EPA Air · inspections by county and year
Air-emissions inspections in Yellowstone County, Montana, 2021
- 6Inspections
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 2021. 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, 2021
- Stack tests 67
Air-emissions inspections in Yellowstone County, other years
Air-emissions inspections recorded in Yellowstone County, Montana, 2021
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2021-09-30 | CHS INC REFINERY LAUREL | FCE On-Site | State |
| 2021-07-22 | BILLINGS REFINERY | PCE Off-Site | State |
| 2021-06-30 | MONTANA SULPHUR & CHEMICAL | FCE On-Site | State |
| 2021-06-11 | YELLOWSTONE POWER PLANT — high-priority violation on file | FCE On-Site | State |
| 2021-05-10 | WESTERN SUGAR COOPERATIVE — high-priority violation on file | FCE On-Site | State |
| 2021-03-09 | BILLINGS TRANSPORTATION OPERATIONS | PCE Off-Site | State |
Dates as filed by the agency that recorded the inspection. Figures from EPA’s ICIS-AIR download.