EPA Air · stack tests by state and year
Air-emissions stack tests in Colorado, 2025
- 405Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Every stack test below was recorded against a source in Colorado during 2025; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in Colorado, 2025
- Weld County 186
- Garfield County 51
- Adams County 35
- Rio Blanco County 30
- Jefferson County 24
- Pueblo County 16
- Arapahoe County 14
- Boulder County 8
- Larimer County 7
- Mesa County 6
- Moffat County 5
- Prowers County 4
- Denver County 3
- Yuma County 3
Colorado, other years
Air-emissions stack tests recorded in Colorado, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-04-09 | TERUMO BCT STERILIZATION SCVS - LAKEWOOD | LAKEWOOD, Jefferson, CO | Pass | State |
| 2025-04-09 | WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file | FORT LUPTON, Weld, CO | Pass | State |
| 2025-04-09 | WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file | FORT LUPTON, Weld, CO | Pass | State |
| 2025-04-09 | DCP OPERATING CO - ENTERPRISE C.S. — high-priority violation on file | KEENESBURG 5.2 MI. N OF, Weld, CO | Pass | State |
| 2025-04-09 | DCP OPERATING CO - ENTERPRISE C.S. — high-priority violation on file | KEENESBURG 5.2 MI. N OF, Weld, CO | Pass | State |
| 2025-04-09 | PLATTE RIVER BIOGAS - 19179 CR 49 | LA SALLE 6.4 MI. SE OF, Weld, CO | Pass | State |
| 2025-04-09 | EXTRACTION - TRIPLE CREEK PRODUCTION | GREELEY, Weld, CO | Pass | State |
| 2025-04-09 | EXTRACTION - TRIPLE CREEK PRODUCTION | GREELEY, Weld, CO | N/A | State |
| 2025-04-08 | WASTE MANAGEMENT - DENVER ARAPAHOE DISPO | AURORA, Arapahoe, CO | Pass | State |
| 2025-04-08 | WASTE MANAGEMENT - DENVER ARAPAHOE DISPO | AURORA, Arapahoe, CO | Pass | State |
| 2025-04-08 | WASTE MANAGEMENT - DENVER ARAPAHOE DISPO | AURORA, Arapahoe, CO | Pass | State |
| 2025-04-08 | WASTE MANAGEMENT - DENVER ARAPAHOE DISPO | AURORA, Arapahoe, CO | Pass | State |
| 2025-04-08 | WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file | FORT LUPTON, Weld, CO | Pass | State |
| 2025-04-08 | EXTRACTION - TRIPLE CREEK PRODUCTION | GREELEY, Weld, CO | Pass | State |
| 2025-04-07 | DCP OPERATING CO - MEWBOURN — high-priority violation on file | GILCREST 2.4 MI. N OF, Weld, CO | Pass | State |
| 2025-04-07 | DCP OPERATING CO - MEWBOURN — high-priority violation on file | GILCREST 2.4 MI. N OF, Weld, CO | Pass | State |
| 2025-04-07 | DCP OPERATING CO - MEWBOURN — high-priority violation on file | GILCREST 2.4 MI. N OF, Weld, CO | Pass | State |
| 2025-04-07 | DCP OPERATING CO - MEWBOURN — high-priority violation on file | GILCREST 2.4 MI. N OF, Weld, CO | Pass | State |
| 2025-04-04 | ROCKIES EXPRESS PIPELINE-CHEYENNE HUB CS | NUNN 14.3 MI. N OF, Weld, CO | Pass | State |
| 2025-04-04 | ROCKIES EXPRESS PIPELINE-CHEYENNE HUB CS | NUNN 14.3 MI. N OF, Weld, CO | Pass | State |
