EPA Air · stack tests by county and year
Air-emissions stack tests in Arapahoe County, Colorado, 2026
- 12Stack 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 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 Arapahoe County facility page.
Arapahoe County, Colorado, 2026
- Inspections 15
Air-emissions stack tests in Arapahoe County, other years
Air-emissions stack tests recorded in Arapahoe County, Colorado, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-07-16 | NRO - AEROSPACE DATA FACIITY (ADF-C) | Pass | State |
| 2026-07-15 | NRO - AEROSPACE DATA FACIITY (ADF-C) | Pass | State |
| 2026-07-15 | NRO - AEROSPACE DATA FACIITY (ADF-C) | Pass | State |
| 2026-07-14 | NRO - AEROSPACE DATA FACIITY (ADF-C) | Pass | State |
| 2026-07-14 | NRO - AEROSPACE DATA FACIITY (ADF-C) | Pass | State |
| 2026-07-13 | NRO - AEROSPACE DATA FACIITY (ADF-C) | Pass | State |
| 2026-07-13 | NRO - AEROSPACE DATA FACIITY (ADF-C) | Pass | State |
| 2026-07-10 | NRO - AEROSPACE DATA FACIITY (ADF-C) | Pass | State |
| 2026-07-09 | NRO - AEROSPACE DATA FACIITY (ADF-C) | Pass | State |
| 2026-07-08 | NRO - AEROSPACE DATA FACIITY (ADF-C) | Pass | State |
| 2026-01-07 | CRESTONE PEAK - ESTRN HILLS 4-65 17-18 S | Pass | State |
| 2026-01-07 | CRESTONE PEAK - ESTRN HILLS 4-65 17-18 S | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.