EPA Air · stack tests by state and year
Air-emissions stack tests in West Virginia, 2025
- 224Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Every stack test below was recorded against a source in West Virginia during 2025; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in West Virginia, 2025
- Marshall County 38
- Monongalia County 23
- Harrison County 22
- Doddridge County 14
- Putnam County 13
- Wetzel County 11
- Tyler County 8
- Marion County 8
- Mason County 7
- Hardy County 6
- Kanawha County 6
- Berkeley County 6
- Brooke County 5
- Upshur County 5
- Grant County 5
- Wayne County 5
- Pendleton County 4
- Jackson County 4
- Braxton County 4
- Fayette County 3
- Lewis County 3
- Wood County 3
- Hancock County 3
West Virginia, other years
Air-emissions stack tests recorded in West Virginia, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-12-29 | WILLIAMS OHIO VALLEY MIDSTREAM LLC, FT. BEELER | CAMERON, Marshall, WV | Pass | State |
| 2025-12-16 | APPALACHIAN POWER COMPANY, JOHN AMOS PLANT | WINFIELD, Putnam, WV | Pass | State |
| 2025-12-11 | EQT XL MIDSTREAM OPERATING LLC, LEGACY CONDENSATE PAD | PROCTOR, Marshall, WV | Pass | State |
| 2025-12-10 | WVA MANUFACTURING, LLC, ALLOY — high-priority violation on file | ALLOY, Fayette, WV | Pass | State |
| 2025-12-10 | MONONGAHELA POWER COMPANY, HARRISON STATION | HAYWOOD, Harrison, WV | Pass | State |
| 2025-12-10 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | PROCTOR, Marshall, WV | Pass | State |
| 2025-12-10 | ANTERO MIDSTREAM LLC, LINCOLN COMPRESSOR STN | READER, Wetzel, WV | Pass | State |
| 2025-12-09 | MONONGAHELA POWER COMPANY, HARRISON STATION | HAYWOOD, Harrison, WV | Pass | State |
| 2025-12-05 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | PROCTOR, Marshall, WV | Pass | State |
| 2025-12-05 | MONONGAHELA POWER COMPANY, FORT MARTIN STATION | MAIDSVILLE, Monongalia, WV | Pass | State |
| 2025-12-04 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | PROCTOR, Marshall, WV | Pass | State |
| 2025-11-20 | ERGON - WEST VIRGINIA, INC., NEWELL | NEWELL, Hancock, WV | Pass | State |
| 2025-11-20 | DTM APPALACHIA GATHERING, LLC, DAYBROOK STATION | FAIRVIEW, Marion, WV | Pass | State |
| 2025-11-20 | MONONGAHELA POWER COMPANY, FORT MARTIN STATION | MAIDSVILLE, Monongalia, WV | Pass | State |
| 2025-11-19 | KENTUCKY POWER COMPANY, MITCHELL PLANT | MOUNDSVILLE, Marshall, WV | Pass | State |
| 2025-11-19 | ANTERO MIDSTREAM LLC, MOUNTAIN STATION | PENNSBORO, Tyler, WV | Pass | State |
| 2025-11-18 | MONONGAHELA POWER COMPANY, HARRISON STATION | HAYWOOD, Harrison, WV | Pass | State |
| 2025-11-12 | SAINT-GOBAIN CERAMICS & PLASTICS, INC., BUCKHANNO — high-priority violation on file | BUCKHANNON, Upshur, WV | Fail | State |
| 2025-11-12 | ANTERO MIDSTREAM LLC, GRAYS PEAK CS | READER, Wetzel, WV | Pass | State |
