EPA Air · stack tests by county and year
Air-emissions stack tests in Mason County, West Virginia, 2025
- 7Stack 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 Mason 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 Mason County facility page.
Air-emissions stack tests in Mason County, other years
Air-emissions stack tests recorded in Mason County, West Virginia, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-10-09 | APPALACHIAN POWER CO. - MOUNTAINEER PLANT, NEW HAVEN | Pass | State |
| 2025-10-07 | APPALACHIAN POWER CO. - MOUNTAINEER PLANT, NEW HAVEN | Pass | State |
| 2025-09-18 | FELMAN PRODUCTION, LLC, LETART | Pass | State |
| 2025-08-13 | APG POLYTECH, LLC, APPLE GROVE PLANT | Pass | State |
| 2025-01-28 | APPALACHIAN POWER CO. - MOUNTAINEER PLANT, NEW HAVEN | Pass | State |
| 2025-01-13 | APPALACHIAN POWER CO. - MOUNTAINEER PLANT, NEW HAVEN | Pass | State |
| 2025-01-07 | APPALACHIAN POWER CO. - MOUNTAINEER PLANT, NEW HAVEN | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.