 2023-08-10 | CNX MIDSTREAM OPR CO LLC/NV-57 COMP STA | Pass | State |
| 2023-08-08 | MARKWEST LIBERTY MIDSTREAM/BRIGICH COMP STA | Pass | State |
| 2023-08-03 | MARKWEST LIBERTY MIDSTREAM/WELLING COMP STA | Pass | State |
| 2023-08-02 | GOLDEN EAGLE CONST CO/EIGHTY FOUR PLT | Fail | State |
| 2023-07-26 | ROVER PIPELINE LLC/BULGER COMP STA | Pass | State |
| 2023-07-20 | MARKWEST LIBERTY MIDSTREAM/ CARPENTER COMP STA | Pass | State |
| 2023-07-18 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/JOHNSTON COMP STA | Pass | State |
| 2023-06-14 | EQM GATHERING OPCO LLC/BLUE MOON COMP STA | Pass | State |
| 2023-06-05 | MARKWEST LIBERTY MIDSTREAM/ CARPENTER COMP STA | Pass | State |
| 2023-05-31 | COLUMBIA GAS TRANS LLC/REDD FARM COMP STA | Pass | State |
| 2023-05-31 | LOAN ASSET ISSUER LLC/WEST FINLEY 6 WELL PAD | Pass | State |
| 2023-05-31 | LOAN ASSET ISSUER LLC/WEST FINLEY 5 WELL PAD | Pass | State |
| 2023-05-30 | LOAN ASSET ISSUER LLC/WEST FINLEY 1 WELL PAD | Pass | State |
| 2023-05-30 | LOAN ASSET ISSUER LLC/WEST FINLEY 4 WELL PAD | Pass | State |
| 2023-05-25 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/REDD COMP STA | Pass | State |
| 2023-05-19 | MARKWEST LIBERTY MIDSTREAM/SMITH COMP STA | Pass | State |
| 2023-05-16 | EQM GATHERING OPCO LLC/MAKO COMP STA | Pass | State |
| 2023-05-10 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/SHAW COMP STA | Pass | State |
| 2023-05-04 | MARKWEST LIBERTY MIDSTREAM/ CARPENTER COMP STA | Pass | State |
| 2023-05-03 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/LOWRY COMP STA | Pass | State |
| 2023-04-26 | EQM GATHERING OPCO LLC/TWILIGHT COMP STA | Pass | State |
| 2023-04-26 | MARKWEST LIBERTY MIDST & RESOURCES/THREE BROTHERS COMP STA | Pass | State |
| 2023-04-18 | EQT PROD CO/MOJO COMPRESSOR UNIT | Pass | State |
| 2023-04-13 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/NANCY STEWART | Pass | State |
| 2023-04-12 | MARKWEST LIBERTY MIDSTREAM/BAKER COMP STA | Pass | State |
| 2023-04-11 | EQUITRANS LP/HARTSON | Pass | State |
| 2023-04-10 | MARKWEST LIBERTY MIDSTREAM/DRYER BOOSTER COMP STA | Pass | State |
| 2023-04-05 | COLUMBIA GAS TRANS CORP/DONEGAL COMP STA | Pass | State |
| 2023-04-05 | MARKWEST LIBERTY MIDSTREAM/BRIGICH COMP STA | Pass | State |
| 2023-04-05 | EQM GATHERING OPCO LLC/KRYPTONITE COMP STA | Pass | State |
| 2023-04-04 | MARKWEST LIBERTY MIDSTREAM/SMITH COMP STA | Pass | State |
| 2023-04-03 | MARKWEST LIBERTY MIDSTREAM/WELLING COMP STA | Pass | State |
| 2023-03-29 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/FULTON BOOSTER STA — high-priority violation on file | Pass | State |
| 2023-03-24 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/LOWRY COMP STA | Pass | State |
| 2023-02-28 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/SHAW COMP STA | Pass | State |
| 2023-02-28 | MARKWEST LIBERTY MIDSTREAM/WELLING COMP STA | Pass | State |
| 2023-02-27 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/NANCY STEWART | Pass | State |
| 2023-02-23 | MARKWEST LIBERTY M&R/TUPTA DAY COMP STA | Pass | State |
| 2023-02-22 | MARKWEST LIBERTY MIDST & RESOURCES/THREE BROTHERS COMP STA | Pass | State |
| 2023-02-10 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/SHAW COMP STA | Pass | State |
| 2023-02-01 | EQM GATHERING OPCO LLC/REDD DEHY STATION | Pass | State |
| 2023-01-12 | UNION ELEC STEEL CORP/HARMON CREEK | Pass | State |
| 2023-01-11 | NATL FUEL SUPPLY CORP/BUFFALO COMP STA | Pass | State |
| 2023-01-11 | EQM GATHERING OPCO LLC/BLUE MOON COMP STA | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.