EPA Air · stack tests by state, industry and year
Primary metal manufacturing (NAICS 3314): stack tests in Arizona, 2025
- 5Stack 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 Arizona source whose primary industry code is NAICS 3314. A facility filing more than one industry code is counted under the first one on its record.
Primary metal manufacturing (NAICS 3314) in Arizona, other years
Other industries in Arizona, 2025
- Utilities (NAICS 2211) 34
- Mining and quarrying (NAICS 2122) 14
- Computer and electronic product manufacturing (NAICS 3344) 10
- Nonmetallic mineral product manufacturing (NAICS 3273) 10
- Pipeline transportation (NAICS 4862) 9
- Merchant wholesalers, nondurable goods (NAICS 4247) 6
- Nonmetallic mineral product manufacturing (NAICS 3274) 6
- Primary metal manufacturing (NAICS 3311) 4
- Primary metal manufacturing (NAICS 3313) 3
- Data processing and hosting (NAICS 5182) 3
Air-emissions stack tests recorded in Arizona, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-11-24 | FREEPORT MCMORAN - MIAMI SMELTER | MIAMI, Gila, AZ | Pass | State |
| 2025-11-10 | ASARCO - HAYDEN SMELTER — high-priority violation on file | HAYDEN, Gila, AZ | Pass | State |
| 2025-11-10 | ASARCO - HAYDEN SMELTER — high-priority violation on file | HAYDEN, Gila, AZ | Pass | State |
| 2025-10-22 | FREEPORT MCMORAN - MIAMI SMELTER | MIAMI, Gila, AZ | Pass | State |
| 2025-04-23 | FREEPORT MCMORAN - MIAMI SMELTER | MIAMI, Gila, AZ | 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.