EPA Air · stack tests by county and year
Air-emissions stack tests in Pima County, Arizona, 2025
- 3Stack 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 Pima 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 Pima County facility page.
Pima County, Arizona, 2025
Air-emissions stack tests in Pima County, other years
Air-emissions stack tests recorded in Pima County, Arizona, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-12-18 | CALPORTLAND - RILLITO CEMENT PLANT | Pass | State |
| 2025-06-20 | CALPORTLAND - RILLITO CEMENT PLANT | Pass | State |
| 2025-01-16 | CALPORTLAND - RILLITO CEMENT PLANT | Pass | State |
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 Pima county, AZ, for 2025. Stack tests recorded in 2025: 3.