EPA Air · stack tests by county and year
Air-emissions stack tests in Canyon County, Idaho, 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 Canyon County, Idaho 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 Canyon County facility page.
Canyon County, Idaho, 2025
- Inspections 23
Air-emissions stack tests in Canyon County, other years
What stands out
- Stack tests in Canyon County, Idaho, held at 3 in both 2024, the previous year on file, and 2025.
- The county’s file for stack tests holds 8 years of events, from 2017 through 2025.
- Its 3 stack tests rank 8th of the 8 county cells in Idaho for 2025.
- Its 3 stack tests are 2.7% of the 111 the state’s file holds for 2025.
Every line is computed by formula from the state’s stored file; nothing is estimated.
Air-emissions stack tests recorded in Canyon County, Idaho, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-02-27 | J R SIMPLOT - CALDWELL (NEW) | Pass | State |
| 2025-02-26 | J R SIMPLOT - CALDWELL (NEW) | Pass | State |
| 2025-01-09 | RIVER ROCK SAND & GRAVEL LLC 00162 | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.
What this page shows
The page covers Clean Air Act facilities in the EPA air register with stack tests in Canyon county, ID, for 2025. Stack tests recorded in 2025: 3.