EPA Air · stack tests by state and year
Air-emissions stack tests in Colorado, 2024
- 400Stack 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 2024; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in Colorado, 2024
- Weld County 170
- Garfield County 53
- Jefferson County 45
- Adams County 20
- Arapahoe County 15
- Rio Blanco County 15
- Pueblo County 14
- Boulder County 10
- Jackson County 10
- Cheyenne County 9
- Mesa County 7
- Denver County 4
- Fremont County 4
- Routt County 4
- Larimer County 3
- El Paso County 3
- Moffat County 3
Colorado, other years
Air-emissions stack tests recorded in Colorado, 2024
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2024-12-17 | HIGHPOINT - 70 RANCH 4-63-3 PAD 2 | KERSEY 6.0 MI. SE OF, Weld, CO | Pass | State |
| 2024-12-16 | MOLSON COORS USA LLC - GOLDEN BREWERY — high-priority violation on file | GOLDEN AREA, Jefferson, CO | Pass | State |
| 2024-12-12 | NORTHWEST PIPELINE - PLEASANT VIEW C.S. | DOLORES 13.1 MI. NW OF, Montezuma, CO | Pass | State |
| 2024-12-12 | NORTHWEST PIPELINE - PLEASANT VIEW C.S. | DOLORES 13.1 MI. NW OF, Montezuma, CO | Pass | State |
| 2024-12-12 | PUBLIC SERVICE CO - HAYDEN PLT | HAYDEN, Routt, CO | Pass | State |
| 2024-12-11 | WASTE MANAGEMENT - DENVER ARAPAHOE DISPO | AURORA, Arapahoe, CO | Pass | State |
| 2024-12-10 | DCP OPERATING CO - ROGGEN NGPP — high-priority violation on file | KEENESBURG 4.4 MI. E OF, Weld, CO | Pass | State |
| 2024-12-05 | CRESTONE PEAK - MUSTANG BOOSTER STATION — high-priority violation on file | AURORA, Adams, CO | Pass | State |
| 2024-12-05 | CRESTONE PEAK - GRANDE 4-65 20-19 NORTH | AURORA, Arapahoe, CO | Fail | State |
| 2024-12-05 | CRESTONE PEAK - GRANDE 4-65 20-19 NORTH | AURORA, Arapahoe, CO | Fail | State |
| 2024-12-05 | CRESTONE PEAK - GRANDE 4-65 20-19 NORTH | AURORA, Arapahoe, CO | Fail | State |
| 2024-12-05 | LARAMIE ENERGY - CONN CREEK GAS — high-priority violation on file | PARACHUTE 10.1 MI. W OF, Garfield, CO | Pass | State |
| 2024-12-05 | HIGHPOINT - PETERSON 5-63-30 SWNE | KERSEY 2.9 MI. E OF, Weld, CO | Pass | State |
| 2024-12-04 | CRESTONE PEAK - MUSTANG BOOSTER STATION — high-priority violation on file | AURORA, Adams, CO | Pass | State |
| 2024-12-04 | CRESTONE PEAK - MUSTANG BOOSTER STATION — high-priority violation on file | AURORA, Adams, CO | Pass | State |
| 2024-12-03 | PLATTE RIVER POWER AUTHORITY - RAWHIDE | WELLINGTON 9.3 MI. N OF, Larimer, CO | Pass | State |
| 2024-11-27 | PRAIRIE OPERATING CO - REEMAN PAD | EATON AREA, Weld, CO | Pass | State |
| 2024-11-22 | SUNCOR ENERGY - DENVER REFINERY — high-priority violation on file | COMMERCE CITY, Adams, CO | Pass | State |
| 2024-11-21 | LARAMIE ENERGY - CONN CREEK GAS — high-priority violation on file | PARACHUTE 10.1 MI. W OF, Garfield, CO | Pass | State |
| 2024-11-21 | SAN LUIS VALLEY REGIONAL SOLID WASTE AUT | MONTE VISTA 3.7 MI. W OF, Rio Grande, CO | Pass | State |
