EPA Air · stack tests by state and year
Air-emissions stack tests in West Virginia, 2026
- 114Stack 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 2026; 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, 2026
- Marshall County 26
- Harrison County 15
- Doddridge County 9
- Pleasants County 9
- Monongalia County 7
- Putnam County 5
- Wetzel County 5
- Grant County 5
- Berkeley County 5
- Marion County 4
- Brooke County 3
- Kanawha County 3
- Tyler County 3
- Pendleton County 3
West Virginia, other years
Air-emissions stack tests recorded in West Virginia, 2026
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2026-08-04 | EQT XL MIDSTREAM OPERATING LLC, CHANNING COMPRESSOR | PROCTOR, Marshall, WV | Pass | State |
| 2026-07-30 | ANTERO MIDSTREAM LLC, JARVISVILLE COMPRESSOR STATION | SALEM, Harrison, WV | Pass | State |
| 2026-07-09 | QUIKRETE CONSTRUCTION MATERIALS, LLC, QUIKRETE CEMENT — high-priority violation on file | MARTINSBURG, Berkeley, WV | Fail | State |
| 2026-07-09 | APPALACHIA MIDSTREAM SERVICES, L.L.C., MOUNTAINEER COMPRESSOR | WELLSBURG, Brooke, WV | Pass | State |
| 2026-07-09 | GOFF CONNECTOR LLC, CONNECTOR STATION | BRIDGEPORT, Harrison, WV | Pass | State |
| 2026-07-09 | CNX MIDSTREAM OPERATING COMPANY LLC, MAJORSVILLE STATION | ALMA, Marshall, WV | Pass | State |
| 2026-07-06 | KENTUCKY POWER COMPANY, MITCHELL PLANT | MOUNDSVILLE, Marshall, WV | Pass | State |
| 2026-06-30 | GOFF CONNECTOR LLC, CONNECTOR STATION | BRIDGEPORT, Harrison, WV | Pass | State |
| 2026-06-30 | APPALACHIAN POWER COMPANY, JOHN AMOS PLANT | WINFIELD, Putnam, WV | Pass | State |
| 2026-06-26 | MONONGAHELA POWER COMPANY, HARRISON STATION | HAYWOOD, Harrison, WV | Pass | State |
| 2026-06-25 | VIRGINIA ELECTRIC AND POWER COMPANY, MT. STORM | MT. STORM, Grant, WV | Pass | State |
| 2026-06-25 | VIRGINIA ELECTRIC AND POWER COMPANY, MT. STORM | MT. STORM, Grant, WV | Pass | State |
| 2026-06-25 | AMERICAN BITUMINOUS POWER PARTNERS, L. P., GRANT | GRANT TOWN, Marion, WV | Pass | State |
| 2026-06-19 | MONONGAHELA POWER COMPANY, HARRISON STATION | HAYWOOD, Harrison, WV | Pass | State |
| 2026-06-18 | APPALACHIA MIDSTREAM SERVICES, L.L.C., BLAKE RIDGE FACILITY | NEW MARTINSVILLE, Wetzel, WV | Pass | State |
| 2026-06-17 | MONONGAHELA POWER COMPANY, HARRISON STATION | HAYWOOD, Harrison, WV | Pass | State |
| 2026-06-17 | APPALACHIA MIDSTREAM SERVICES, L.L.C., SAND HILL STATION | DALLAS, Marshall, WV | Pass | State |
| 2026-06-11 | BIG SANDY PEAKER PLANT, LLC, NEAL | KENOVA, Wayne, WV | Pass | State |
| 2026-06-05 | WILLIAMS OHIO VALLEY MIDSTREAM LLC, OAK GROVE | MOUNDSVILLE, Marshall, WV | Pass | State |
| 2026-06-04 | APPALACHIAN POWER COMPANY, JOHN AMOS PLANT | WINFIELD, Putnam, WV | Pass | State |
| 2026-06-04 | THE CHEMOURS COMPANY FC, LLC, WASHINGTON WORKS — high-priority violation on file | WASHINGTON, Wood, WV | Pass | State |
