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.
What this page shows
This page covers Clean Air Act facilities in the EPA air register with stack tests in Maricopa county, AZ, in 2025. It lists 53 stack tests recorded in 2025.