| 2024-11-20 | LARAMIE ENERGY - CONN CREEK GAS — high-priority violation on file | PARACHUTE 10.1 MI. W OF, Garfield, CO | Pass | State |
| 2024-11-19 | LARAMIE ENERGY - CONN CREEK GAS — high-priority violation on file | PARACHUTE 10.1 MI. W OF, Garfield, CO | Pass | State |
| 2024-11-19 | OWENS-BROCKWAY GLASS - WINDSOR #28 — high-priority violation on file | WINDSOR, Weld, CO | Fail | State |
| 2024-11-13 | LARAMIE ENERGY - CONN CREEK GAS — high-priority violation on file | PARACHUTE 10.1 MI. W OF, Garfield, CO | Pass | State |
| 2024-11-13 | LARAMIE ENERGY - CONN CREEK GAS — high-priority violation on file | PARACHUTE 10.1 MI. W OF, Garfield, CO | Pass | State |
| 2024-11-13 | LARAMIE ENERGY - CONN CREEK GAS — high-priority violation on file | PARACHUTE 10.1 MI. W OF, Garfield, CO | Pass | State |
| 2024-11-13 | CHEVRON USA INC - PICEANCE BASIN CENTRAL | PARACHUTE 16.6 MI. NW OF, Garfield, CO | Pass | State |
| 2024-11-13 | PDC ENERGY - KODAK SOUTH 26 SEC | WINDSOR AREA, Weld, CO | Pass | State |
| 2024-11-12 | LARAMIE ENERGY - CONN CREEK GAS — high-priority violation on file | PARACHUTE 10.1 MI. W OF, Garfield, CO | Pass | State |
| 2024-11-12 | LARAMIE ENERGY - CONN CREEK GAS — high-priority violation on file | PARACHUTE 10.1 MI. W OF, Garfield, CO | Pass | State |
| 2024-11-12 | LARAMIE ENERGY - CONN CREEK GAS — high-priority violation on file | PARACHUTE 10.1 MI. W OF, Garfield, CO | Pass | State |
| 2024-11-12 | BONANZA CREEK - PRONGHORN 24-7 BOOSTER | KERSEY 14.7 MI. E OF, Weld, CO | Pass | State |
| 2024-11-07 | WES DJ GAS PROC - WATTENBERG PLANT | AURORA, Adams, CO | Pass | State |
| 2024-11-05 | CRESTONE PEAK - ARKANSAS 4-64 3-2 | WATKINS AREA, Arapahoe, CO | Pass | State |
| 2024-11-04 | DCP OPERATING CO - LIBSACK C.S. | GREELEY AREA, Weld, CO | Pass | State |
| 2024-11-04 | DCP OPERATING CO - NORTHSTAR C.S. | EATON 3.4 MI. N OF, Weld, CO | Pass | State |
| 2024-10-30 | REP PROCESSING LLC - PIERCE GAS PLANT | PIERCE, Weld, CO | Pass | State |
| 2024-10-30 | REP PROCESSING - SEVERANCE COMP STATION | AULT AREA, Weld, CO | Pass | State |
| 2024-10-25 | TEP ROCKY MTN - MAUTZ RANCH | RANGELY 22.0 MI. SE OF, Rio Blanco, CO | Fail | State |
| 2024-10-24 | CRESTONE - STATE BIERSTADT 4-65 35-34 NO | AURORA AREA, Arapahoe, CO | N/A | State |
| 2024-10-24 | CRESTONE - STATE BIERSTADT 4-65 35-34 NO | AURORA AREA, Arapahoe, CO | N/A | State |
| 2024-10-24 | CRESTONE - STATE BIERSTADT 4-65 35-34 NO | AURORA AREA, Arapahoe, CO | N/A | State |
| 2024-10-24 | COLORADO SPRINGS UTILITIES - NIXON PLT | FOUNTAIN AREA, El Paso, CO | Pass | State |
| 2024-10-24 | TEP ROCKY MT - TR 11-5-697 PROD. PIT | PARACHUTE 11.8 MI. N OF, Garfield, CO | Pass | State |
| 2024-10-24 | PLAINS END, LLC | ARVADA, Jefferson, CO | Pass | State |
| 2024-10-24 | COLORADO INTERSTATE GAS CO - CHEYENNE CS — high-priority violation on file | NUNN 14.8 MI. N OF, Weld, CO | Pass | State |
| 2024-10-23 | TEP ROCKY MTN - RU CLOUGH 104 | RIFLE 2.0 MI. W OF, Garfield, CO | Pass | State |
