EPA Air · stack tests by county and year
Air-emissions stack tests in Pueblo County, Colorado, 2025
- 16Stack 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 Pueblo County, Colorado 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 Pueblo County facility page.
Pueblo County, Colorado, 2025
Air-emissions stack tests in Pueblo County, other years
Air-emissions stack tests recorded in Pueblo County, Colorado, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-09-18 | BLACK HILLS ELECTRIC GENERATION - PAGS | Pass | State |
| 2025-09-17 | BLACK HILLS ELECTRIC GENERATION - PAGS | Pass | State |
| 2025-09-17 | BLACK HILLS ELECTRIC GENERATION - PAGS | Pass | State |
| 2025-09-16 | BLACK HILLS ELECTRIC GENERATION - PAGS | Pass | State |
| 2025-09-16 | BLACK HILLS ELECTRIC GENERATION - PAGS | Pass | State |
| 2025-06-05 | BLACK HILLS ELECTRIC GENERATION - PAGS | Pass | State |
| 2025-06-05 | BLACK HILLS ELECTRIC GENERATION - PAGS | Pass | State |
| 2025-06-04 | BLACK HILLS ELECTRIC GENERATION - PAGS | Pass | State |
| 2025-06-04 | BLACK HILLS ELECTRIC GENERATION - PAGS | Pass | State |
| 2025-06-02 | BLACK HILLS ELECTRIC GENERATION - PAGS | Pass | State |
| 2025-05-07 | PUBLIC SERVICE CO - COMANCHE PLT — high-priority violation on file | Pass | State |
| 2025-05-07 | PUBLIC SERVICE CO - COMANCHE PLT — high-priority violation on file | Pass | State |
| 2025-04-23 | CF & I STEEL L.P. DBA EVRAZ ROCKY MTN ST — high-priority violation on file | Pass | State |
| 2025-04-22 | CF & I STEEL L.P. DBA EVRAZ ROCKY MTN ST — high-priority violation on file | Pass | State |
| 2025-04-11 | GCC RIO GRANDE - PUEBLO CEMENT PLANT — high-priority violation on file | Pass | State |
| 2025-04-10 | GCC RIO GRANDE - PUEBLO CEMENT PLANT — high-priority violation on file | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.