EPA Air · violations by county and year
High-priority air violations in Yellowstone County, Montana, 2017
- 9Violations
A high-priority violation is the most serious class of Clean Air Act non-compliance an agency records against a source; a federally reportable violation is the next step down in severity. Each row below is one violation recorded against a source in Yellowstone County, Montana during 2017. 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, 2017
- Inspections 12
- Stack tests 105
High-priority air violations in Yellowstone County, other years
- 2018 6
High-priority air violations recorded in Yellowstone County, Montana, 2017
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2017-12-04 | YELLOWSTONE POWER PLANT — high-priority violation on file | Earliest FRV determination | State |
| 2017-11-22 | CHS INC REFINERY LAUREL | Earliest FRV determination | State |
| 2017-10-27 | BILLINGS TRANSPORTATION OPERATIONS | HPV day-zero determination | State |
| 2017-09-27 | YELLOWSTONE POWER PLANT — high-priority violation on file | Earliest FRV determination | State |
| 2017-08-21 | PAR MONTANA BILLINGS REFINERY | Earliest FRV determination | State |
| 2017-05-23 | YELLOWSTONE POWER PLANT — high-priority violation on file | HPV day-zero determination | State |
| 2017-05-18 | YELLOWSTONE POWER PLANT — high-priority violation on file | HPV day-zero determination | State |
| 2017-03-17 | BILLINGS REFINERY | Earliest FRV determination | State |
| 2017-03-14 | PAR MONTANA BILLINGS REFINERY | Earliest FRV determination | State |
Dates as filed by the agency that recorded the violation. Figures from EPA’s ICIS-AIR download.