EPA Air · stack tests by state and year
Air-emissions stack tests in Arizona, 2026
- 71Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Every stack test below was recorded against a source in Arizona during 2026; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in Arizona, 2026
Arizona, other years
Air-emissions stack tests recorded in Arizona, 2026
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2026-08-19 | HENRY PRODUCTS — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pending | Local |
| 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 | APACHE NITROGEN PRODUCTS INC — high-priority violation on file | SAINT DAVID, Cochise, 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 |
| 2026-07-14 | CMC STEEL FABRICATORS | MARICOPA COUNTY, Maricopa, AZ | Pending | Local |
| 2026-07-09 | INTEL CORP - OCOTILLO CAMPUS — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pending | Local |
| 2026-07-07 | GILA RIVER POWER STATION — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pending | Local |
| 2026-06-30 | INTEL CORP - OCOTILLO CAMPUS — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pending | Local |
| 2026-06-13 | DRAKE CEMENT- DRAKE ROAD SITE — high-priority violation on file | PAULDEN, Yavapai, AZ | Pass | State |
| 2026-06-10 | DESERT CONSTRUCTION - PLANT #2 | KINGMAN, Mohave, AZ | Pass | State |
| 2026-06-09 | CORONADO GENERATING PLANT | SAINT JOHNS, Apache, AZ | Pass | State |
| 2026-06-09 | APACHE GENERATING STATION | COCHISE, Cochise, AZ | Pass | State |
| 2026-06-06 | FREEPORT MCMORAN - MIAMI SMELTER | MIAMI, Gila, AZ | Pass | State |
| 2026-06-03 | GOLD ROAD MINE | OATMAN, Mohave, AZ | Pass | State |
| 2026-05-27 | QUIKJET - MONROE I & II TERMINALS — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pending | Local |
| 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 |
| 2026-05-13 | LHOIST NORTH AMERCA OF ARIZONA - NELSON | ARIZONA, Undetermined, AZ | Pass | State |
| 2026-05-11 | FREEPORT-MCMORAN - MORENCI | MORENCI, Greenlee, AZ | Pass | State |
| 2026-05-08 | MESQUITE GENERATING STATION | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2026-05-07 | TSMC PHOENIX PROJECT | MARICOPA COUNTY, Maricopa, AZ | Pending | Local |
| 2026-05-06 | NEW HARQUAHALA GENERATING | MARICOPA COUNTY, Maricopa, AZ | Pending | Local |
| 2026-04-30 | LINDE GAS & EQUIPMENT, INC. | KINGMAN, Mohave, AZ | Pass | State |
| 2026-04-27 | TSMC PHOENIX PROJECT | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2026-04-25 | SALT RIVER PROJECT - AGUA FRIA GENERATING STATION | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2026-04-24 | FREEPORT MCMORAN - MIAMI SMELTER | MIAMI, Gila, AZ | Pass | State |
| 2026-04-22 | TSMC PHOENIX PROJECT | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2026-04-21 | CMC STEEL FABRICATORS | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2026-04-16 | BALL METAL BEVERAGE CONTAINER CORPORATION — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2026-04-16 | BALL METAL BEVERAGE CONTAINER CORPORATION — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pending | Local |
| 2026-04-02 | FREEPORT-MCMORAN - MORENCI | MORENCI, Greenlee, AZ | Pass | State |
| 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 |
| 2026-03-26 | CALPORTLAND - RILLITO CEMENT PLANT | MARANA, Pima, AZ | Pass | State |
| 2026-03-26 | BAGDAD MINE | BAGDAD, Yavapai, AZ | Pass | State |
| 2026-03-25 | EL PASO NATURAL GAS CO - ALAMO LAKE COMPRESSOR STATION | ALAMO CROSSING (HISTORICAL), La Paz, AZ | Pass | State |
| 2026-03-24 | EL PASO NATURAL GAS CO - DUTCH FLAT COMPRESSOR STATION | FRANCONIA, Mohave, AZ | Pass | State |
| 2026-03-18 | EL PASO NATURAL GAS CO - SELIGMAN COMPRESSOR STATION | SELIGMAN, Yavapai, AZ | Pass | State |
| 2026-03-17 | EL PASO NATURAL GAS CO - WILLIAMS COMPRESSOR STATION | WILLIAMS, Coconino, AZ | Pass | State |
| 2026-03-11 | FREEPORT-MCMORAN - SAFFORD OPERATIONS | SAFFORD, Graham, AZ | Pass | State |
| 2026-03-11 | EL PASO NATURAL GAS CO - MOJAVE TOPOCK COMPRESSOR STATION | TOPOCK, Mohave, AZ | Pass | State |
| 2026-03-10 | EL PASO NATURAL GAS CO - WENDEN COMPRESSOR STATION | CENTENNIAL, La Paz, AZ | Pass | State |
| 2026-03-06 | TRANSWESTERN PIPELINE - KINGMAN COMPRESSOR STATION | FORT ROCK ROAD, Mohave, AZ | Pass | State |
| 2026-03-04 | EL PASO NATURAL GAS - WILLCOX COMPRESSOR STATION | WILLCOX, Cochise, AZ | Pass | State |
| 2026-03-04 | TRANSWESTERN PIPELINE - FLAGSTAFF COMPRESSOR STATION | PARKS, Coconino, AZ | Pass | State |
| 2026-03-04 | FREEPORT-MCMORAN - MORENCI | MORENCI, Greenlee, AZ | Pass | State |
| 2026-03-04 | VALENCIA POWER PLANT | NOGALES, Santa Cruz, AZ | Pass | State |
| 2026-03-04 | SAND PIT | LAKE HAVASU CITY, Mohave, AZ | Pass | State |
| 2026-03-03 | EL PASO NATURAL GAS - WILLCOX COMPRESSOR STATION | WILLCOX, Cochise, AZ | Pass | State |
| 2026-02-26 | APACHE NITROGEN PRODUCTS INC — high-priority violation on file | SAINT DAVID, Cochise, AZ | Pass | State |
| 2026-02-26 | PHOENIX CEMENT | CLARKDALE, Yavapai, AZ | Pass | State |
| 2026-02-19 | APACHE GENERATING STATION | COCHISE, Cochise, AZ | Pass | State |
| 2026-02-06 | INTEL CORP - OCOTILLO CAMPUS — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2026-02-04 | TUCSON ELECTRIC POWER - SPRINGERVILLE GENERATING STATION | SPRINGERVILLE, Apache, AZ | Pass | State |
| 2026-02-04 | CIRCLE K TERMINAL | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2026-02-03 | TUCSON ELECTRIC POWER - SPRINGERVILLE GENERATING STATION | SPRINGERVILLE, Apache, AZ | Pass | State |
| 2026-02-03 | SFPP-PHOENIX TERMINAL | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 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 |
| 2026-01-30 | DRAKE CEMENT- DRAKE ROAD SITE — high-priority violation on file | PAULDEN, Yavapai, AZ | Pass | State |
| 2026-01-29 | APACHE GENERATING STATION | COCHISE, Cochise, AZ | Pass | State |
| 2026-01-28 | VULCAN MATERIALS — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2026-01-22 | CMC STEEL FABRICATORS | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2026-01-14 | ROGERS CORPORATION - ROOSEVELT AVE FACILITY — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2026-01-12 | MINERAL PARK MINE | GOLDEN VALLEY, Mohave, AZ | Pass | State |
| 2026-01-06 | DRAKE CEMENT- DRAKE ROAD SITE — high-priority violation on file | PAULDEN, Yavapai, AZ | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.