EPA Air · stack tests by county and year
Air-emissions stack tests in Marshall County, West Virginia, 2025
- 38Stack 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 Marshall County, West Virginia 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 Marshall County facility page.
Marshall County, West Virginia, 2025
Air-emissions stack tests in Marshall County, other years
Air-emissions stack tests recorded in Marshall County, West Virginia, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-12-29 | WILLIAMS OHIO VALLEY MIDSTREAM LLC, FT. BEELER | Pass | State |
| 2025-12-11 | EQT XL MIDSTREAM OPERATING LLC, LEGACY CONDENSATE PAD | Pass | State |
| 2025-12-10 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | Pass | State |
| 2025-12-05 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | Pass | State |
| 2025-12-04 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | Pass | State |
| 2025-11-19 | KENTUCKY POWER COMPANY, MITCHELL PLANT | Pass | State |
| 2025-10-08 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | Pass | State |
| 2025-09-24 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | Pass | State |
| 2025-09-24 | WILLIAMS OHIO VALLEY MIDSTREAM LLC, OAK GROVE | Pass | State |
| 2025-09-12 | APPALACHIA MIDSTREAM SERVICES, L.L.C., PLEASANTS | Pass | State |
| 2025-08-26 | KENTUCKY POWER COMPANY, MITCHELL PLANT | Pass | State |
| 2025-08-19 | EQT XL MIDSTREAM OPERATING LLC, CHANNING COMPRESSOR | Pass | State |
| 2025-08-14 | KENTUCKY POWER COMPANY, MITCHELL PLANT | Pass | State |
| 2025-08-07 | CERTAINTEED GYPSUM WEST VIRGINIA, INC., MOUNDSVILLE | Pass | State |
| 2025-07-31 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | Pass | State |
| 2025-07-31 | MARKWEST LIBERTY MIDSTREAM & RESOURCES, L.L.C., MAJORSVILLE | Pass | State |
| 2025-07-30 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | Pass | State |
| 2025-07-24 | KENTUCKY POWER COMPANY, MITCHELL PLANT | Pass | State |
| 2025-07-17 | APPALACHIA MIDSTREAM SERVICES, L.L.C., SAND HILL STATION | Pass | State |
| 2025-07-15 | COLUMBIA GAS TRANSMISSION, LLC, ADALINE COMP. STATION | Pass | State |
| 2025-07-08 | KENTUCKY POWER COMPANY, MITCHELL PLANT | Pass | State |
| 2025-05-05 | MARKWEST LIBERTY MIDSTREAM & RESOURCES, L.L.C., MAJORSVILLE | Pass | State |
| 2025-04-17 | APPALACHIA MIDSTREAM SERVICES, L.L.C., PLEASANTS | Pass | State |
| 2025-04-08 | MARKWEST LIBERTY MIDSTREAM & RESOURCES, L.L.C., MAJORSVILLE | Pass | State |
| 2025-04-08 | CNX MIDSTREAM OPERATING COMPANY LLC, DRY RIDGE STATION | Pass | State |
| 2025-04-02 | KENTUCKY POWER COMPANY, MITCHELL PLANT | Pass | State |
| 2025-03-27 | APPALACHIA MIDSTREAM SERVICES, L.L.C., RIDGELINE STATION | Pass | State |
| 2025-03-26 | APPALACHIA MIDSTREAM SERVICES, L.L.C., RIDGELINE STATION | Pass | State |
| 2025-03-20 | COVESTRO LLC, NEW MARTINSVILLE | Pass | State |
| 2025-03-18 | WILLIAMS OHIO VALLEY MIDSTREAM LLC, FT. BEELER | Pass | State |
| 2025-03-13 | MARKWEST LIBERTY MIDSTREAM & RESOURCES, L.L.C., MAJORSVILLE | Pass | State |
| 2025-02-20 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | Pass | State |
| 2025-02-19 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | Pass | State |
| 2025-02-19 | KENTUCKY POWER COMPANY, MITCHELL PLANT | Pass | State |
| 2025-02-13 | EQT XL MIDSTREAM OPERATING LLC, PAYNE STATION | Pass | State |
| 2025-02-05 | APPALACHIA MIDSTREAM SERVICES, L.L.C., MILLER STATION | Pass | State |
| 2025-02-05 | APPALACHIA MIDSTREAM SERVICES, L.L.C., MILLER STATION | Pass | State |
| 2025-01-13 | BLUE RACER MIDSTREAM, LLC, NATRIUM EXTRACTION & FRACTIONA | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.