EPA Air · stack tests by state, industry and year
Utilities (NAICS 2211): stack tests in Colorado, 2025
- 34Stack 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 2025 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, 2025
- Oil and gas extraction (NAICS 2111) 286
- Pipeline transportation (NAICS 4862) 17
- Nonmetallic mineral product manufacturing (NAICS 3273) 13
- Waste management and remediation (NAICS 5622) 10
- Fabricated metal product manufacturing (NAICS 3324) 9
- Petroleum and coal products manufacturing (NAICS 3241) 5
- Nonmetallic mineral product manufacturing (NAICS 3272) 5
- Merchant wholesalers, nondurable goods (NAICS 4247) 4
- Food manufacturing (NAICS 3115) 4
- Mining and quarrying (NAICS 2123) 3
- Beverage and tobacco manufacturing (NAICS 3121) 3
Air-emissions stack tests recorded in Colorado, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-10-31 | PLAINS END, LLC | ARVADA, Jefferson, CO | Pass | State |
| 2025-10-30 | PLAINS END, LLC | ARVADA, Jefferson, CO | Pass | State |
| 2025-10-29 | PLAINS END, LLC | ARVADA, Jefferson, CO | Pass | State |
| 2025-10-29 | PUBLIC SERV - ROCKY MOUNTAIN ENERGY | HUDSON AREA, Weld, CO | Pass | State |
| 2025-10-28 | PLAINS END, LLC | ARVADA, Jefferson, CO | Pass | State |
| 2025-10-17 | COLORADO SPRINGS UTILITIES - NIXON PLT | FOUNTAIN AREA, El Paso, CO | Pass | State |
| 2025-09-23 | PLATTE RIVER POWER AUTHORITY - RAWHIDE | WELLINGTON 9.3 MI. N OF, Larimer, CO | Pass | State |
| 2025-09-18 | BLACK HILLS ELECTRIC GENERATION - PAGS | PUEBLO, Pueblo, CO | Pass | State |
| 2025-09-17 | BLACK HILLS ELECTRIC GENERATION - PAGS | PUEBLO, Pueblo, CO | Pass | State |
| 2025-09-17 | BLACK HILLS ELECTRIC GENERATION - PAGS | PUEBLO, Pueblo, CO | Pass | State |
| 2025-09-16 | BLACK HILLS ELECTRIC GENERATION - PAGS | PUEBLO, Pueblo, CO | Pass | State |
| 2025-09-16 | BLACK HILLS ELECTRIC GENERATION - PAGS | PUEBLO, Pueblo, CO | Pass | State |
| 2025-09-04 | PUBLIC SERVICE CO - HAYDEN PLT | HAYDEN, Routt, CO | Pass | State |
| 2025-07-23 | PUBLIC SERV - ROCKY MOUNTAIN ENERGY | HUDSON AREA, Weld, CO | Pass | State |
| 2025-07-22 | PUBLIC SERV - ROCKY MOUNTAIN ENERGY | HUDSON AREA, Weld, CO | Pass | State |
| 2025-07-18 | PLATTE RIVER POWER AUTHORITY - RAWHIDE | WELLINGTON 9.3 MI. N OF, Larimer, CO | N/A | State |
| 2025-07-17 | PLATTE RIVER POWER AUTHORITY - RAWHIDE | WELLINGTON 9.3 MI. N OF, Larimer, CO | N/A | State |
| 2025-06-21 | TRI STATE GENERATION & TRANS - CRAIG | CRAIG 2.9 MI. SW OF, Moffat, CO | Pass | State |
| 2025-06-05 | BLACK HILLS ELECTRIC GENERATION - PAGS | PUEBLO, Pueblo, CO | Pass | State |
| 2025-06-05 | BLACK HILLS ELECTRIC GENERATION - PAGS | PUEBLO, Pueblo, CO | Pass | State |
| 2025-06-04 | BLACK HILLS ELECTRIC GENERATION - PAGS | PUEBLO, Pueblo, CO | Pass | State |
| 2025-06-04 | BLACK HILLS ELECTRIC GENERATION - PAGS | PUEBLO, Pueblo, CO | Pass | State |
| 2025-06-02 | BLACK HILLS ELECTRIC GENERATION - PAGS | PUEBLO, Pueblo, CO | Pass | State |
| 2025-05-07 | PUBLIC SERVICE CO - COMANCHE PLT — high-priority violation on file | PUEBLO, Pueblo, CO | Pass | State |
| 2025-05-07 | PUBLIC SERVICE CO - COMANCHE PLT — high-priority violation on file | PUEBLO, Pueblo, CO | Pass | State |
| 2025-04-25 | PLAINS END, LLC | ARVADA, Jefferson, CO | N/A | State |
| 2025-04-24 | PLAINS END, LLC | ARVADA, Jefferson, CO | N/A | State |
| 2025-04-23 | PLAINS END, LLC | ARVADA, Jefferson, CO | Pass | State |
| 2025-04-22 | PLAINS END, LLC | ARVADA, Jefferson, CO | N/A | State |
| 2025-04-21 | PLAINS END, LLC | ARVADA, Jefferson, CO | N/A | State |
| 2025-04-16 | PUBLIC SERVICE CO - CHEROKEE PLT | COMMERCE CITY AREA, Adams, CO | Pass | State |
| 2025-04-09 | PUBLIC SERVICE CO - CHEROKEE PLT | COMMERCE CITY AREA, Adams, CO | Pass | State |
| 2025-03-07 | PUBLIC SERVICE CO - FORT SAINT VRAIN PLT | MILLIKEN AREA, Weld, CO | Pass | State |
| 2025-01-15 | PUBLIC SERVICE CO STATE PLT | DENVER, Denver, 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.