EPA Air · stack tests by state, industry and year
Mining and quarrying (NAICS 2122): stack tests in Michigan, 2025
- 3Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row is one stack test recorded during 2025 at a Michigan source whose primary industry code is NAICS 2122. A facility filing more than one industry code is counted under the first one on its record.
Other industries in Michigan, 2025
- Utilities (NAICS 2211) 113
- Petroleum and coal products manufacturing (NAICS 3241) 37
- Paper manufacturing (NAICS 3221) 21
- Chemical manufacturing (NAICS 3251) 20
- Nonmetallic mineral product manufacturing (NAICS 3273) 17
- Utilities (NAICS 2213) 15
- Waste management and remediation (NAICS 5622) 14
- Pipeline transportation (NAICS 4862) 13
- Utilities (NAICS 2212) 11
- Food manufacturing (NAICS 3113) 11
- Transportation equipment manufacturing (NAICS 3363) 11
- Transportation equipment manufacturing (NAICS 3361) 10
- Primary metal manufacturing (NAICS 3311) 9
- Wood product manufacturing (NAICS 3212) 9
- Educational services (NAICS 6113) 8
- Plastics and rubber products manufacturing (NAICS 3261) 7
- Fabricated metal product manufacturing (NAICS 3328) 7
- Oil and gas extraction (NAICS 2111) 6
- Food manufacturing (NAICS 3112) 5
- Professional, scientific and technical services (NAICS 5413) 5
- Chemical manufacturing (NAICS 3252) 5
- Primary metal manufacturing (NAICS 3315) 4
- Nonmetallic mineral product manufacturing (NAICS 3279) 3
- Chemical manufacturing (NAICS 3254) 3
Air-emissions stack tests recorded in Michigan, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-07-31 | TILDEN MINING COMPANY LC | ISHPEMING, Marquette, MI | Pass | State |
| 2025-07-09 | TILDEN MINING COMPANY LC | ISHPEMING, Marquette, MI | Pass | State |
| 2025-05-21 | TILDEN MINING COMPANY LC | ISHPEMING, Marquette, MI | Pass | State |
Primary NAICS code as filed on the facility record; dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.