EPA Air · inspections by county and year
Air-emissions inspections in Yellowstone County, 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 below is one inspection recorded against a source in Yellowstone County, Montana during 2026. A facility can appear several times: this is the year’s record of what happened, not a list of places. The sources themselves are on the Yellowstone County facility page.
Yellowstone County, Montana, 2026
- Stack tests 22
Air-emissions inspections in Yellowstone County, other years
Air-emissions inspections recorded in Yellowstone County, Montana, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-07-30 | BILLINGS TRANSPORTATION OPERATIONS | FCE On-Site | State |
| 2026-06-04 | BILLINGS REFINERY | PCE On-Site | U.S. EPA |
| 2026-03-09 | BILLINGS BAKERY | FCE On-Site | State |
| 2026-01-22 | CHS INC REFINERY LAUREL | PCE Off-Site | U.S. EPA |
Dates as filed by the agency that recorded the inspection. Figures from EPA’s ICIS-AIR download.