| 2024-10-23 | TEP ROCKY MTN - SG 31-32 PRODUCTION PIT | PARACHUTE 4.2 MI. SW OF, Garfield, CO | Pass | State |
| 2024-10-23 | PLAINS END, LLC | ARVADA, Jefferson, CO | Pass | State |
| 2024-10-23 | WES DJ GATHERING - FREDERICK CS — high-priority violation on file | DACONO AREA, Weld, CO | Pass | State |
| 2024-10-23 | BONANZA CREEK - STATE ANTELOPE CPF O-1 | KERSEY 14.0 MI. E OF, Weld, CO | Fail | State |
| 2024-10-22 | PLAINS END, LLC | ARVADA, Jefferson, CO | Pass | State |
| 2024-10-22 | COLORADO INTERSTATE GAS CO - CHEYENNE CS — high-priority violation on file | NUNN 14.8 MI. N OF, Weld, CO | Pass | State |
| 2024-10-22 | DCP OPERATING CO - ENTERPRISE C.S. — high-priority violation on file | KEENESBURG 5.2 MI. N OF, Weld, CO | Pass | State |
| 2024-10-22 | BONANZA CREEK - ANTELOPE CPF 13-21 | KERSEY 10.4 MI. E OF, Weld, CO | Fail | State |
| 2024-10-22 | BONANZA CREEK - ANTELOPE CPF 13-21 | KERSEY 10.4 MI. E OF, Weld, CO | Fail | State |
| 2024-10-21 | PLAINS END, LLC | ARVADA, Jefferson, CO | Pass | State |
| 2024-10-21 | DCP OPERATING CO - ROGGEN NGPP — high-priority violation on file | KEENESBURG 4.4 MI. E OF, Weld, CO | Fail | State |
| 2024-10-21 | BONANZA CREEK - ANTELOPE CPF 13-21 | KERSEY 10.4 MI. E OF, Weld, CO | Fail | State |
| 2024-10-19 | COLORADO INTERSTATE GAS- KIT CARSON C.S. | KIT CARSON 6.6 MI. S OF, Cheyenne, CO | Pass | State |
| 2024-10-18 | UTAH GAS - DRAGON TRAIL — high-priority violation on file | RANGELY 16.7 MI. S OF, Rio Blanco, CO | Pass | State |
| 2024-10-17 | COLORADO INTERSTATE GAS- KIT CARSON C.S. | KIT CARSON 6.6 MI. S OF, Cheyenne, CO | Pass | State |
| 2024-10-17 | COLORADO INTERSTATE GAS- KIT CARSON C.S. | KIT CARSON 6.6 MI. S OF, Cheyenne, CO | Pass | State |
| 2024-10-17 | COLORADO INTERSTATE GAS- KIT CARSON C.S. | KIT CARSON 6.6 MI. S OF, Cheyenne, CO | Pass | State |
| 2024-10-17 | PUBLIC SERVICE CO- WILLIAMS FORK C.S. | SILVERTHORNE 12.8 MI. N OF, Grand, CO | Pass | State |
| 2024-10-17 | PUBLIC SERVICE CO- WILLIAMS FORK C.S. | SILVERTHORNE 12.8 MI. N OF, Grand, CO | Pass | State |
| 2024-10-17 | CF & I STEEL L.P. DBA EVRAZ ROCKY MTN ST — high-priority violation on file | PUEBLO AREA, Pueblo, CO | Pass | State |
| 2024-10-16 | ROCKY MOUNTAIN MIDSTREAM - WATKINS C.S. | BENNETT AREA, Adams, CO | Pass | State |
| 2024-10-16 | COLORADO INTERSTATE GAS- KIT CARSON C.S. | KIT CARSON 6.6 MI. S OF, Cheyenne, CO | Pass | State |
| 2024-10-16 | COLORADO INTERSTATE GAS- KIT CARSON C.S. | KIT CARSON 6.6 MI. S OF, Cheyenne, CO | Pass | State |
| 2024-10-16 | COLORADO INTERSTATE GAS- KIT CARSON C.S. | KIT CARSON 6.6 MI. S OF, Cheyenne, CO | Pass | State |
| 2024-10-16 | PUBLIC SERVICE CO GREASEWOOD STATION | MEEKER 16.7 MI. SW OF, Rio Blanco, CO | Pass | State |
| 2024-10-16 | PUBLIC SERVICE CO GREASEWOOD STATION | MEEKER 16.7 MI. SW OF, Rio Blanco, CO | Pass | State |
| 2024-10-15 | COLORADO INTERSTATE GAS- KIT CARSON C.S. | KIT CARSON 6.6 MI. S OF, Cheyenne, CO | Pass | State |
