EPA Air · stack tests by state and year
Air-emissions stack tests in Montana, 2022
- 155Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Every stack test below was recorded against a source in Montana during 2022; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in Montana, 2022
- Yellowstone County 56
- Cascade County 16
- Rosebud County 13
- Glacier County 12
- Silver Bow County 9
- Fallon County 8
- Valley County 7
- Deer Lodge County 6
- Big Horn County 5
- Jefferson County 5
- Gallatin County 5
- Flathead County 3
Montana, other years
Air-emissions stack tests recorded in Montana, 2022
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2022-05-02 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-04-28 | YELLOWSTONE POWER PLANT — high-priority violation on file | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-04-12 | TRIDENT | THREE FORKS, Gallatin, MT | Pass | State |
| 2022-04-12 | TRIDENT | THREE FORKS, Gallatin, MT | Pass | State |
| 2022-04-07 | BASIN ELECTRIC POWER COOPERATIVE | BAINVILLE, Roosevelt, MT | Pass | State |
| 2022-04-06 | ROCKY MOUNTAIN POWER | HARDIN, Big Horn, MT | Pass | State |
| 2022-04-06 | WILLISTON BASIN - LITTLE BEAVER | BAKER, Fallon, MT | Pass | State |
| 2022-04-06 | WILLISTON BASIN - CABIN CREEK | BAKER, Fallon, MT | Pass | State |
| 2022-04-06 | WILLISTON BASIN - CABIN CREEK | BAKER, Fallon, MT | Pass | State |
| 2022-04-06 | NORTHWESTERN ENERGY MAINLINE #1 | CUT BANK, Glacier, MT | Pass | State |
| 2022-04-06 | NORTHWESTERN ENERGY MAINLINE #1 | CUT BANK, Glacier, MT | Pass | State |
| 2022-04-06 | NORTHWESTERN ENERGY MAINLINE #1 | CUT BANK, Glacier, MT | Pass | State |
| 2022-04-06 | NORTHWESTERN ENERGY MAINLINE #1 | CUT BANK, Glacier, MT | Pass | State |
| 2022-04-06 | NORTHWESTERN ENERGY MAINLINE #1 | CUT BANK, Glacier, MT | Pass | State |
| 2022-04-06 | NORTHWESTERN ENERGY MAINLINE #1 | CUT BANK, Glacier, MT | Pass | State |
| 2022-03-23 | PAR MONTANA BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-03-21 | MSU - CENTRAL HEATING PLANT | BOZEMAN, Gallatin, MT | Pass | State |
| 2022-03-21 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2022-03-21 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2022-03-21 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2022-03-21 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2022-03-21 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2022-03-21 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2022-03-21 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2022-03-21 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2022-03-21 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2022-03-16 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2022-03-16 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2022-03-16 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2022-03-15 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2022-03-04 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2022-03-04 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2022-02-24 | NORTH MOULTON FIELD | SHELBY, Toole, MT | Pass | State |
| 2022-02-15 | CALUMET MONTANA REFINING — high-priority violation on file | GREAT FALLS, Cascade, MT | Pass | State |
| 2022-02-15 | CALUMET MONTANA REFINING — high-priority violation on file | GREAT FALLS, Cascade, MT | Pass | State |
| 2022-02-07 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-02-04 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-02-04 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-02-04 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-01-28 | WESTERN SUGAR COOPERATIVE — high-priority violation on file | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-01-27 | ROCKY MOUNTAIN POWER | HARDIN, Big Horn, MT | Pass | State |
| 2022-01-25 | WILLISTON BASIN - FORT PECK STATION | NASHUA, Valley, MT | Pass | State |
| 2022-01-25 | WILLISTON BASIN - FORT PECK STATION | NASHUA, Valley, MT | Pass | State |
| 2022-01-25 | WILLISTON BASIN - SACO | SACO, Phillips, MT | Pass | State |
| 2022-01-25 | WILLISTON BASIN - SACO | SACO, Phillips, MT | Pass | State |
| 2022-01-23 | COLSTRIP ENERGY LTD PARTNERSHIP | COLSTRIP, Rosebud, MT | Pass | State |
| 2022-01-18 | ROCKY MOUNTAIN POWER | HARDIN, Big Horn, MT | Pass | State |
| 2022-01-12 | DAVE GATES GENERATING STATION AT MILL CREEK | ANACONDA, Deer Lodge, MT | Pass | State |
| 2022-01-12 | DAVE GATES GENERATING STATION AT MILL CREEK | ANACONDA, Deer Lodge, MT | Pass | State |
| 2022-01-12 | DAVE GATES GENERATING STATION AT MILL CREEK | ANACONDA, Deer Lodge, MT | Pass | State |
| 2022-01-12 | DAVE GATES GENERATING STATION AT MILL CREEK | ANACONDA, Deer Lodge, MT | Pass | State |
| 2022-01-12 | DAVE GATES GENERATING STATION AT MILL CREEK | ANACONDA, Deer Lodge, MT | Pass | State |
| 2022-01-12 | DAVE GATES GENERATING STATION AT MILL CREEK | ANACONDA, Deer Lodge, MT | Pass | State |
| 2022-01-06 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2022-01-06 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
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Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.