EPA Air · stack tests by county and year
Air-emissions stack tests in Henderson County, Kentucky, 2025
- 8Stack 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 Henderson County, Kentucky 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 Henderson County facility page.
Henderson County, Kentucky, 2025
Air-emissions stack tests in Henderson County, other years
Air-emissions stack tests recorded in Henderson County, Kentucky, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-10-28 | HYDRO ALUMINUM METALS USA LLC | Pass | State |
| 2025-10-20 | CENTURY ALUMINUM SEBREE LLC | Pass | State |
| 2025-10-13 | CENTURY ALUMINUM SEBREE LLC | Pass | State |
| 2025-04-23 | CENTURY ALUMINUM SEBREE LLC | Pass | State |
| 2025-04-23 | CENTURY ALUMINUM SEBREE LLC | Pass | State |
| 2025-03-25 | CENTURY ALUMINUM SEBREE LLC | Pass | State |
| 2025-03-11 | CENTURY ALUMINUM SEBREE LLC | Pass | State |
| 2025-01-14 | TEXAS GAS TRANSMISSION LLC - DIXIE TRANSMISSION STATION | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.