EPA Air · stack tests by state, industry and year
Utilities (NAICS 2211): stack tests in Colorado, 2026
- 21Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row is one stack test recorded during 2026 at a Colorado source whose primary industry code is NAICS 2211. A facility filing more than one industry code is counted under the first one on its record.
Utilities (NAICS 2211) in Colorado, other years
Other industries in Colorado, 2026
- Oil and gas extraction (NAICS 2111) 110
- Nonmetallic mineral product manufacturing (NAICS 3273) 12
- National security and international affairs (NAICS 9281) 10
- Nonmetallic mineral product manufacturing (NAICS 3271) 7
- Nonmetallic mineral product manufacturing (NAICS 3274) 6
- Waste management and remediation (NAICS 5622) 3
Air-emissions stack tests recorded in Colorado, 2026
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2026-08-06 | BLACK HILLS ELECTRIC GENERATION - PAGS | PUEBLO, Pueblo, CO | Pass | State |
| 2026-07-24 | PLATTE RIVER POWER AUTHORITY - RAWHIDE | WELLINGTON 9.3 MI. N OF, Larimer, CO | Pass | State |
| 2026-07-23 | PLATTE RIVER POWER AUTHORITY - RAWHIDE | WELLINGTON 9.3 MI. N OF, Larimer, CO | Pass | State |
| 2026-07-14 | PUBLIC SERVICE CO - HAYDEN PLT | HAYDEN, Routt, CO | Pass | State |
| 2026-07-14 | PUBLIC SERVICE CO - HAYDEN PLT | HAYDEN, Routt, CO | Pass | State |
| 2026-06-18 | PUBLIC SERVICE CO - CHEROKEE PLT | COMMERCE CITY AREA, Adams, CO | Pass | State |
| 2026-06-18 | TRI STATE GENERATION & TRANS - CRAIG | CRAIG 2.9 MI. SW OF, Moffat, CO | Pending | State |
| 2026-06-11 | BLACK HILLS ELECTRIC GENERATION - PAGS | PUEBLO, Pueblo, CO | Pass | State |
| 2026-06-10 | BLACK HILLS ELECTRIC GENERATION - PAGS | PUEBLO, Pueblo, CO | Pass | State |
| 2026-06-09 | BLACK HILLS ELECTRIC GENERATION - PAGS | PUEBLO, Pueblo, CO | Pass | State |
| 2026-06-09 | BLACK HILLS ELECTRIC GENERATION - PAGS | PUEBLO, Pueblo, CO | Pass | State |
| 2026-06-08 | BLACK HILLS ELECTRIC GENERATION - PAGS | PUEBLO, Pueblo, CO | Pass | State |
| 2026-05-01 | PLAINS END, LLC | ARVADA, Jefferson, CO | Pass | State |
| 2026-04-30 | PLAINS END, LLC | ARVADA, Jefferson, CO | Pass | State |
| 2026-04-29 | PUBLIC SERVICE CO - CHEROKEE PLT | COMMERCE CITY AREA, Adams, CO | Pass | State |
| 2026-04-29 | PLAINS END, LLC | ARVADA, Jefferson, CO | Pass | State |
| 2026-04-28 | PLAINS END, LLC | ARVADA, Jefferson, CO | Pass | State |
| 2026-04-27 | PLAINS END, LLC | ARVADA, Jefferson, CO | Pass | State |
| 2026-04-27 | PUBLIC SERVICE CO - HAYDEN PLT | HAYDEN, Routt, CO | Pass | State |
| 2026-04-14 | BLACK HILLS ELECTRIC GENERATION - PAGS | PUEBLO, Pueblo, CO | Pass | State |
| 2026-03-31 | PUBLIC SERVICE CO - PAWNEE PLT — high-priority violation on file | BRUSH 2.6 MI. N OF, Morgan, CO | Pass | State |
Primary NAICS code as filed on the facility record; dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.