| 2025-11-06 | MONONGAHELA POWER COMPANY, HARRISON STATION | HAYWOOD, Harrison, WV | Pass | State |
| 2025-11-06 | DTM APPALACHIA GATHERING, LLC, MEPCO COMPRESSOR | MAIDSVILLE, Monongalia, WV | Pass | State |
| 2025-11-06 | EASTERN GAS TRANSMISSION AND STORAGE, INC., MOCKINGBIRD HILL | PINE GROVE, Wetzel, WV | Pass | State |
| 2025-11-05 | COLUMBIA GAS TRANSMISSION, LLC, LOST RIVER | MATHIAS, Hardy, WV | Pass | State |
| 2025-11-05 | KINGSFORD MANUFACTURING COMPANY, PARSONS | PARSONS, Tucker, WV | Pass | State |
| 2025-11-04 | COLUMBIA GAS TRANSMISSION, LLC, FRAMETOWN | FRAMETOWN, Braxton, WV | Pass | State |
| 2025-11-04 | MONONGAHELA POWER COMPANY, HARRISON STATION | HAYWOOD, Harrison, WV | Pass | State |
| 2025-10-29 | MOUNTAIN STATE CLEAN ENERGY, LLC, MAIDSVILLE | MAIDSVILLE, Monongalia, WV | Pass | State |
| 2025-10-29 | MOUNTAIN STATE CLEAN ENERGY, LLC, MAIDSVILLE | MAIDSVILLE, Monongalia, WV | Pass | State |
| 2025-10-29 | GREER LIME COMPANY, RIVERTON | RIVERTON, Pendleton, WV | Pass | State |
| 2025-10-28 | ERGON - WEST VIRGINIA, INC., NEWELL | NEWELL, Hancock, WV | Pass | State |
| 2025-10-24 | CONSTELLIUM ROLLED PRODUCTS RAVENSWOOD, LLC, RAVENSWOOD | RAVENSWOOD, Jackson, WV | Pass | State |
| 2025-10-23 | COLUMBIA WEST VIRGINIA CORPORATION, CRAIGSVILLE | CRAIGSVILLE, Nicholas, WV | Pass | State |
| 2025-10-22 | ANTERO MIDSTREAM LLC, WEST MOUNTAIN STATION | PENNSBORO, Ritchie, WV | Pass | State |
| 2025-10-21 | DELRIN USA, LLC, DELRIN USA - WASHINGTON WORKS | WASHINGTON, Wood, WV | Pass | State |
| 2025-10-16 | THE PROCTER AND GAMBLE MANUFACTURING COMPANY, TABLER STATION | INWOOD, Berkeley, WV | Pass | State |
| 2025-10-16 | COLUMBIA GAS TRANSMISSION, LLC, LOST RIVER | MATHIAS, Hardy, WV | Pass | State |
| 2025-10-16 | COLUMBIA GAS TRANSMISSION, LLC, HUBBALL | BRANCHLAND, Lincoln, WV | Pass | State |
| 2025-10-14 | WVA MANUFACTURING, LLC, ALLOY — high-priority violation on file | ALLOY, Fayette, WV | Fail | State |
| 2025-10-09 | APPALACHIAN POWER CO. - MOUNTAINEER PLANT, NEW HAVEN | NEW HAVEN, Mason, WV | Pass | State |
| 2025-10-08 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | PROCTOR, Marshall, WV | Pass | State |
| 2025-10-07 | APPALACHIAN POWER CO. - MOUNTAINEER PLANT, NEW HAVEN | NEW HAVEN, Mason, WV | Pass | State |
| 2025-10-01 | ANTERO MIDSTREAM LLC, CASTLE PEAK STN | NEW MARTINSVILLE, Tyler, WV | Pass | State |
| 2025-09-30 | AMERICAN WOODMARK CORPORATION, SOUTH BRANCH | MOOREFIELD, Hardy, WV | Pass | State |
| 2025-09-30 | MONONGAHELA POWER COMPANY, FORT MARTIN STATION | MAIDSVILLE, Monongalia, WV | Pass | State |
| 2025-09-25 | ERGON - WEST VIRGINIA, INC., NEWELL | NEWELL, Hancock, WV | Pass | State |
| 2025-09-25 | WEYERHAEUSER COMPANY, BUCKHANNON | BUCKHANNON, Upshur, WV | Pass | State |