| 2025-04-04 | NOBLE ENERGY-WELLS RANCH AE 30 ECONODE — high-priority violation on file | KERSEY 10.6 MI. NE OF, Weld, CO | Pass | State |
| 2025-04-04 | NOBLE ENERGY - WELLS RANCH AA33 ECONODE | KERSEY 7.5 MI. NE OF, Weld, CO | Pass | State |
| 2025-04-03 | NOBLE ENERGY - WELLS RANCH BB11 ECONODE | KERSEY, Weld, CO | Pass | State |
| 2025-04-02 | QB ENERGY OPERATING - CDP F09 596 | PARACHUTE 13.0 MI. NW OF, Garfield, CO | Pass | State |
| 2025-04-02 | EXTRACTION - ARDREY PRODUCTION FACILITY | EVANS AREA, Weld, CO | Pass | State |
| 2025-04-02 | EXTRACTION - ARDREY PRODUCTION FACILITY | EVANS AREA, Weld, CO | Pass | State |
| 2025-04-01 | WES DJ GAS PROC - WATTENBERG PLANT | AURORA, Adams, CO | Pass | State |
| 2025-04-01 | CRESTONE PEAK - KING 3-65 28-29 | AURORA, Adams, CO | Fail | State |
| 2025-04-01 | CRESTONE PEAK - KING 3-65 28-29 | AURORA, Adams, CO | Fail | State |
| 2025-04-01 | CRESTONE PEAK - KING 3-65 28-29 | AURORA, Adams, CO | Fail | State |
| 2025-04-01 | CRESTONE PEAK - KING 3-65 28-29 | AURORA, Adams, CO | Fail | State |
| 2025-04-01 | CRESTONE PEAK - KING 3-65 28-29 | AURORA, Adams, CO | Fail | State |
| 2025-04-01 | CRESTONE PEAK - KING 3-65 28-29 | AURORA, Adams, CO | Fail | State |
| 2025-04-01 | QB ENERGY OPERATING - CDP J25 496 | PARACHUTE 14.6 MI. N OF, Garfield, CO | Pass | State |
| 2025-03-26 | HIGHPOINT - ANSCHUTZ STATE 5-62-22_23 SW | ORCHARD 10.8 MI. N OF, Weld, CO | Pass | State |
| 2025-03-25 | HIGHPOINT - SIEBRING 5-63-32 SENE PRODUC | KERSEY AREA, Weld, CO | Pass | State |
| 2025-03-19 | COLORADO INTERSTATE GAS CO - CHEYENNE CS — high-priority violation on file | NUNN 14.8 MI. N OF, Weld, CO | Pass | State |
| 2025-03-19 | WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file | FORT LUPTON, Weld, CO | Pass | State |
| 2025-03-18 | NORTHWEST PIPELINE - RANGELY C.S. | RANGELY, Rio Blanco, CO | Pass | State |
| 2025-03-18 | COLORADO INTERSTATE GAS CO - CHEYENNE CS — high-priority violation on file | NUNN 14.8 MI. N OF, Weld, CO | Pass | State |
| 2025-03-18 | WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file | FORT LUPTON, Weld, CO | Pass | State |
| 2025-03-18 | NOBLE ENERGY - HULLABALOO Y16-28-A ECONO | KEENESBURG 2.6 MI. N OF, Weld, CO | Pass | State |
| 2025-03-17 | ROCKIES EXPRESS - LOGAN COUNTY CS | PEETZ AREA, Logan, CO | Pass | State |
| 2025-03-14 | WES DJ GAS PROC - WATTENBERG PLANT | AURORA, Adams, CO | N/A | State |
| 2025-03-14 | UGC MIDSTREAM - FOUNDATION CREEK CS — high-priority violation on file | RANGELY 27.5 MI. S OF, Rio Blanco, CO | Pass | State |
| 2025-03-13 | WES DJ GAS PROC - WATTENBERG PLANT | AURORA, Adams, CO | Pending | State |
| 2025-03-13 | WEXPRO CO - POWDER WASH | CRAIG 47.7 MI. NW OF, Moffat, CO | Pass | State |
| 2025-03-12 | BARGATH, LLC - HYRUP PROD FACILITY — high-priority violation on file | PARACHUTE 4.3 MI. S OF, Garfield, CO | Pass | State |
