EPA Air · stack tests by state and year
Air-emissions stack tests in Montana, 2024
- 180Stack 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 2024; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in Montana, 2024
- Yellowstone County 82
- Rosebud County 18
- Glacier County 14
- Deer Lodge County 12
- Silver Bow County 9
- Big Horn County 7
- Flathead County 7
- Fallon County 6
- Richland County 6
- Valley County 5
- Roosevelt County 4
- Jefferson County 4
Montana, other years
Air-emissions stack tests recorded in Montana, 2024
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2024-07-22 | YELLOWSTONE COUNTY GENERATING STATION | LAUREL, Yellowstone, MT | Pass | State |
| 2024-07-22 | YELLOWSTONE COUNTY GENERATING STATION | LAUREL, Yellowstone, MT | Pass | State |
| 2024-07-22 | YELLOWSTONE COUNTY GENERATING STATION | LAUREL, Yellowstone, MT | Pass | State |
| 2024-07-22 | YELLOWSTONE COUNTY GENERATING STATION | LAUREL, Yellowstone, MT | Pass | State |
| 2024-07-20 | PAR MONTANA BULK TERMINAL | BILLINGS, Yellowstone, MT | Pass | State |
| 2024-07-19 | WILLISTON BASIN - HATHAWAY STATION | HATHAWAY, Rosebud, MT | Pass | State |
| 2024-07-19 | WILLISTON BASIN - FORT PECK STATION | NASHUA, Valley, MT | Pass | State |
| 2024-07-19 | YELLOWSTONE POWER PLANT — high-priority violation on file | BILLINGS, Yellowstone, MT | Pass | State |
| 2024-06-28 | CHARLIE CREEK COMPRESSOR STATION | LAMBERT, Richland, MT | Pass | State |
| 2024-06-04 | QUALA SERVICES | MILES CITY, Custer, MT | Pass | State |
| 2024-05-31 | PAR MONTANA BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2024-05-31 | PAR MONTANA BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2024-05-30 | PAR MONTANA BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2024-05-21 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2024-05-21 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2024-05-21 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2024-05-21 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2024-05-13 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2024-05-13 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2024-05-10 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2024-05-09 | YELLOWSTONE POWER PLANT — high-priority violation on file | BILLINGS, Yellowstone, MT | Pass | State |
| 2024-05-09 | YELLOWSTONE POWER PLANT — high-priority violation on file | BILLINGS, Yellowstone, MT | Pass | State |
| 2024-05-03 | BAINVILLE STATION | BAINVILLE, Roosevelt, MT | Pass | State |
| 2024-04-29 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2024-04-24 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2024-04-24 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2024-04-17 | NORTHWESTERN ENERGY MAINLINE #1 | CUT BANK, Glacier, MT | Pass | State |
| 2024-04-17 | NORTHWESTERN ENERGY MAINLINE #1 | CUT BANK, Glacier, MT | Pass | State |
| 2024-04-17 | NORTHWESTERN ENERGY MAINLINE #1 | CUT BANK, Glacier, MT | Pass | State |
| 2024-04-17 | NORTHWESTERN ENERGY MAINLINE #1 | CUT BANK, Glacier, MT | Pass | State |
| 2024-04-17 | NORTHWESTERN ENERGY MAINLINE #1 | CUT BANK, Glacier, MT | Pass | State |
| 2024-04-17 | NORTHWESTERN ENERGY MAINLINE #1 | CUT BANK, Glacier, MT | Pass | State |
| 2024-04-14 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2024-04-03 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2024-04-03 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2024-04-02 | MDU - LEWIS & CLARK STATION | SIDNEY, Richland, MT | Pass | State |
| 2024-04-02 | MDU - LEWIS & CLARK STATION | SIDNEY, Richland, MT | Pass | State |
| 2024-04-02 | MDU - LEWIS & CLARK STATION | SIDNEY, Richland, MT | Pass | State |
| 2024-04-01 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2024-04-01 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2024-03-28 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2024-03-28 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2024-03-28 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2024-03-28 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2024-03-24 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2024-03-19 | WILLISTON BASIN - CABIN CREEK | BAKER, Fallon, MT | Pass | State |
| 2024-03-13 | WILLISTON BASIN - CABIN CREEK | BAKER, Fallon, MT | Pass | State |
| 2024-03-13 | WILLISTON BASIN - CABIN CREEK | BAKER, Fallon, MT | Pass | State |
| 2024-03-11 | MSU - CENTRAL HEATING PLANT | BOZEMAN, Gallatin, MT | Pass | State |
| 2024-03-11 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2024-03-11 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2024-03-11 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2024-03-11 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2024-03-11 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2024-03-11 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2024-03-11 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2024-03-11 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2024-03-11 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | Pass | State |
| 2024-03-06 | BAINVILLE STATION | BAINVILLE, Roosevelt, MT | Pass | State |
| 2024-03-04 | COLSTRIP ENERGY LTD PARTNERSHIP | COLSTRIP, Rosebud, MT | Pass | State |
| 2024-02-13 | DRY CREEK FIELD STATION 056 | RED LODGE, Carbon, MT | Pass | State |
| 2024-02-13 | PAR MONTANA BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2024-02-05 | DAVE GATES GENERATING STATION AT MILL CREEK | ANACONDA, Deer Lodge, MT | Pass | State |
| 2024-02-05 | DAVE GATES GENERATING STATION AT MILL CREEK | ANACONDA, Deer Lodge, MT | Pass | State |
| 2024-02-05 | DAVE GATES GENERATING STATION AT MILL CREEK | ANACONDA, Deer Lodge, MT | Pass | State |
| 2024-02-05 | DAVE GATES GENERATING STATION AT MILL CREEK | ANACONDA, Deer Lodge, MT | Pass | State |
| 2024-02-05 | DAVE GATES GENERATING STATION AT MILL CREEK | ANACONDA, Deer Lodge, MT | Pass | State |
| 2024-02-05 | DAVE GATES GENERATING STATION AT MILL CREEK | ANACONDA, Deer Lodge, MT | Pass | State |
| 2024-01-29 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2024-01-28 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2024-01-22 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2024-01-19 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2024-01-12 | NORTHWESTERN ENERGY MAINLINE #1 | CUT BANK, Glacier, MT | Pass | State |
| 2024-01-12 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2024-01-12 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2024-01-12 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2024-01-07 | WILLISTON BASIN - CABIN CREEK | BAKER, Fallon, MT | Pass | State |
| 2024-01-05 | WILLISTON BASIN - HATHAWAY STATION | HATHAWAY, Rosebud, MT | Pass | State |
| 2024-01-05 | WILLISTON BASIN - CABIN CREEK | BAKER, Fallon, MT | Pass | State |
| 2024-01-05 | WILLISTON BASIN - FORT PECK STATION | NASHUA, Valley, MT | Pass | State |
PreviousPage 1Page 2 of 2
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.