EPA Air · inspections by state, industry and year
Petroleum and coal products manufacturing (NAICS 3241): inspections in Montana, 2026
- 4Inspections
A compliance evaluation is the on-site or file review a state, local or federal air agency records against a permitted source. Each row is one inspection recorded during 2026 at a Montana source whose primary industry code is NAICS 3241. A facility filing more than one industry code is counted under the first one on its record.
Petroleum and coal products manufacturing (NAICS 3241) in Montana, other years
Other industries in Montana, 2026
Air-emissions inspections recorded in Montana, 2026
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2026-07-28 | CALUMET MONTANA REFINING — high-priority violation on file | GREAT FALLS, Cascade, MT | PCE Off-Site | State |
| 2026-07-16 | TREASURE STATE CONCRETE, INC. | MONTANA, Undetermined, MT | FCE On-Site | U.S. EPA |
| 2026-06-04 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | PCE On-Site | U.S. EPA |
| 2026-01-22 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | PCE Off-Site | U.S. EPA |
Primary NAICS code as filed on the facility record; dates as filed by the agency that recorded the inspection. Figures from EPA’s ICIS-AIR download.