EPA Air · stack tests by state, industry and year
Utilities (NAICS 2211): stack tests in Arizona, 2025
- 34Stack 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 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, 2025
- 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 3314) 5
- 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 |
|---|---|---|---|---|
| 2025-12-17 | APACHE GENERATING STATION | COCHISE, Cochise, AZ | Pass | State |
| 2025-10-11 | SOLANA GENERATING STATION | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2025-09-23 | SALT RIVER PROJECT - KYRENE GENERATING STATION — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2025-09-16 | APACHE GENERATING STATION | COCHISE, Cochise, AZ | Pass | State |
| 2025-09-12 | CORONADO GENERATING PLANT | SAINT JOHNS, Apache, AZ | Pass | State |
| 2025-09-10 | NOVO BIOPOWER, LLC | SNOWFLAKE, Navajo, AZ | Pass | State |
| 2025-08-27 | APACHE GENERATING STATION | COCHISE, Cochise, AZ | Pass | State |
| 2025-08-21 | ARLINGTON VALLEY — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2025-08-14 | APS REDHAWK GENERATING FACILITY | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2025-08-08 | APS WEST PHX POWER PLANT | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2025-07-30 | SOLANA GENERATING STATION | MARICOPA COUNTY, Maricopa, AZ | Incomplete | Local |
| 2025-07-16 | APS WEST PHX POWER PLANT | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2025-07-01 | SOLANA GENERATING STATION | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2025-06-29 | SALT RIVER PROJECT - KYRENE GENERATING STATION — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2025-06-27 | TUCSON ELECTRIC POWER - SPRINGERVILLE GENERATING STATION | SPRINGERVILLE, Apache, AZ | Pass | State |
| 2025-06-26 | NEW HARQUAHALA GENERATING | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2025-06-25 | UNS ELECTRIC INC - BLACK MOUNTAIN GENERATING STATION | GRIFFITH, Mohave, AZ | Pass | State |
| 2025-06-25 | APS - YUCCA POWER PLANT | YUMA, Yuma, AZ | Pass | State |
| 2025-06-25 | SALT RIVER PROJECT - SANTAN GENERATING STATION | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2025-06-17 | GRIFFITH POWER PLANT | GRIFFITH, Mohave, AZ | Pass | State |
| 2025-06-16 | TUCSON ELECTRIC POWER - SPRINGERVILLE GENERATING STATION | SPRINGERVILLE, Apache, AZ | Pass | State |
| 2025-06-11 | TUCSON ELECTRIC POWER - SPRINGERVILLE GENERATING STATION | SPRINGERVILLE, Apache, AZ | Pass | State |
| 2025-06-07 | TUCSON ELECTRIC POWER - SPRINGERVILLE GENERATING STATION | SPRINGERVILLE, Apache, AZ | Pass | State |
| 2025-06-06 | SALT RIVER PROJECT - AGUA FRIA GENERATING STATION | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2025-06-04 | NOVO BIOPOWER, LLC | SNOWFLAKE, Navajo, AZ | Pass | State |
| 2025-06-03 | APACHE GENERATING STATION | COCHISE, Cochise, AZ | Pass | State |
| 2025-05-22 | GILA RIVER POWER STATION — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2025-05-16 | APS OCOTILLO POWER PLANT | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2025-05-09 | MESQUITE GENERATING STATION | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2025-05-01 | VALENCIA POWER PLANT | NOGALES, Santa Cruz, AZ | Pass | State |
| 2025-03-26 | APACHE GENERATING STATION | COCHISE, Cochise, AZ | Pass | State |
| 2025-03-04 | CORONADO GENERATING PLANT | SAINT JOHNS, Apache, AZ | Pass | State |
| 2025-01-29 | CHOLLA GENERATING STATION | JOSEPH CITY, Navajo, AZ | Pass | State |
| 2025-01-09 | YUMA COGENERATION ASSOCIATES | YUMA, Yuma, 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.