EPA Air · inspections by state and year
Air-emissions inspections in Montana, 2025
- 35Inspections
A compliance evaluation is the on-site or file review a state, local or federal air agency records against a permitted source. Every inspection below was recorded against a source in Montana during 2025; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in Montana, 2025
Montana, other years
Air-emissions inspections recorded in Montana, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-11-05 | YELLOWSTONE COUNTY GENERATING STATION | LAUREL, Yellowstone, MT | FCE On-Site | State |
| 2025-09-29 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | FCE On-Site | State |
| 2025-09-26 | STILLWATER MINE | NYE, Stillwater, MT | FCE On-Site | State |
| 2025-09-23 | MONTANA SULPHUR & CHEMICAL | BILLINGS, Yellowstone, MT | FCE On-Site | State |
| 2025-09-18 | WILLISTON BASIN - FORT PECK STATION | NASHUA, Valley, MT | FCE Off-Site | State |
| 2025-09-17 | ALOE VENTURES FACILITY | SHELBY, Toole, MT | FCE Off-Site | State |
| 2025-09-16 | ABSALOKA MINE | HARDIN, Big Horn, MT | FCE On-Site | State |
| 2025-09-02 | BARRETTS MILL | DILLON, Beaverhead, MT | FCE On-Site | State |
| 2025-09-02 | ROCKY MOUNTAIN LABORATORIES FACILITY | HAMILTON, Ravalli, MT | FCE On-Site | State |
| 2025-08-27 | ABSALOKA MINE | HARDIN, Big Horn, MT | PCE On-Site | State |
| 2025-08-26 | WESTERN SUGAR COOPERATIVE — high-priority violation on file | BILLINGS, Yellowstone, MT | FCE On-Site | State |
| 2025-08-18 | GREAT FALLS RENEWABLE DIESEL PLANT | GREAT FALLS, Cascade, MT | FCE On-Site | State |
| 2025-08-18 | TRIDENT | THREE FORKS, Gallatin, MT | FCE On-Site | State |
| 2025-08-07 | LEWIS AND CLARK COUNTY LANDFILL | HELENA, Lewis and Clark, MT | FCE On-Site | State |
| 2025-07-29 | PHILLIPS 66 COMPANY - MISSOULA | MISSOULA, Missoula, MT | FCE Off-Site | State |
| 2025-07-14 | BLACK BUTTE COPPER PROJECT | WHITE SULPHUR SPRINGS, Meagher, MT | FCE On-Site | State |
| 2025-07-03 | BAKKEN GATHERING PLANT | SIDNEY, Richland, MT | FCE On-Site | State |
| 2025-07-01 | ASH GROVE CEMENT | CLANCY, Jefferson, MT | FCE On-Site | State |
| 2025-07-01 | ALLIED WASTE SYSTEMS | MISSOULA, Missoula, MT | FCE On-Site | State |
| 2025-06-26 | BASIN ELECTRIC POWER COOPERATIVE | BAINVILLE, Roosevelt, MT | FCE On-Site | State |
| 2025-06-26 | MONTANA SILVERSMITHS INC | COLUMBUS, Stillwater, MT | FCE On-Site | State |
| 2025-06-18 | DAVE GATES GENERATING STATION AT MILL CREEK | ANACONDA, Deer Lodge, MT | FCE On-Site | State |
| 2025-06-09 | WEYERHAEUSER-CFALLS — high-priority violation on file | COLUMBIA FALLS, Flathead, MT | FCE On-Site | State |
| 2025-06-02 | ROCKY MOUNTAIN POWER | HARDIN, Big Horn, MT | FCE On-Site | State |
| 2025-05-29 | YELLOWSTONE POWER PLANT — high-priority violation on file | BILLINGS, Yellowstone, MT | FCE On-Site | State |
| 2025-05-27 | BASIN CREEK POWER SERVICES | BUTTE, Silver Bow, MT | FCE On-Site | State |
| 2025-05-15 | CHARLIE CREEK COMPRESSOR STATION | LAMBERT, Richland, MT | FCE Off-Site | State |
| 2025-05-06 | FLATHEAD ELECTRIC LFGE FACILITY | KALISPELL, Flathead, MT | FCE On-Site | State |
| 2025-05-02 | BATTLE CREEK COMPRESSOR STATION - BLAINE COUNTY | CHINOOK, Blaine, MT | FCE Off-Site | State |
| 2025-05-02 | TELSTAD FIELD STATION 033 | SHELBY, Toole, MT | FCE Off-Site | State |
| 2025-04-18 | STILLWATER MINING CO SMELTER | COLUMBUS, Stillwater, MT | FCE On-Site | State |
| 2025-04-17 | MSU - CENTRAL HEATING PLANT | BOZEMAN, Gallatin, MT | FCE On-Site | State |
| 2025-03-25 | FLATHEAD ELECTRIC LFGE FACILITY | KALISPELL, Flathead, MT | PCE Off-Site | State |
| 2025-03-11 | NORTHERN BORDER PIPELINE CO STA 1 | GLASGOW, Valley, MT | FCE Off-Site | State |
| 2025-02-06 | BLAINE COUNTY #1 | CHINOOK, Blaine, MT | FCE Off-Site | State |
Dates as filed by the agency that recorded the inspection. Figures from EPA’s ICIS-AIR download.