| 2025-09-24 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | PROCTOR, Marshall, WV | Pass | State |
| 2025-09-24 | WILLIAMS OHIO VALLEY MIDSTREAM LLC, OAK GROVE | MOUNDSVILLE, Marshall, WV | Pass | State |
| 2025-09-24 | APPALACHIA MIDSTREAM SERVICES, L.L.C., PIONEER FACILITY | WHEELING, Ohio, WV | Pass | State |
| 2025-09-24 | WEYERHAEUSER COMPANY, BUCKHANNON | BUCKHANNON, Upshur, WV | Pass | State |
| 2025-09-23 | APPALACHIA MIDSTREAM SERVICES, L.L.C., THREEDUBS STATION | WELLSBURG, Brooke, WV | Pass | State |
| 2025-09-23 | EASTERN GAS TRANSMISSION AND STORAGE, INC., CORNWELL STATION | CLENDENIN, Kanawha, WV | Pass | State |
| 2025-09-23 | COLUMBIA GAS TRANSMISSION, LLC, SENECA | SENECA ROCKS, Pendleton, WV | Pass | State |
| 2025-09-23 | AOC MATERIALS, LLC, NEAL PLANT | KENOVA, Wayne, WV | Pass | State |
| 2025-09-19 | EASTERN GAS TRANSMISSION AND STORAGE, INC., SCHUTTE STATION | SEDALIA, Doddridge, WV | Pass | State |
| 2025-09-18 | FELMAN PRODUCTION, LLC, LETART | LETART, Mason, WV | Pass | State |
| 2025-09-18 | ANTERO MIDSTREAM LLC, MIDDLEBOURNE V | MIDDLEBOURNE, Tyler, WV | Pass | State |
| 2025-09-17 | ARMSTRONG WORLD INDUSTRIES, INC., MILLWOOD | MILLWOOD, Jackson, WV | Pass | State |
| 2025-09-12 | APPALACHIA MIDSTREAM SERVICES, L.L.C., PLEASANTS | ADALINE, Marshall, WV | Pass | State |
| 2025-09-12 | CNX MIDSTREAM OPERATING COMPANY LLC, SHIRLEY STATION | ALMA, Tyler, WV | Pass | State |
| 2025-09-11 | EUREKA MIDSTREAM, LLC, CARBIDE SITE | HASTINGS, Wetzel, WV | Pass | State |
| 2025-09-05 | AMERICAN BITUMINOUS POWER PARTNERS, L. P., GRANT | GRANT TOWN, Marion, WV | Pass | State |
| 2025-09-03 | MONONGAHELA POWER COMPANY, FORT MARTIN STATION | MAIDSVILLE, Monongalia, WV | Pass | State |
| 2025-09-03 | APPALACHIAN POWER COMPANY, JOHN AMOS PLANT | WINFIELD, Putnam, WV | Pass | State |
| 2025-09-03 | APPALACHIAN POWER COMPANY, JOHN AMOS PLANT | WINFIELD, Putnam, WV | Pass | State |
| 2025-08-29 | ANTERO MIDSTREAM LLC, MIDDLEBOURNE III | WICK, Tyler, WV | Pass | State |
| 2025-08-26 | MOUNTAIN VALLEY PIPELINE, LLC, STALLWORTH STATION | MEADOW BRIDGE, Fayette, WV | Pass | State |
| 2025-08-26 | KENTUCKY POWER COMPANY, MITCHELL PLANT | MOUNDSVILLE, Marshall, WV | Pass | State |
| 2025-08-22 | QUIKRETE CONSTRUCTION MATERIALS, LLC, QUIKRETE CEMENT — high-priority violation on file | MARTINSBURG, Berkeley, WV | Pass | State |
| 2025-08-22 | QUIKRETE CONSTRUCTION MATERIALS, LLC, QUIKRETE CEMENT — high-priority violation on file | MARTINSBURG, Berkeley, WV | Pass | State |
| 2025-08-21 | CRANBERRY PIPELINE CORPORATION, LESTER/BUCK STATI | LESTER, Raleigh, WV | Pass | State |
| 2025-08-19 | EASTERN GAS TRANSMISSION AND STORAGE, INC., LIGHTBURN STATION | JANE LEW, Lewis, WV | Pass | State |
| 2025-08-19 | EQT XL MIDSTREAM OPERATING LLC, CHANNING COMPRESSOR | PROCTOR, Marshall, WV | Pass | State |
