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 |
|---|---|---|---|---|
| 2022-12-28 | WESTERN SUGAR COOPERATIVE — high-priority violation on file | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-12-27 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-12-27 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-12-27 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-12-27 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-12-27 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-12-27 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-12-27 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-12-27 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-12-27 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-12-27 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-12-27 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-12-27 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-12-19 | DRY CREEK FIELD STATION 056 | RED LODGE, Carbon, MT | Pass | State |
| 2022-12-19 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-12-16 | WILLISTON BASIN - MONARCH STATION | BAKER, Fallon, MT | Pass | State |
| 2022-12-16 | WILLISTON BASIN - MONARCH STATION | BAKER, Fallon, MT | Pass | State |
| 2022-12-12 | YELLOWSTONE POWER PLANT — high-priority violation on file | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-12-05 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-12-05 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-11-18 | WILLISTON BASIN - MONARCH STATION | BAKER, Fallon, MT | Pass | State |
| 2022-11-16 | WILLISTON BASIN - HATHAWAY STATION | HATHAWAY, Rosebud, MT | Pass | State |
| 2022-11-16 | WILLISTON BASIN - MONARCH STATION | BAKER, Fallon, MT | Pass | State |
| 2022-11-16 | WILLISTON BASIN - MONARCH STATION | BAKER, Fallon, MT | Pass | State |
| 2022-11-16 | WILLISTON BASIN - FORT PECK STATION | NASHUA, Valley, MT | Pass | State |
| 2022-11-16 | WILLISTON BASIN - FORT PECK STATION | NASHUA, Valley, MT | Pass | State |
| 2022-11-09 | ASH GROVE CEMENT | CLANCY, Jefferson, MT | Pass | State |
| 2022-11-07 | ASH GROVE CEMENT | CLANCY, Jefferson, MT | Pass | State |
| 2022-10-17 | ROCKY MOUNTAIN POWER | HARDIN, Big Horn, MT | Pass | State |
| 2022-10-17 | NORTHWESTERN ENERGY MAINLINE #1 | CUT BANK, Glacier, MT | Pass | State |
| 2022-10-17 | NORTHWESTERN ENERGY MAINLINE #1 | CUT BANK, Glacier, MT | Pass | State |
| 2022-10-17 | NORTHWESTERN ENERGY MAINLINE #1 | CUT BANK, Glacier, MT | Pass | State |
| 2022-10-17 | NORTHWESTERN ENERGY MAINLINE #1 | CUT BANK, Glacier, MT | Pass | State |
| 2022-10-17 | NORTHWESTERN ENERGY MAINLINE #1 | CUT BANK, Glacier, MT | Pass | State |
| 2022-10-17 | NORTHWESTERN ENERGY MAINLINE #1 | CUT BANK, Glacier, MT | Pass | State |
| 2022-09-30 | YELLOWSTONE POWER PLANT — high-priority violation on file | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-09-28 | WEYERHAEUSER-EVERGREEN — high-priority violation on file | KALISPELL, Flathead, MT | Pass | State |
| 2022-09-21 | ROCKY MOUNTAIN POWER | HARDIN, Big Horn, MT | Fail | State |
| 2022-09-15 | PAR MONTANA BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-09-14 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-09-14 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-09-07 | BAKKEN GATHERING PLANT | SIDNEY, Richland, MT | Pass | State |
| 2022-09-07 | BAKKEN GATHERING PLANT | SIDNEY, Richland, MT | Pass | State |
| 2022-08-23 | CALUMET MONTANA REFINING — high-priority violation on file | GREAT FALLS, Cascade, MT | Pass | State |
| 2022-08-08 | WEYERHAEUSER-CFALLS — high-priority violation on file | COLUMBIA FALLS, Flathead, MT | Pass | State |
| 2022-07-27 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-07-27 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-07-27 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-07-27 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-07-27 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-07-27 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-07-27 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-07-26 | WEYERHAEUSER-CFALLS — high-priority violation on file | COLUMBIA FALLS, Flathead, MT | Pass | State |
