EPA Air · stack tests by county and year
Air-emissions stack tests in Millard County, Utah, 2025
- 11Stack 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 Millard County, Utah 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 Millard County facility page.
Air-emissions stack tests in Millard County, other years
Air-emissions stack tests recorded in Millard County, Utah, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-11-20 | INTERMOUNTAIN POWER SERVICE CORPORATION | Pass | State |
| 2025-10-22 | INTERMOUNTAIN POWER SERVICE CORPORATION | Pass | State |
| 2025-09-26 | INTERMOUNTAIN POWER SERVICE CORPORATION | Pass | State |
| 2025-09-11 | INTERMOUNTAIN POWER SERVICE CORPORATION | Pass | State |
| 2025-08-28 | INTERMOUNTAIN POWER SERVICE CORPORATION | Pass | State |
| 2025-08-14 | GRAYMONT WESTERN (CONTINENTAL LIME) | Pass | State |
| 2025-08-13 | GRAYMONT WESTERN (CONTINENTAL LIME) | Pass | State |
| 2025-08-13 | GRAYMONT WESTERN (CONTINENTAL LIME) | Pass | State |
| 2025-05-21 | GRAYMONT WESTERN (CONTINENTAL LIME) | Pass | State |
| 2025-05-21 | GRAYMONT WESTERN (CONTINENTAL LIME) | Pass | State |
| 2025-05-20 | GRAYMONT WESTERN (CONTINENTAL LIME) | 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 Millard county, UT, in 2025. Stack tests recorded in 2025: 11.