| 2025-08-19 | PLEASANTS ENERGY, LLC, WAVERLY | WILLOW ISLAND, Pleasants, WV | Pass | State |
| 2025-08-14 | KENTUCKY POWER COMPANY, MITCHELL PLANT | MOUNDSVILLE, Marshall, WV | Pass | State |
| 2025-08-13 | MOUNTAIN GATHERING, LLC, MCCLELLAND STATION | WORTHINGTON, Marion, WV | Pass | State |
| 2025-08-13 | APG POLYTECH, LLC, APPLE GROVE PLANT | APPLE GROVE, Mason, WV | Pass | State |
| 2025-08-13 | MPLX TERMINALS LLC, KENOVA | KENOVA, Wayne, WV | Pass | State |
| 2025-08-12 | APPALACHIAN POWER COMPANY, JOHN AMOS PLANT | WINFIELD, Putnam, WV | Pass | State |
| 2025-08-08 | MONONGAHELA POWER COMPANY, FORT MARTIN STATION | MAIDSVILLE, Monongalia, WV | Pass | State |
| 2025-08-08 | APPALACHIAN POWER COMPANY, JOHN AMOS PLANT | WINFIELD, Putnam, WV | Pass | State |
| 2025-08-07 | EQM GATHERING OPCO, LLC, JANUS STATION | WEST UNION, Doddridge, WV | Pass | State |
| 2025-08-07 | MONONGAHELA POWER COMPANY, HARRISON STATION | HAYWOOD, Harrison, WV | Pass | State |
| 2025-08-07 | CERTAINTEED GYPSUM WEST VIRGINIA, INC., MOUNDSVILLE | PROCTOR, Marshall, WV | Pass | State |
| 2025-08-07 | APPALACHIAN POWER COMPANY, JOHN AMOS PLANT | WINFIELD, Putnam, WV | Pass | State |
| 2025-08-06 | MONONGAHELA POWER COMPANY, HARRISON STATION | HAYWOOD, Harrison, WV | Pass | State |
| 2025-08-06 | MONONGAHELA POWER COMPANY, HARRISON STATION | HAYWOOD, Harrison, WV | Pass | State |
| 2025-08-05 | MARKWEST LIBERTY MIDSTREAM & RESOURCES, L.L.C., SHERWOOD | WEST UNION, Doddridge, WV | Pass | State |
| 2025-08-05 | MONONGAHELA POWER COMPANY, HARRISON STATION | HAYWOOD, Harrison, WV | Pass | State |
| 2025-08-01 | APPALACHIA MIDSTREAM SERVICES, LLC, BATTLE RUN | VALLEY GROVE, Ohio, WV | Pass | State |
| 2025-07-31 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | PROCTOR, Marshall, WV | Pass | State |
| 2025-07-31 | MARKWEST LIBERTY MIDSTREAM & RESOURCES, L.L.C., MAJORSVILLE | DALLAS, Marshall, WV | Pass | State |
| 2025-07-30 | VIRGINIA ELECTRIC AND POWER COMPANY, MT. STORM | MT. STORM, Grant, WV | Pass | State |
| 2025-07-30 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | PROCTOR, Marshall, WV | Pass | State |
| 2025-07-30 | APPALACHIAN POWER COMPANY, JOHN AMOS PLANT | WINFIELD, Putnam, WV | Pass | State |
| 2025-07-30 | COLUMBIA GAS TRANSMISSION, LLC, SMITHFIELD | SMITHFIELD, Wetzel, WV | Pass | State |
| 2025-07-29 | COLUMBIA GAS TRANSMISSION, LLC, CLEVELAND | KANAWHA HEAD, Upshur, WV | Pass | State |
| 2025-07-25 | MONONGAHELA POWER COMPANY, FORT MARTIN STATION | MAIDSVILLE, Monongalia, WV | Pass | State |
| 2025-07-24 | AMERICAN BITUMINOUS POWER PARTNERS, L. P., GRANT | GRANT TOWN, Marion, WV | Pass | State |
| 2025-07-24 | KENTUCKY POWER COMPANY, MITCHELL PLANT | MOUNDSVILLE, Marshall, WV | Pass | State |
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Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.