EPA Air · stack tests by state, industry and year
Utilities (NAICS 2211): stack tests in Arizona, 2026
- 24Stack 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 2026 at a Arizona source whose primary industry code is NAICS 2211. A facility filing more than one industry code is counted under the first one on its record.
Utilities (NAICS 2211) in Arizona, other years
Other industries in Arizona, 2026
- Pipeline transportation (NAICS 4862) 10
- Computer and electronic product manufacturing (NAICS 3344) 7
- Mining and quarrying (NAICS 2122) 7
- Nonmetallic mineral product manufacturing (NAICS 3273) 5
- Merchant wholesalers, nondurable goods (NAICS 4247) 3
- Primary metal manufacturing (NAICS 3311) 3
Air-emissions stack tests recorded in Arizona, 2026
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2026-08-13 | APS REDHAWK GENERATING FACILITY | MARICOPA COUNTY, Maricopa, AZ | Pending | Local |
| 2026-08-13 | ARLINGTON VALLEY — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pending | Local |
| 2026-08-07 | APS WEST PHX POWER PLANT | MARICOPA COUNTY, Maricopa, AZ | Pending | Local |
| 2026-07-29 | VALENCIA POWER PLANT | NOGALES, Santa Cruz, AZ | Pass | State |
| 2026-07-21 | MESQUITE GENERATING STATION | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2026-07-15 | APS WEST PHX POWER PLANT | MARICOPA COUNTY, Maricopa, AZ | Pending | Local |
| 2026-07-07 | GILA RIVER POWER STATION — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pending | Local |
| 2026-06-09 | CORONADO GENERATING PLANT | SAINT JOHNS, Apache, AZ | Pass | State |
| 2026-06-09 | APACHE GENERATING STATION | COCHISE, Cochise, AZ | Pass | State |
| 2026-05-27 | SALT RIVER PROJECT - KYRENE GENERATING STATION — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pending | Local |
| 2026-05-16 | SALT RIVER PROJECT - SANTAN GENERATING STATION | MARICOPA COUNTY, Maricopa, AZ | Pending | Local |
| 2026-05-14 | APS OCOTILLO POWER PLANT | MARICOPA COUNTY, Maricopa, AZ | Pending | Local |
| 2026-05-08 | MESQUITE GENERATING STATION | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2026-05-06 | NEW HARQUAHALA GENERATING | MARICOPA COUNTY, Maricopa, AZ | Pending | Local |
| 2026-04-25 | SALT RIVER PROJECT - AGUA FRIA GENERATING STATION | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2026-04-02 | SALT RIVER PROJECT - SANTAN GENERATING STATION | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2026-04-01 | APS WEST PHX POWER PLANT | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2026-03-04 | VALENCIA POWER PLANT | NOGALES, Santa Cruz, AZ | Pass | State |
| 2026-02-19 | APACHE GENERATING STATION | COCHISE, Cochise, AZ | Pass | State |
| 2026-02-04 | TUCSON ELECTRIC POWER - SPRINGERVILLE GENERATING STATION | SPRINGERVILLE, Apache, AZ | Pass | State |
| 2026-02-03 | TUCSON ELECTRIC POWER - SPRINGERVILLE GENERATING STATION | SPRINGERVILLE, Apache, AZ | Pass | State |
| 2026-02-02 | TUCSON ELECTRIC POWER - SPRINGERVILLE GENERATING STATION | SPRINGERVILLE, Apache, AZ | Pass | State |
| 2026-01-30 | TUCSON ELECTRIC POWER - SPRINGERVILLE GENERATING STATION | SPRINGERVILLE, Apache, AZ | Pass | State |
| 2026-01-29 | APACHE GENERATING STATION | COCHISE, Cochise, 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.