| 2026-06-02 | EQM GATHERING OPCO, LLC, PANDORA STATION | WEST UNION, Doddridge, WV | Pass | State |
| 2026-06-02 | APPALACHIAN POWER COMPANY, JOHN AMOS PLANT | WINFIELD, Putnam, WV | Pass | State |
| 2026-05-29 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | PROCTOR, Marshall, WV | Pass | State |
| 2026-05-29 | ANTERO MIDSTREAM LLC, TORREYS PEAK COMP STATION | SISTERSVILLE, Tyler, WV | Pass | State |
| 2026-05-28 | MOUNTAIN GATHERING, LLC, MCCLELLAND STATION | WORTHINGTON, Marion, WV | Pass | State |
| 2026-05-28 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | PROCTOR, Marshall, WV | Pass | State |
| 2026-05-27 | QUIKRETE CONSTRUCTION MATERIALS, LLC, QUIKRETE CEMENT — high-priority violation on file | MARTINSBURG, Berkeley, WV | Pass | State |
| 2026-05-27 | COLUMBIA GAS TRANSMISSION, LLC, LONE OAK STATION | CAMERON, Marshall, WV | Pass | State |
| 2026-05-22 | QUAD/GRAPHICS, INC., HEDGESVILLE | MARTINSBURG, Berkeley, WV | Pass | State |
| 2026-05-20 | ANTERO MIDSTREAM LLC, BANNER COMPRESSOR STATION | NEW MILTON, Doddridge, WV | Pass | State |
| 2026-05-20 | DTM APPALACHIA GATHERING, LLC, MEPCO COMPRESSOR | MAIDSVILLE, Monongalia, WV | Pass | State |
| 2026-05-19 | OMNIS PLEASANTS, LLC, PLEASANTS POWER STATION | WILLOW ISLAND, Pleasants, WV | Pass | State |
| 2026-05-19 | OMNIS PLEASANTS, LLC, PLEASANTS POWER STATION | WILLOW ISLAND, Pleasants, WV | Pass | State |
| 2026-05-18 | ANTERO MIDSTREAM LLC, MIDDLEBOURNE IV | MIDDLEBOURNE, Tyler, WV | Pass | State |
| 2026-05-14 | AMERICAN BITUMINOUS POWER PARTNERS, L. P., GRANT | GRANT TOWN, Marion, WV | Pass | State |
| 2026-05-12 | EASTERN GAS TRANSMISSION AND STORAGE, INC., KENNEDY STATION | VALLEY CHAPEL, Lewis, WV | Pass | State |
| 2026-05-07 | VIRGINIA ELECTRIC AND POWER COMPANY, MT. STORM | MT. STORM, Grant, WV | Pass | State |
| 2026-04-29 | MONONGAHELA POWER COMPANY, FORT MARTIN STATION | MAIDSVILLE, Monongalia, WV | Pass | State |
| 2026-04-28 | MONONGAHELA POWER COMPANY, HARRISON STATION | HAYWOOD, Harrison, WV | Pass | State |
| 2026-04-28 | MONONGAHELA POWER COMPANY, HARRISON STATION | HAYWOOD, Harrison, WV | Pass | State |
| 2026-04-27 | BLUE RACER MIDSTREAM, LLC, FIELD STATION 1 | READER, Wetzel, WV | Pass | State |
| 2026-04-20 | COLUMBIA GAS TRANSMISSION, LLC, SHERWOOD STATION | SHERWOOD, Doddridge, WV | Pass | State |
| 2026-04-15 | QUIKRETE CONSTRUCTION MATERIALS, LLC, QUIKRETE CEMENT — high-priority violation on file | MARTINSBURG, Berkeley, WV | Pass | State |
| 2026-04-14 | KENTUCKY POWER COMPANY, MITCHELL PLANT | MOUNDSVILLE, Marshall, WV | Pass | State |
| 2026-04-14 | MORGANTOWN ENERGY ASSOCIATES, MORGANTOWN PLANT | MORGANTOWN, Monongalia, WV | Pass | State |
| 2026-04-14 | ANTERO MIDSTREAM LLC, LAFFERTY STATION | PENNSBORO, Ritchie, WV | Pass | State |
