EPA Air · stack tests by county and year
Air-emissions stack tests in Arapahoe County, Colorado, 2025
- 14Stack 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 Arapahoe 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 Arapahoe County facility page.
Arapahoe County, Colorado, 2025
Air-emissions stack tests in Arapahoe County, other years
Air-emissions stack tests recorded in Arapahoe County, Colorado, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-11-11 | CRESTONE PEAK - GRANDE 4-65 20-19 NORTH | Pass | State |
| 2025-11-11 | CRESTONE PEAK - GRANDE 4-65 20-19 NORTH | Pass | State |
| 2025-08-18 | CRESTONE PEAK - ARKANSAS 4-64 3-2 | Pass | State |
| 2025-08-06 | CRESTONE - STATE BIERSTADT 4-65 35-34 NO | Pass | State |
| 2025-08-06 | CRESTONE - STATE BIERSTADT 4-65 35-34 NO | Pass | State |
| 2025-08-05 | CRESTONE PEAK - RUSH 4-65 29-30 SOUTH | Pass | State |
| 2025-08-05 | CRESTONE PEAK - RUSH 4-65 29-30 SOUTH | Pass | State |
| 2025-07-16 | CRESTONE PEAK RESOURCES - RUSH 4-65 29-3 | Pass | State |
| 2025-07-16 | CRESTONE PEAK RESOURCES - RUSH 4-65 29-3 | Pass | State |
| 2025-04-18 | CRESTONE - STATE BIERSTADT 4-65 35-34 NO | Pass | State |
| 2025-04-08 | WASTE MANAGEMENT - DENVER ARAPAHOE DISPO | Pass | State |
| 2025-04-08 | WASTE MANAGEMENT - DENVER ARAPAHOE DISPO | Pass | State |
| 2025-04-08 | WASTE MANAGEMENT - DENVER ARAPAHOE DISPO | Pass | State |
| 2025-04-08 | WASTE MANAGEMENT - DENVER ARAPAHOE DISPO | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.