| 2025-03-12 | QB ENERGY OPERATING - STORY GULCH C.S. — high-priority violation on file | PARACHUTE 13.8 MI. N OF, Garfield, CO | Pass | State |
| 2025-03-12 | QB ENERGY OPERATING - STORY GULCH C.S. — high-priority violation on file | PARACHUTE 13.8 MI. N OF, Garfield, CO | Pass | State |
| 2025-03-12 | COVALENCE DJ, LLC - BIGFOOT 11 | KERSEY AREA, Weld, CO | Fail | State |
| 2025-03-11 | BARGATH, LLC - HYRUP PROD FACILITY — high-priority violation on file | PARACHUTE 4.3 MI. S OF, Garfield, CO | Pass | State |
| 2025-03-11 | BARGATH, LLC - HYRUP PROD FACILITY — high-priority violation on file | PARACHUTE 4.3 MI. S OF, Garfield, CO | Pass | State |
| 2025-03-11 | QB ENERGY OPERATING - STORY GULCH C.S. — high-priority violation on file | PARACHUTE 13.8 MI. N OF, Garfield, CO | Pass | State |
| 2025-03-11 | QB ENERGY OPERATING - STORY GULCH C.S. — high-priority violation on file | PARACHUTE 13.8 MI. N OF, Garfield, CO | Pass | State |
| 2025-03-11 | QB ENERGY OPERATING - STORY GULCH C.S. — high-priority violation on file | PARACHUTE 13.8 MI. N OF, Garfield, CO | Pass | State |
| 2025-03-10 | QB ENERGY OPERATING - STORY GULCH C.S. — high-priority violation on file | PARACHUTE 13.8 MI. N OF, Garfield, CO | Pass | State |
| 2025-03-10 | QB ENERGY OPERATING - STORY GULCH C.S. — high-priority violation on file | PARACHUTE 13.8 MI. N OF, Garfield, CO | Pass | State |
| 2025-03-07 | ROCKY MOUNTAIN NAT GAS - PICEANCE | MEEKER 17.4 MI. W OF, Rio Blanco, CO | Pass | State |
| 2025-03-07 | PUBLIC SERVICE CO - FORT SAINT VRAIN PLT | MILLIKEN AREA, Weld, CO | Pass | State |
| 2025-03-05 | COLORADO INTERSTATE GAS CO - SPRINGFIELD | LAMAR 20.4 MI. S OF, Prowers, CO | Pass | State |
| 2025-03-05 | COLORADO INTERSTATE GAS CO - SPRINGFIELD | LAMAR 20.4 MI. S OF, Prowers, CO | Pass | State |
| 2025-03-05 | ROCKIES EXPRESS PIPELINE-CHEYENNE HUB CS | NUNN 14.3 MI. N OF, Weld, CO | Pass | State |
| 2025-03-04 | COLORADO INTERSTATE GAS CO - SPRINGFIELD | LAMAR 20.4 MI. S OF, Prowers, CO | Pass | State |
| 2025-03-04 | COLORADO INTERSTATE GAS CO - SPRINGFIELD | LAMAR 20.4 MI. S OF, Prowers, CO | Pass | State |
| 2025-03-04 | ROCKIES EXPRESS PIPELINE-CHEYENNE HUB CS | NUNN 14.3 MI. N OF, Weld, CO | Pass | State |
| 2025-03-04 | ROCKIES EXPRESS PIPELINE-CHEYENNE HUB CS | NUNN 14.3 MI. N OF, Weld, CO | Pass | State |
| 2025-03-03 | ROCKIES EXPRESS PIPELINE-CHEYENNE HUB CS | NUNN 14.3 MI. N OF, Weld, CO | Pass | State |
| 2025-02-28 | ROCKY MOUNTAIN BOTTLE CO - 10619 W 50TH | WHEAT RIDGE, Jefferson, CO | Pass | State |
| 2025-02-26 | BARGATH - RYAN GULCH COMPRESSOR STATION — high-priority violation on file | MEEKER 23.2 MI. W OF, Rio Blanco, CO | Pass | State |
| 2025-02-24 | WES WATTENBURG - CENTRAL OIL STABIL | HUDSON 6.1 MI. N OF, Weld, CO | Pass | State |
| 2025-02-24 | PDC ENERGY - BEEBE 3-34 PAD | GREELEY, Weld, CO | Fail | State |
| 2025-02-24 | PDC ENERGY - BEEBE 3-34 PAD | GREELEY, Weld, CO | Fail | State |
