EPA Air · stack tests by county and year
Air-emissions stack tests in Maricopa County, Arizona, 2025
- 53Stack 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 Maricopa County, Arizona during 2025. 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 Maricopa County facility page.
Maricopa County, Arizona, 2025
Air-emissions stack tests in Maricopa County, other years
Air-emissions stack tests recorded in Maricopa County, Arizona, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-12-17 | INTEL CORP - OCOTILLO CAMPUS — high-priority violation on file | Pass | Local |
| 2025-12-12 | INTEL CORP - OCOTILLO CAMPUS — high-priority violation on file | Pass | Local |
| 2025-12-12 | INTEL CORP - OCOTILLO CAMPUS — high-priority violation on file | Pass | Local |
| 2025-12-08 | INTEL CORP - OCOTILLO CAMPUS — high-priority violation on file | Fail | Local |
| 2025-12-05 | QTS GLENDALE I | Pass | Local |
| 2025-12-04 | INTEL CORP - OCOTILLO CAMPUS — high-priority violation on file | Pass | Local |
| 2025-11-14 | NORTHWEST REGIONAL LANDFILL | Pass | Local |
| 2025-10-31 | HENRY PRODUCTS — high-priority violation on file | Fail | Local |
| 2025-10-24 | CMC STEEL FABRICATORS | Pass | Local |
| 2025-10-15 | REAL ALLOY ARIZONA | Pass | Local |
| 2025-10-11 | SOLANA GENERATING STATION | Pass | Local |
| 2025-10-07 | SUMCO SOUTHWEST CORPORATION — high-priority violation on file | Pass | Local |
| 2025-09-23 | MECP1 MESA INTERMEDIATE 1 | Pass | Local |
| 2025-09-23 | SALT RIVER PROJECT - KYRENE GENERATING STATION — high-priority violation on file | Pass | Local |
| 2025-08-21 | ARLINGTON VALLEY — high-priority violation on file | Pass | Local |
| 2025-08-14 | APS REDHAWK GENERATING FACILITY | Pass | Local |
| 2025-08-08 | APS WEST PHX POWER PLANT | Pass | Local |
| 2025-08-01 | NEW WINCUP HOLDINGS — high-priority violation on file | Pass | Local |
| 2025-07-30 | SOLANA GENERATING STATION | Incomplete | Local |
| 2025-07-16 | APS WEST PHX POWER PLANT | Pass | Local |
| 2025-07-15 | INTEL CORP - OCOTILLO CAMPUS — high-priority violation on file | Pass | Local |
| 2025-07-08 | CMC STEEL FABRICATORS | Pass | Local |
| 2025-07-01 | SOLANA GENERATING STATION | Pass | Local |
| 2025-06-29 | SALT RIVER PROJECT - KYRENE GENERATING STATION — high-priority violation on file | Pass | Local |
| 2025-06-26 | NEW HARQUAHALA GENERATING | Pass | Local |
| 2025-06-25 | SALT RIVER PROJECT - SANTAN GENERATING STATION | Pass | Local |
| 2025-06-18 | HYDRO EXTRUSION USA | Pass | Local |
| 2025-06-12 | QUIKJET - MONROE I & II TERMINALS — high-priority violation on file | Pass | Local |
| 2025-06-10 | QUIKJET - MONROE I & II TERMINALS — high-priority violation on file | Pass | Local |
| 2025-06-06 | SALT RIVER PROJECT - AGUA FRIA GENERATING STATION | Pass | Local |
| 2025-06-03 | CALJET | Pass | Local |
| 2025-06-03 | QUIKJET - MONROE I & II TERMINALS — high-priority violation on file | Pass | Local |
| 2025-05-22 | GILA RIVER POWER STATION — high-priority violation on file | Pass | Local |
| 2025-05-16 | APS OCOTILLO POWER PLANT | Pass | Local |
| 2025-05-13 | PHOENIX FACILITY | Pass | Local |
| 2025-05-09 | MESQUITE GENERATING STATION | Pass | Local |
| 2025-04-16 | MICROSOFT CORP - BROADWAY RD | Pass | Local |
| 2025-04-15 | INTEL CORP - OCOTILLO CAMPUS — high-priority violation on file | Pass | Local |
| 2025-04-11 | CMC STEEL FABRICATORS | Pass | Local |
| 2025-04-10 | INTEL CORP CHANDLER CAMPUS (FAB 6) | Pass | Local |
| 2025-02-24 | INTEL CORP - OCOTILLO CAMPUS — high-priority violation on file | Pass | Local |
| 2025-02-04 | SFPP-PHOENIX TERMINAL | Pass | Local |
| 2025-01-31 | CIRCLE K TERMINAL | Pass | Local |
| 2025-01-22 | GOLD BOND BUILDING PRODUCTS — high-priority violation on file | Pass | Local |
| 2025-01-22 | GOLD BOND BUILDING PRODUCTS — high-priority violation on file | Pass | Local |
| 2025-01-22 | GOLD BOND BUILDING PRODUCTS — high-priority violation on file | Pass | Local |
| 2025-01-22 | GOLD BOND BUILDING PRODUCTS — high-priority violation on file | Pass | Local |
| 2025-01-22 | GOLD BOND BUILDING PRODUCTS — high-priority violation on file | Pass | Local |
| 2025-01-22 | GOLD BOND BUILDING PRODUCTS — high-priority violation on file | Pass | Local |
| 2025-01-16 | CMC STEEL FABRICATORS | Pass | Local |
| 2025-01-09 | BALL METAL BEVERAGE CONTAINER CORPORATION — high-priority violation on file | Pass | Local |
| 2025-01-08 | VULCAN MATERIALS — high-priority violation on file | Pass | Local |
| 2025-01-07 | STONE APPLICATIONS | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.