EPA Air · by county
Air-emissions sources in Knox County, Maine
- 22Facilities
Every stationary source in Knox County, Maine 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 Knox 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.
Inspections in Knox 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 12
- 2025 — inspections 24
- 2024 — inspections 23
- 2023 — inspections 22
- 2022 — inspections 25
- 2021 — inspections 32
- 2020 — inspections 19
- 2019 — inspections 23
- 2018 — inspections 13
- 2017 — inspections 9
Facilities
| Facility↑↓ | Classification↑↓ | HPV |
|---|---|---|
| DANISCO USA INC. | Major source | No |
| DICAPERL MINERALS CORP. | Minor source | No |
| DOUGLAS DYNAMICS, L.L.C. | Synthetic minor source | No |
| EUROVIA ATLANTIC COAST LLC | Synthetic minor source | No |
| FERRAIOLO CONSTRUCTION, INC. | Synthetic minor source | No |
| FERRAIOLO CONSTRUCTION, INC. | Synthetic minor source | No |
| FOX ISLAND ELECTRIC COOPERATIVE, INC. | Synthetic minor source | No |
| GEORGE C. HALL & SONS INC. | Minor source | No |
| HEIDELBERG MATERIALS US CEMENT LLC | Major source | Yes |
| JAKE BARBOUR, INC. | Minor source | No |
| JAKE BORBOUR, INC. | Minor source | No |
| JAKE BORBOUR, INC. | Minor source | No |
| MAINE DEPARTMENT OF CORRECTIONS, MAINE STATE PRISON | Synthetic minor source | No |
| MIDCOAST CREMATORY, INC. | Minor source | No |
| MILLS EXCAVATION, INC. | Minor source | No |
| MILLS EXCAVATION, INC. | Minor source | No |
| NORTH END COMPOSITES LLC | Major source | No |
| PARK STREET LAUNDRY AND DRYCLEANERS | Minor source | No |
| PATTERSON ASPHALT INDUSTRIES LLC | Synthetic minor source | No |
| PENOBSCOT BAY MEDICAL CENTER | Synthetic minor source | No |
| PIKE INDUSTRIES, INC. | Synthetic minor source | No |
| ROCKLAND MARINE CORPORATION | Minor source | No |
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.