EPA Air · stack tests by county and year
Air-emissions stack tests in Gila County, Arizona, 2025
- 6Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row below is one stack test recorded against a source in Gila County, Arizona during 2025. 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 Gila County facility page.
Gila County, Arizona, 2025
- Inspections 10
Air-emissions stack tests in Gila County, other years
Air-emissions stack tests recorded in Gila County, Arizona, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-12-17 | PINTO VALLEY MINE | Pass | State |
| 2025-11-24 | FREEPORT MCMORAN - MIAMI SMELTER | Pass | State |
| 2025-11-10 | ASARCO - HAYDEN SMELTER — high-priority violation on file | Pass | State |
| 2025-11-10 | ASARCO - HAYDEN SMELTER — high-priority violation on file | Pass | State |
| 2025-10-22 | FREEPORT MCMORAN - MIAMI SMELTER | Pass | State |
| 2025-04-23 | FREEPORT MCMORAN - MIAMI SMELTER | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.