EPA Air · stack tests by county and year
Air-emissions stack tests in Apache County, Arizona, 2026
- 5Stack 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 Apache County, Arizona during 2026. 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 Apache County facility page.
Air-emissions stack tests in Apache County, other years
Air-emissions stack tests recorded in Apache County, Arizona, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-06-09 | CORONADO GENERATING PLANT | Pass | State |
| 2026-02-04 | TUCSON ELECTRIC POWER - SPRINGERVILLE GENERATING STATION | Pass | State |
| 2026-02-03 | TUCSON ELECTRIC POWER - SPRINGERVILLE GENERATING STATION | Pass | State |
| 2026-02-02 | TUCSON ELECTRIC POWER - SPRINGERVILLE GENERATING STATION | Pass | State |
| 2026-01-30 | TUCSON ELECTRIC POWER - SPRINGERVILLE GENERATING STATION | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.