EPA Air · stack tests by county and year
Air-emissions stack tests in Fallon County, Montana, 2025
- 13Stack 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 Fallon County, Montana 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 Fallon County facility page.
Air-emissions stack tests in Fallon County, other years
Air-emissions stack tests recorded in Fallon County, Montana, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-12-30 | WILLISTON BASIN - MONARCH STATION | Pass | State |
| 2025-12-30 | WILLISTON BASIN - MONARCH STATION | Pass | State |
| 2025-07-21 | WILLISTON BASIN - CABIN CREEK | Pass | State |
| 2025-04-28 | WILLISTON BASIN - LITTLE BEAVER | Pass | State |
| 2025-04-28 | WILLISTON BASIN - LITTLE BEAVER | Pass | State |
| 2025-04-09 | WILLISTON BASIN - CABIN CREEK | Pass | State |
| 2025-04-09 | WILLISTON BASIN - CABIN CREEK | Pass | State |
| 2025-04-09 | WILLISTON BASIN - CABIN CREEK | Pass | State |
| 2025-03-28 | WILLISTON BASIN - MONARCH STATION | Pass | State |
| 2025-01-07 | WILLISTON BASIN - LITTLE BEAVER | Pass | State |
| 2025-01-07 | WILLISTON BASIN - LITTLE BEAVER | Pass | State |
| 2025-01-07 | WILLISTON BASIN - CABIN CREEK | Pass | State |
| 2025-01-07 | WILLISTON BASIN - CABIN CREEK | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.