| 2024-10-15 | COLORADO INTERSTATE GAS- KIT CARSON C.S. | KIT CARSON 6.6 MI. S OF, Cheyenne, CO | Pass | State |
| 2024-10-15 | QB ENERGY - PICEANCE CREEK CS — high-priority violation on file | MEEKER 16.9 MI. SW OF, Rio Blanco, CO | Pass | State |
| 2024-10-15 | HIGHPOINT - GRINDE 1-64-5_4 | HUDSON AREA, Weld, CO | Pass | State |
| 2024-10-10 | BONANZA CREEK - PRONGHORN 24-7 BOOSTER | KERSEY 14.7 MI. E OF, Weld, CO | Pass | State |
| 2024-10-09 | WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file | FORT LUPTON, Weld, CO | Pass | State |
| 2024-10-08 | WESTERN SUGAR CO - FORT MORGAN FACTORY | FORT MORGAN AREA, Morgan, CO | Pass | State |
| 2024-10-07 | CHAFFEE COUNTY LANDFILL | SALIDA 9.0 MI. NW OF, Chaffee, CO | Pass | State |
| 2024-10-04 | WES DJ GATHERING - FREDERICK CS — high-priority violation on file | DACONO AREA, Weld, CO | Pass | State |
| 2024-10-03 | AURORA CONV CENT- GAYLORD ROCKIES RESORT | AURORA, Adams, CO | Fail | State |
| 2024-10-03 | AURORA CONV CENT- GAYLORD ROCKIES RESORT | AURORA, Adams, CO | Fail | State |
| 2024-10-03 | WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file | FORT LUPTON, Weld, CO | Pass | State |
| 2024-10-03 | PETRO OPERATING - HOMESTEAD 01N-66W-34 | BRIGHTON, Weld, CO | Pass | State |
| 2024-10-03 | PETRO OPERATING - HOMESTEAD 01N-66W-34 | BRIGHTON, Weld, CO | Pass | State |
| 2024-10-02 | DCP OPERATING CO - ENTERPRISE C.S. — high-priority violation on file | KEENESBURG 5.2 MI. N OF, Weld, CO | Pass | State |
| 2024-10-02 | DCP OPERATING CO - ENTERPRISE C.S. — high-priority violation on file | KEENESBURG 5.2 MI. N OF, Weld, CO | Pass | State |
| 2024-10-01 | CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file | LYONS AREA, Boulder, CO | Pass | State |
| 2024-10-01 | DCP OPERATING CO - ENTERPRISE C.S. — high-priority violation on file | KEENESBURG 5.2 MI. N OF, Weld, CO | Pass | State |
| 2024-10-01 | NOBLE ENERGY - LD02 ECONODE GEN 1 HYBRID | RAYMER (NEW RAYMER) 11.1 MI. N, Weld, CO | Pass | State |
| 2024-09-26 | CONAGRA FOODS - FLORENCE ST BAKERY | DENVER, Denver, CO | Pass | State |
| 2024-09-23 | PLATTE RIVER BIOGAS - 19179 CR 49 | LA SALLE 6.4 MI. SE OF, Weld, CO | Pass | State |
| 2024-09-23 | DCP OPERATING CO - CROSSROADS FACILITY | KERSEY 5.0 MI. N OF, Weld, CO | Pass | State |
| 2024-09-23 | DCP OPERATING CO - CROSSROADS FACILITY | KERSEY 5.0 MI. N OF, Weld, CO | Pass | State |
| 2024-09-20 | SUNCOR ENERGY - DENVER REFINERY — high-priority violation on file | COMMERCE CITY, Adams, CO | Pass | State |
| 2024-09-19 | AMRIZE PORTLAND PLANT — high-priority violation on file | FLORENCE 3.8 MI. E OF, Fremont, CO | Pass | State |
| 2024-09-19 | DCP OPERATING CO - O'CONNOR GAS PLANT | KERSEY AREA, Weld, CO | Pass | State |
| 2024-09-19 | DCP OPERATING CO - O'CONNOR GAS PLANT | KERSEY AREA, Weld, CO | Pass | State |
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Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.