| 2022-07-22 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Fail | State |
| 2022-07-21 | CALUMET MONTANA REFINING — high-priority violation on file | GREAT FALLS, Cascade, MT | Pass | State |
| 2022-07-21 | CALUMET MONTANA REFINING — high-priority violation on file | GREAT FALLS, Cascade, MT | Pass | State |
| 2022-07-21 | CALUMET MONTANA REFINING — high-priority violation on file | GREAT FALLS, Cascade, MT | Pass | State |
| 2022-07-21 | CALUMET MONTANA REFINING — high-priority violation on file | GREAT FALLS, Cascade, MT | Pass | State |
| 2022-07-21 | CALUMET MONTANA REFINING — high-priority violation on file | GREAT FALLS, Cascade, MT | Pass | State |
| 2022-07-21 | CALUMET MONTANA REFINING — high-priority violation on file | GREAT FALLS, Cascade, MT | Pass | State |
| 2022-07-21 | CALUMET MONTANA REFINING — high-priority violation on file | GREAT FALLS, Cascade, MT | Pass | State |
| 2022-07-21 | CALUMET MONTANA REFINING — high-priority violation on file | GREAT FALLS, Cascade, MT | Pass | State |
| 2022-07-21 | PAR MONTANA BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-07-21 | PAR MONTANA BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-07-20 | ASH GROVE CEMENT | CLANCY, Jefferson, MT | Pass | State |
| 2022-07-20 | ASH GROVE CEMENT | CLANCY, Jefferson, MT | Pass | State |
| 2022-07-20 | ASH GROVE CEMENT | CLANCY, Jefferson, MT | Pass | State |
| 2022-07-18 | CALUMET MONTANA REFINING — high-priority violation on file | GREAT FALLS, Cascade, MT | Pass | State |
| 2022-07-18 | CALUMET MONTANA REFINING — high-priority violation on file | GREAT FALLS, Cascade, MT | Pass | State |
| 2022-07-15 | BILLINGS TRANSPORTATION OPERATIONS | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-07-08 | WILLISTON BASIN - FORT PECK STATION | NASHUA, Valley, MT | Pass | State |
| 2022-07-01 | TRIDENT | THREE FORKS, Gallatin, MT | Pass | State |
| 2022-07-01 | TRIDENT | THREE FORKS, Gallatin, MT | Pass | State |
| 2022-06-30 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-06-30 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-06-29 | STILLWATER MINING CO SMELTER | COLUMBUS, Stillwater, MT | Pass | State |
| 2022-06-29 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-06-29 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-06-29 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-06-29 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-06-29 | PAR MONTANA BULK TERMINAL | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-06-29 | PAR MONTANA BULK TERMINAL | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-06-27 | ROCKY MOUNTAIN LABORATORIES FACILITY | HAMILTON, Ravalli, MT | Pass | State |
| 2022-06-22 | WILLISTON BASIN - HATHAWAY STATION | HATHAWAY, Rosebud, MT | Pass | State |
| 2022-06-22 | WILLISTON BASIN - FORT PECK STATION | NASHUA, Valley, MT | Pass | State |
| 2022-06-22 | WILLISTON BASIN - FORT PECK STATION | NASHUA, Valley, MT | Pass | State |
| 2022-06-13 | DRY CREEK FIELD STATION 056 | RED LODGE, Carbon, MT | Pass | State |
| 2022-06-02 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2022-06-02 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2022-06-01 | PAR MONTANA BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2022-05-19 | MALMSTROM AFB | GREAT FALLS, Cascade, MT | Pass | State |
| 2022-05-19 | MALMSTROM AFB | GREAT FALLS, Cascade, MT | Pass | State |
| 2022-05-19 | MALMSTROM AFB | GREAT FALLS, Cascade, MT | Pass | State |
| 2022-05-02 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-05-02 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-05-02 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-05-02 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-05-02 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-05-02 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2022-05-02 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, 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.