Velarion Records

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EPA Air · stack tests by state, industry and year

Utilities (NAICS 2211): stack tests in Arizona, 2026

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

Air-emissions stack tests recorded in Arizona, 2026

DateFacilityWhereKindAgency
2026-08-13APS REDHAWK GENERATING FACILITYMARICOPA COUNTY, Maricopa, AZPendingLocal
2026-08-13ARLINGTON VALLEY — high-priority violation on fileMARICOPA COUNTY, Maricopa, AZPendingLocal
2026-08-07APS WEST PHX POWER PLANTMARICOPA COUNTY, Maricopa, AZPendingLocal
2026-07-29VALENCIA POWER PLANTNOGALES, Santa Cruz, AZPassState
2026-07-21MESQUITE GENERATING STATIONMARICOPA COUNTY, Maricopa, AZPassLocal
2026-07-15APS WEST PHX POWER PLANTMARICOPA COUNTY, Maricopa, AZPendingLocal
2026-07-07GILA RIVER POWER STATION — high-priority violation on fileMARICOPA COUNTY, Maricopa, AZPendingLocal
2026-06-09CORONADO GENERATING PLANTSAINT JOHNS, Apache, AZPassState
2026-06-09APACHE GENERATING STATIONCOCHISE, Cochise, AZPassState
2026-05-27SALT RIVER PROJECT - KYRENE GENERATING STATION — high-priority violation on fileMARICOPA COUNTY, Maricopa, AZPendingLocal
2026-05-16SALT RIVER PROJECT - SANTAN GENERATING STATIONMARICOPA COUNTY, Maricopa, AZPendingLocal
2026-05-14APS OCOTILLO POWER PLANTMARICOPA COUNTY, Maricopa, AZPendingLocal
2026-05-08MESQUITE GENERATING STATIONMARICOPA COUNTY, Maricopa, AZPassLocal
2026-05-06NEW HARQUAHALA GENERATINGMARICOPA COUNTY, Maricopa, AZPendingLocal
2026-04-25SALT RIVER PROJECT - AGUA FRIA GENERATING STATIONMARICOPA COUNTY, Maricopa, AZPassLocal
2026-04-02SALT RIVER PROJECT - SANTAN GENERATING STATIONMARICOPA COUNTY, Maricopa, AZPassLocal
2026-04-01APS WEST PHX POWER PLANTMARICOPA COUNTY, Maricopa, AZPassLocal
2026-03-04VALENCIA POWER PLANTNOGALES, Santa Cruz, AZPassState
2026-02-19APACHE GENERATING STATIONCOCHISE, Cochise, AZPassState
2026-02-04TUCSON ELECTRIC POWER - SPRINGERVILLE GENERATING STATIONSPRINGERVILLE, Apache, AZPassState
2026-02-03TUCSON ELECTRIC POWER - SPRINGERVILLE GENERATING STATIONSPRINGERVILLE, Apache, AZPassState
2026-02-02TUCSON ELECTRIC POWER - SPRINGERVILLE GENERATING STATIONSPRINGERVILLE, Apache, AZPassState
2026-01-30TUCSON ELECTRIC POWER - SPRINGERVILLE GENERATING STATIONSPRINGERVILLE, Apache, AZPassState
2026-01-29APACHE GENERATING STATIONCOCHISE, Cochise, AZPassState

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.