| 2026-04-10 | MONONGAHELA POWER COMPANY, HARRISON STATION | HAYWOOD, Harrison, WV | Pass | State |
| 2026-04-08 | EUREKA MIDSTREAM, LLC, CARBIDE SITE | HASTINGS, Wetzel, WV | Pass | State |
| 2026-04-07 | EASTERN GAS TRANSMISSION AND STORAGE, INC., SARDIS STATION | SARDIS, Harrison, WV | Pass | State |
| 2026-04-07 | MARKWEST LIBERTY MIDSTREAM & RESOURCES, L.L.C., MAJORSVILLE | DALLAS, Marshall, WV | Pass | State |
| 2026-04-06 | MARKWEST LIBERTY MIDSTREAM & RESOURCES, L.L.C., SHERWOOD | WEST UNION, Doddridge, WV | Pass | State |
| 2026-04-02 | EQM GATHERING OPCO, LLC, SATURN STATION | CENTRAL STATION, Doddridge, WV | Pass | State |
| 2026-04-02 | CNX MIDSTREAM OPERATING COMPANY LLC, DRY RIDGE STATION | CAMERON, Marshall, WV | Pass | State |
| 2026-04-01 | EASTERN GAS TRANSMISSION AND STORAGE, INC., L. L. TONKIN STATION | WEST UNION, Doddridge, WV | Pass | State |
| 2026-03-31 | MARKWEST LIBERTY MIDSTREAM & RESOURCES, L.L.C., MAJORSVILLE | DALLAS, Marshall, WV | Pass | State |
| 2026-03-26 | APPALACHIA MIDSTREAM SERVICES, L.L.C., RIDGELINE STATION | CAMERON, Marshall, WV | Pass | State |
| 2026-03-25 | APPALACHIAN POWER COMPANY, JOHN AMOS PLANT | WINFIELD, Putnam, WV | Pass | State |
| 2026-03-25 | APPALACHIAN POWER COMPANY, JOHN AMOS PLANT | WINFIELD, Putnam, WV | Pass | State |
| 2026-03-25 | COLUMBIA GAS TRANSMISSION, LLC, FILES CREEK | BEVERLY, Randolph, WV | Pass | State |
| 2026-03-24 | APPALACHIA MIDSTREAM SERVICES, L.L.C., RIDGELINE STATION | CAMERON, Marshall, WV | Pass | State |
| 2026-03-24 | COLUMBIA GAS TRANSMISSION, LLC, SENECA | SENECA ROCKS, Pendleton, WV | Pass | State |
| 2026-03-23 | COLUMBIA GAS TRANSMISSION, LLC, SENECA | SENECA ROCKS, Pendleton, WV | Pass | State |
| 2026-03-20 | COVESTRO LLC, NEW MARTINSVILLE | PROCTOR, Marshall, WV | Pass | State |
| 2026-03-19 | COLUMBIA GAS TRANSMISSION, LLC, GLENVILLE | TRUEBADA, Gilmer, WV | Pass | State |
| 2026-03-17 | MARKWEST LIBERTY MIDSTREAM & RESOURCES, L.L.C., SHERWOOD | WEST UNION, Doddridge, WV | Pass | State |
| 2026-03-16 | APPALACHIA MIDSTREAM SERVICES, L.L.C., BUFFALO STATION | BETHANY, Brooke, WV | Pass | State |
| 2026-03-15 | OMNIS PLEASANTS, LLC, PLEASANTS POWER STATION | WILLOW ISLAND, Pleasants, WV | Pass | State |
| 2026-03-15 | OMNIS PLEASANTS, LLC, PLEASANTS POWER STATION | WILLOW ISLAND, Pleasants, WV | Pass | State |
| 2026-03-13 | CHARLESTON AREA MEDICAL CENTER, INC., GENERAL HOSPITAL | CHARLESTON, Kanawha, WV | Pass | State |
| 2026-03-13 | OMNIS PLEASANTS, LLC, PLEASANTS POWER STATION | WILLOW ISLAND, Pleasants, WV | Pass | State |
| 2026-03-12 | MARKWEST LIBERTY MIDSTREAM & RESOURCES, L.L.C., MAJORSVILLE | DALLAS, Marshall, WV | Pass | State |
| 2026-03-11 | MONONGAHELA POWER COMPANY, HARRISON STATION | HAYWOOD, Harrison, WV | Pass | State |
| 2026-03-10 | MONONGAHELA POWER COMPANY, HARRISON STATION | HAYWOOD, Harrison, WV | Pass | State |
