EPA Air · stack tests by county and year
Air-emissions stack tests in Laramie County, Wyoming, 2026
- 19Stack 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 Laramie County, Wyoming during 2026. 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 Laramie County facility page.
Laramie County, Wyoming, 2026
Air-emissions stack tests in Laramie County, other years
Air-emissions stack tests recorded in Laramie County, Wyoming, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-05-19 | CHEYENNE PLANT (DYNO NOBEL INC) — high-priority violation on file | Pass | State |
| 2026-05-19 | CHEYENNE PLANT (DYNO NOBEL INC) — high-priority violation on file | Pass | State |
| 2026-05-19 | CHEYENNE PLANT (DYNO NOBEL INC) — high-priority violation on file | Pass | State |
| 2026-05-19 | CHEYENNE PLANT (DYNO NOBEL INC) — high-priority violation on file | Pass | State |
| 2026-05-19 | CHEYENNE PLANT (DYNO NOBEL INC) — high-priority violation on file | Pass | State |
| 2026-05-19 | CHEYENNE PLANT (DYNO NOBEL INC) — high-priority violation on file | Pass | State |
| 2026-05-19 | CHEYENNE PLANT (DYNO NOBEL INC) — high-priority violation on file | Pass | State |
| 2026-05-19 | CHEYENNE PLANT (DYNO NOBEL INC) — high-priority violation on file | Pass | State |
| 2026-04-09 | CHEYENNE PRAIRIE GENERATING STATION (CHEYENNE LIGHT FUEL & POWER) | Pass | State |
| 2026-04-09 | CHEYENNE PRAIRIE GENERATING STATION (CHEYENNE LIGHT FUEL & POWER) | Pass | State |
| 2026-04-09 | CHEYENNE PRAIRIE GENERATING STATION (CHEYENNE LIGHT FUEL & POWER) | Pass | State |
| 2026-03-17 | CHEYENNE RENEWABLE DIESEL COMPANY (CHEYENNE RENEWABLE DIESEL COMPANY LLC) | Pass | State |
| 2026-03-17 | CHEYENNE RENEWABLE DIESEL COMPANY (CHEYENNE RENEWABLE DIESEL COMPANY LLC) | Pass | State |
| 2026-03-17 | CHEYENNE RENEWABLE DIESEL COMPANY (CHEYENNE RENEWABLE DIESEL COMPANY LLC) | Pass | State |
| 2026-03-17 | CHEYENNE RENEWABLE DIESEL COMPANY (CHEYENNE RENEWABLE DIESEL COMPANY LLC) | Pass | State |
| 2026-03-17 | CHEYENNE RENEWABLE DIESEL COMPANY (CHEYENNE RENEWABLE DIESEL COMPANY LLC) | Pass | State |
| 2026-03-17 | CHEYENNE RENEWABLE DIESEL COMPANY (CHEYENNE RENEWABLE DIESEL COMPANY LLC) | Pass | State |
| 2026-03-17 | CHEYENNE RENEWABLE DIESEL COMPANY (CHEYENNE RENEWABLE DIESEL COMPANY LLC) | Pass | State |
| 2026-03-17 | CHEYENNE RENEWABLE DIESEL COMPANY (CHEYENNE RENEWABLE DIESEL COMPANY LLC) | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.