EPA Air · by county
Air-emissions sources in Yellowstone County, Montana
- 24Facilities
Every stationary source in Yellowstone County, Montana that holds a Clean Air Act permit or is otherwise tracked by an air agency — planned, under construction, operating, seasonal or temporarily closed. Sources EPA records as permanently closed are not listed.
By emissions classification in Yellowstone County
A source’s classification is the size band its potential emissions put it in: a major source is large enough to need a Title V operating permit, a synthetic minor has accepted limits to stay below that line, and a minor source sits below it outright.
- Minor source 12
- Major source 10
Inspections in Yellowstone County, by year
A compliance evaluation is the on-site or file review a state, local or federal air agency records against a permitted source.
- 2026 — inspections 4
- 2025 — inspections 5
- 2024 — inspections 6
- 2023 — inspections 5
- 2022 — inspections 4
- 2021 — inspections 6
- 2020 — inspections 7
- 2019 — inspections 7
- 2018 — inspections 8
- 2017 — inspections 12
Facilities
| Facility↑↓ | Classification↑↓ | HPV |
|---|---|---|
| AIR CONTROLS CO. | Minor source | No |
| BILLINGS BAKERY | Synthetic minor source | No |
| BILLINGS CITY LANDFILL | Minor source | No |
| BILLINGS REFINERY | Major source | No |
| BILLINGS TRANSPORTATION OPERATIONS | Major source | No |
| BROWN'S AUTO SERVICE | Minor source | No |
| BUREAU INDIAN AFFAIRS (BIA) ASPHALT PLNT | Minor source | No |
| C&L TRUCK REPAIR | Minor source | No |
| CARL WEISSMAN & SONS | Minor source | No |
| CHS INC REFINERY LAUREL | Major source | No |
| CITY OF BILLINGS REGIONAL LANDFILL | Major source | No |
| GENSCO, INC. | Minor source | No |
| GOLDEN RECYCLING | Minor source | No |
| JIM'S QUALITY APPLIANCE | Minor source | No |
| MONTANA SULPHUR & CHEMICAL | Major source | No |
| PACIFIC RECYCLING | Minor source | No |
| PAR MONTANA BILLINGS REFINERY | Major source | No |
| PAR MONTANA BULK TERMINAL | Major source | No |
| POLY CONOCO AUTO REPAIR | Minor source | No |
| PRO TECH MECHANICAL INC. | Minor source | No |
| TRUENORTH STEEL - BILLINGS | Synthetic minor source | No |
| WESTERN SUGAR COOPERATIVE | Major source | Yes |
| YELLOWSTONE COUNTY GENERATING STATION | Major source | No |
| YELLOWSTONE POWER PLANT | Major source | Yes |
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.