| 2026-03-10 | UNION CARBIDE CORPORATION, SOUTH CHARLESTON | SOUTH CHARLESTON, Kanawha, WV | Pass | State |
| 2026-03-09 | MARKWEST LIBERTY MIDSTREAM & RESOURCES, L.L.C., MOBLEY GAS PLANT | SMITHFIELD, Wetzel, WV | Pass | State |
| 2026-03-06 | OMNIS PLEASANTS, LLC, PLEASANTS POWER STATION | WILLOW ISLAND, Pleasants, WV | Pass | State |
| 2026-03-05 | AMERICAN BITUMINOUS POWER PARTNERS, L. P., GRANT | GRANT TOWN, Marion, WV | Pass | State |
| 2026-03-05 | WILLIAMS OHIO VALLEY MIDSTREAM LLC, FT. BEELER | CAMERON, Marshall, WV | Pass | State |
| 2026-03-05 | OMNIS PLEASANTS, LLC, PLEASANTS POWER STATION | WILLOW ISLAND, Pleasants, WV | Pass | State |
| 2026-03-04 | OMNIS PLEASANTS, LLC, PLEASANTS POWER STATION | WILLOW ISLAND, Pleasants, WV | Pass | State |
| 2026-03-03 | OMNIS PLEASANTS, LLC, PLEASANTS POWER STATION | WILLOW ISLAND, Pleasants, WV | Pass | State |
| 2026-02-27 | QUIKRETE CONSTRUCTION MATERIALS, LLC, QUIKRETE CEMENT — high-priority violation on file | MARTINSBURG, Berkeley, WV | Pass | State |
| 2026-02-26 | BLUE RACER MIDSTREAM, LLC, NATRIUM EXTRACTION & FRACTIONA | NATRIUM, Marshall, WV | Pass | State |
| 2026-02-26 | COLUMBIA GAS TRANSMISSION, LLC, CEREDO | HUNTINGTON, Wayne, WV | Pass | State |
| 2026-02-25 | ALTIVIA SERVICES, LLC, INSTITUTE PLANT | DUNBAR, Kanawha, WV | Pass | State |
| 2026-02-25 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | PROCTOR, Marshall, WV | Pass | State |
| 2026-02-25 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | PROCTOR, Marshall, WV | Pass | State |
| 2026-02-24 | COLUMBIA GAS TRANSMISSION, LLC, GLENVILLE | TRUEBADA, Gilmer, WV | Pass | State |
| 2026-02-24 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | PROCTOR, Marshall, WV | Pass | State |
| 2026-02-19 | KENTUCKY POWER COMPANY, MITCHELL PLANT | MOUNDSVILLE, Marshall, WV | Pass | State |
| 2026-02-19 | ANTERO MIDSTREAM LLC, MONROE STATION | ALMA, Tyler, WV | Pass | State |
| 2026-02-18 | KENTUCKY POWER COMPANY, MITCHELL PLANT | MOUNDSVILLE, Marshall, WV | Pass | State |
| 2026-02-18 | EASTERN GAS TRANSMISSION AND STORAGE, INC., MOCKINGBIRD HILL | PINE GROVE, Wetzel, WV | Pass | State |
| 2026-02-17 | MONONGAHELA POWER COMPANY, HARRISON STATION | HAYWOOD, Harrison, WV | Pass | State |
| 2026-02-17 | KENTUCKY POWER COMPANY, MITCHELL PLANT | MOUNDSVILLE, Marshall, WV | Pass | State |
| 2026-02-16 | MOUNTAIN STATE CLEAN ENERGY, LLC, MAIDSVILLE | MAIDSVILLE, Monongalia, WV | Pass | State |
| 2026-02-11 | APPALACHIA MIDSTREAM SERVICES, L.L.C., PLEASANTS | ADALINE, Marshall, WV | Pass | State |
| 2026-02-10 | MONONGAHELA POWER COMPANY, FORT MARTIN STATION | MAIDSVILLE, Monongalia, WV | Pass | State |
| 2026-02-08 | VIRGINIA ELECTRIC AND POWER COMPANY, MT. STORM | MT. STORM, Grant, 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.