| 2025-02-21 | ANHEUSER-BUSCH, LLC | FORT COLLINS, Larimer, CO | Pass | State |
| 2025-02-21 | BARGATH - RYAN GULCH COMPRESSOR STATION — high-priority violation on file | MEEKER 23.2 MI. W OF, Rio Blanco, CO | Pass | State |
| 2025-02-21 | BONANZA CREEK - WETCO FARMS A-4 PAD | KERSEY 4.8 MI. N OF, Weld, CO | Pass | State |
| 2025-02-21 | PDC ENERGY - BEEBE 3-34 PAD | GREELEY, Weld, CO | Fail | State |
| 2025-02-20 | BARGATH - RYAN GULCH COMPRESSOR STATION — high-priority violation on file | MEEKER 23.2 MI. W OF, Rio Blanco, CO | Pass | State |
| 2025-02-20 | PDC ENERGY - BEEBE 3-34 PAD | GREELEY, Weld, CO | Pass | State |
| 2025-02-19 | BARGATH - RYAN GULCH COMPRESSOR STATION — high-priority violation on file | MEEKER 23.2 MI. W OF, Rio Blanco, CO | Pass | State |
| 2025-02-19 | BARGATH - RYAN GULCH COMPRESSOR STATION — high-priority violation on file | MEEKER 23.2 MI. W OF, Rio Blanco, CO | Pass | State |
| 2025-02-19 | TEP ROCKY MTN - MAUTZ RANCH | RANGELY 22.0 MI. SE OF, Rio Blanco, CO | N/A | State |
| 2025-02-19 | PDC ENERGY - BEEBE 3-34 PAD | GREELEY, Weld, CO | Pass | State |
| 2025-02-18 | BARGATH - RYAN GULCH COMPRESSOR STATION — high-priority violation on file | MEEKER 23.2 MI. W OF, Rio Blanco, CO | Pass | State |
| 2025-02-18 | PDC ENERGY - BEEBE 3-34 PAD | GREELEY, Weld, CO | Pass | State |
| 2025-02-17 | HIGHPOINT - WETCO 4-63-4 SW PRODUCTION | KERSEY 5.2 MI. N OF, Weld, CO | Pass | State |
| 2025-02-14 | PRAIRIE OPERATING CO - SCHLOTTHAUER PROD | FORT COLLINS AREA, Weld, CO | Pass | State |
| 2025-02-13 | UTAH GAS - PARK CANYON WEST C.S. | RANGELY 19.9 MI. SW OF, Rio Blanco, CO | Pass | State |
| 2025-02-07 | ROCKY MOUNTAIN MIDSTREAM - FT LUPTON GAS | FORT LUPTON AREA, Weld, CO | Pass | State |
| 2025-02-06 | KODAK ALARIS - KODAK MOMENTS COLORADO — high-priority violation on file | WINDSOR AREA, Weld, CO | Pass | State |
| 2025-02-06 | WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file | FORT LUPTON, Weld, CO | Pass | State |
| 2025-02-04 | KODAK ALARIS - KODAK MOMENTS COLORADO — high-priority violation on file | WINDSOR AREA, Weld, CO | Pass | State |
| 2025-01-29 | PDC ENERGY - SELTZER LD PAD | TODD CREEK, Adams, CO | Pass | State |
| 2025-01-29 | ANHEUSER-BUSCH, LLC | FORT COLLINS, Larimer, CO | Pass | State |
| 2025-01-29 | TEP ROCKY MTN - RG 41-18-297 WELL PAD | MEEKER 23.2 MI. SW OF, Rio Blanco, CO | Pass | State |
| 2025-01-29 | PDC ENERGY - WILLIAMS PAD | JOHNSTOWN AREA, Weld, CO | Pass | State |
| 2025-01-28 | TEP ROCKY MOUNTAIN - SG 11-22 WELL PAD | BATTLEMENT MESA AREA, Garfield, CO | Pass | State |
| 2025-01-28 | ANHEUSER-BUSCH, LLC | FORT COLLINS, Larimer, CO | N/A | State |
| 2025-01-23 | OWENS-BROCKWAY GLASS - WINDSOR #28 — high-priority violation on file | WINDSOR, Weld, CO | Pass | State |
| 2025-01-22 | ROCKY MOUNTAIN BOTTLE CO - 10619 W 50TH | WHEAT RIDGE, Jefferson, CO | N/A | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.