EPA Air · stack tests by state, industry and year
Utilities (NAICS 2211): stack tests in Montana, 2021
- 46Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row is one stack test recorded during 2021 at a Montana source whose primary industry code is NAICS 2211. A facility filing more than one industry code is counted under the first one on its record.
Utilities (NAICS 2211) in Montana, other years
Other industries in Montana, 2021
- Petroleum and coal products manufacturing (NAICS 3241) 66
- Pipeline transportation (NAICS 4862) 46
- Oil and gas extraction (NAICS 2111) 20
- Nonmetallic mineral product manufacturing (NAICS 3273) 14
- Food manufacturing (NAICS 3113) 5
- Wood product manufacturing (NAICS 3212) 4
- Wood product manufacturing (NAICS 3211) 4
- Merchant wholesalers, nondurable goods (NAICS 4247) 3
- Chemical manufacturing (NAICS 3251) 3
Air-emissions stack tests recorded in Montana, 2021
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2021-12-21 | MDU - GLENDIVE | GLENDIVE, Dawson, MT | Pass | State |
| 2021-12-21 | MDU - GLENDIVE | GLENDIVE, Dawson, MT | Pass | State |
| 2021-11-18 | COLSTRIP ENERGY LTD PARTNERSHIP | COLSTRIP, Rosebud, MT | Pass | State |
| 2021-11-18 | COLSTRIP ENERGY LTD PARTNERSHIP | COLSTRIP, Rosebud, MT | Pass | State |
| 2021-10-28 | YELLOWSTONE POWER PLANT — high-priority violation on file | BILLINGS, Yellowstone, MT | Pass | State |
| 2021-10-15 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2021-10-15 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2021-10-08 | ROCKY MOUNTAIN POWER | HARDIN, Big Horn, MT | Pass | State |
| 2021-10-08 | ROCKY MOUNTAIN POWER | HARDIN, Big Horn, MT | Pass | State |
| 2021-10-08 | ROCKY MOUNTAIN POWER | HARDIN, Big Horn, MT | Pass | State |
| 2021-07-22 | ROCKY MOUNTAIN POWER | HARDIN, Big Horn, MT | Pass | State |
| 2021-07-01 | ROCKY MOUNTAIN POWER | HARDIN, Big Horn, MT | Pass | State |
| 2021-05-27 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2021-05-27 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2021-05-12 | MDU - LEWIS & CLARK STATION | SIDNEY, Richland, MT | Pass | State |
| 2021-05-12 | MDU - LEWIS & CLARK STATION | SIDNEY, Richland, MT | Pass | State |
| 2021-05-05 | YELLOWSTONE POWER PLANT — high-priority violation on file | BILLINGS, Yellowstone, MT | Pass | State |
| 2021-05-03 | YELLOWSTONE POWER PLANT — high-priority violation on file | BILLINGS, Yellowstone, MT | Pass | State |
| 2021-04-27 | MDU - LEWIS & CLARK STATION | SIDNEY, Richland, MT | Pass | State |
| 2021-04-19 | ROCKY MOUNTAIN POWER | HARDIN, Big Horn, MT | Pass | State |
| 2021-03-19 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2021-03-19 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2021-03-18 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2021-03-18 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2021-03-12 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2021-03-12 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2021-03-12 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2021-03-12 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2021-03-12 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2021-03-12 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2021-03-12 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2021-03-12 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2021-03-12 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2021-03-05 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2021-03-05 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2021-01-29 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2021-01-29 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2021-01-28 | COLSTRIP ENERGY LTD PARTNERSHIP | COLSTRIP, Rosebud, MT | Pass | State |
| 2021-01-21 | ROCKY MOUNTAIN POWER | HARDIN, Big Horn, MT | Pass | State |
| 2021-01-12 | ROCKY MOUNTAIN POWER | HARDIN, Big Horn, MT | Pass | State |
| 2021-01-11 | DAVE GATES GENERATING STATION AT MILL CREEK | ANACONDA, Deer Lodge, MT | Pass | State |
| 2021-01-11 | DAVE GATES GENERATING STATION AT MILL CREEK | ANACONDA, Deer Lodge, MT | Pass | State |
| 2021-01-11 | DAVE GATES GENERATING STATION AT MILL CREEK | ANACONDA, Deer Lodge, MT | Pass | State |
| 2021-01-11 | DAVE GATES GENERATING STATION AT MILL CREEK | ANACONDA, Deer Lodge, MT | Pass | State |
| 2021-01-11 | DAVE GATES GENERATING STATION AT MILL CREEK | ANACONDA, Deer Lodge, MT | Pass | State |
| 2021-01-11 | DAVE GATES GENERATING STATION AT MILL CREEK | ANACONDA, Deer Lodge, MT | Pass | State |
Primary NAICS code as filed on the facility record; dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.