EPA Air · stack tests by county and year
Air-emissions stack tests in Rosebud County, Montana, 2024
- 18Stack 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 Rosebud County, Montana during 2024. 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 Rosebud County facility page.
Rosebud County, Montana, 2024
Air-emissions stack tests in Rosebud County, other years
Air-emissions stack tests recorded in Rosebud County, Montana, 2024
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2024-12-20 | COLSTRIP ENERGY LTD PARTNERSHIP | Pass | State |
| 2024-12-20 | COLSTRIP ENERGY LTD PARTNERSHIP | Pass | State |
| 2024-12-20 | COLSTRIP ENERGY LTD PARTNERSHIP | Pass | State |
| 2024-10-24 | WILLISTON BASIN - HATHAWAY STATION | Pass | State |
| 2024-10-03 | COLSTRIP STEAM ELECTRIC STATION | Pass | State |
| 2024-10-03 | COLSTRIP STEAM ELECTRIC STATION | Pass | State |
| 2024-07-19 | WILLISTON BASIN - HATHAWAY STATION | Pass | State |
| 2024-05-13 | COLSTRIP STEAM ELECTRIC STATION | Pass | State |
| 2024-05-13 | COLSTRIP STEAM ELECTRIC STATION | Pass | State |
| 2024-04-03 | COLSTRIP STEAM ELECTRIC STATION | Pass | State |
| 2024-04-03 | COLSTRIP STEAM ELECTRIC STATION | Pass | State |
| 2024-03-28 | COLSTRIP STEAM ELECTRIC STATION | Pass | State |
| 2024-03-28 | COLSTRIP STEAM ELECTRIC STATION | Pass | State |
| 2024-03-28 | COLSTRIP STEAM ELECTRIC STATION | Pass | State |
| 2024-03-28 | COLSTRIP STEAM ELECTRIC STATION | Pass | State |
| 2024-03-04 | COLSTRIP ENERGY LTD PARTNERSHIP | Pass | State |
| 2024-01-29 | COLSTRIP STEAM ELECTRIC STATION | Pass | State |
| 2024-01-05 | WILLISTON BASIN - HATHAWAY STATION | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.