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 |
|---|---|---|---|---|
| 2024-06-25 | PRAIRIE OPERATING - ELDER PAD | EATON 3.7 MI. N OF, Weld, CO | Pass | State |
| 2024-06-24 | ROCKIES EXPRESS PIPELINE-CHEYENNE HUB CS | NUNN 14.3 MI. N OF, Weld, CO | Pass | State |
| 2024-06-24 | NOBLE ENERGY - WELLS RANCH BB01 & AF05 | KERSEY 9.7 MI. N OF, Weld, CO | Pass | State |
| 2024-06-21 | PUBLIC SERVICE CO - HAYDEN PLT | HAYDEN, Routt, CO | Pass | State |
| 2024-06-21 | WILLIAMS GILCREST - KERSEY CS | KERSEY AREA, Weld, CO | Pass | State |
| 2024-06-20 | PUBLIC SERVICE CO - HAYDEN PLT | HAYDEN, Routt, CO | Pass | State |
| 2024-06-19 | AMRIZE PORTLAND PLANT — high-priority violation on file | FLORENCE 3.8 MI. E OF, Fremont, CO | Pass | State |
| 2024-06-19 | BARGATH LLC - PARACHUTE CREEK GAS PLANT | PARACHUTE 2.9 MI. NW OF, Garfield, CO | Pass | State |
| 2024-06-19 | BARGATH LLC - PARACHUTE CREEK GAS PLANT | PARACHUTE 2.9 MI. NW OF, Garfield, CO | Pass | State |
| 2024-06-19 | NYDIG DFM - SURPRISE S9 FACILITY | WALDEN AREA, Jackson, CO | Pass | State |
| 2024-06-19 | NYDIG DFM - SURPRISE S9 FACILITY | WALDEN AREA, Jackson, CO | Pass | State |
| 2024-06-18 | AMRIZE PORTLAND PLANT — high-priority violation on file | FLORENCE 3.8 MI. E OF, Fremont, CO | N/A | State |
| 2024-06-18 | BARGATH LLC - PARACHUTE CREEK GAS PLANT | PARACHUTE 2.9 MI. NW OF, Garfield, CO | Pass | State |
| 2024-06-18 | BARGATH LLC - PARACHUTE CREEK GAS PLANT | PARACHUTE 2.9 MI. NW OF, Garfield, CO | Pass | State |
| 2024-06-17 | MID-AMERICA PIPELINE CO DOVE CR STA | DOVE CREEK 5.3 MI. NW OF, Dolores, CO | Pass | State |
| 2024-06-17 | BLACK HILLS ELECTRIC GENERATION - PAGS | PUEBLO, Pueblo, CO | Pass | State |
| 2024-06-15 | TRI STATE GENERATION & TRANS - CRAIG | CRAIG 2.9 MI. SW OF, Moffat, CO | Pass | State |
| 2024-06-14 | QB ENERGY OPERATING - STORY GULCH C.S. — high-priority violation on file | PARACHUTE 13.8 MI. N OF, Garfield, CO | Pass | State |
| 2024-06-13 | COLORADO SPRINGS UTILITIES - NIXON PLT | FOUNTAIN AREA, El Paso, CO | Pass | State |
| 2024-06-12 | AGC BIOLOGICS INC - AGC BIOLOGICS | BOULDER, Boulder, CO | Pass | State |
| 2024-06-12 | GREENGAS COLORADO - LOST CREEK DAIRY | ROGGEN AREA, Weld, CO | Fail | State |
| 2024-06-12 | COLORADO GREENGAS -PROSPECT VALLEY DAIRY | KEENESBURG AREA, Weld, CO | Fail | State |
| 2024-06-11 | AGC BIOLOGICS INC - AGC BIOLOGICS | BOULDER, Boulder, CO | Pass | State |
| 2024-06-05 | BLACK HILLS ELECTRIC GENERATION - PAGS | PUEBLO, Pueblo, CO | Pass | State |
| 2024-06-05 | SOUTHERN STAR CENTRAL GAS PIPELINE CHEYE | NUNN 18.4 MI. N OF, Weld, CO | N/A | State |
| 2024-06-03 | BLACK HILLS ELECTRIC GENERATION - PAGS | PUEBLO, Pueblo, CO | Pass | State |
| 2024-06-03 | BLACK HILLS ELECTRIC GENERATION - PAGS | PUEBLO, Pueblo, CO | Pass | State |
| 2024-05-23 | BARGATH - RYAN GULCH COMPRESSOR STATION — high-priority violation on file | MEEKER 23.2 MI. W OF, Rio Blanco, CO | Pass | State |
| 2024-05-23 | BARGATH - RYAN GULCH COMPRESSOR STATION — high-priority violation on file | MEEKER 23.2 MI. W OF, Rio Blanco, CO | Pass | State |
| 2024-05-23 | BARGATH - RYAN GULCH COMPRESSOR STATION — high-priority violation on file | MEEKER 23.2 MI. W OF, Rio Blanco, CO | Pass | State |
| 2024-05-23 | WES DJ GATHERING - FREDERICK CS — high-priority violation on file | DACONO AREA, Weld, CO | Pass | State |
| 2024-05-23 | ASPHALT SPECIALTIES - STILES MINING RESO | EVANS, Weld, CO | Pass | State |
| 2024-05-22 | UTAH GAS - DRAGON TRAIL — high-priority violation on file | RANGELY 16.7 MI. S OF, Rio Blanco, CO | Fail | State |
| 2024-05-22 | BARGATH - RYAN GULCH COMPRESSOR STATION — high-priority violation on file | MEEKER 23.2 MI. W OF, Rio Blanco, CO | Pass | State |
| 2024-05-22 | WES DJ GATHERING - FREDERICK CS — high-priority violation on file | DACONO AREA, Weld, CO | Pass | State |
| 2024-05-21 | PUBLIC SERVICE CO - PAWNEE PLT — high-priority violation on file | BRUSH 2.6 MI. N OF, Morgan, CO | Pass | State |
| 2024-05-21 | UTAH GAS - DRAGON TRAIL — high-priority violation on file | RANGELY 16.7 MI. S OF, Rio Blanco, CO | N/A | State |
| 2024-05-21 | UTAH GAS - DRAGON TRAIL — high-priority violation on file | RANGELY 16.7 MI. S OF, Rio Blanco, CO | Pass | State |
| 2024-05-21 | BARGATH - RYAN GULCH COMPRESSOR STATION — high-priority violation on file | MEEKER 23.2 MI. W OF, Rio Blanco, CO | Pass | State |
| 2024-05-20 | SIMCOE LLC - PINON COMPRESSOR FACILITY | DURANGO 5.5 MI. E OF, La Plata, CO | Pass | State |
| 2024-05-20 | DCP OPERATING CO - LUCERNE 2 GAS PLANT — high-priority violation on file | GREELEY AREA, Weld, CO | Pass | State |
| 2024-05-20 | DCP OPERATING CO - LUCERNE 2 GAS PLANT — high-priority violation on file | GREELEY AREA, Weld, CO | Fail | State |
| 2024-05-17 | ROCKY MOUNTAIN BOTTLE CO - 10619 W 50TH | WHEAT RIDGE, Jefferson, CO | Pass | State |
| 2024-05-17 | POCO HOLDCO LLC - WILLOW 22 WEST | HUDSON AREA, Weld, CO | N/A | State |
| 2024-05-17 | POCO HOLDCO LLC - WILLOW 22 WEST | HUDSON AREA, Weld, CO | N/A | State |
| 2024-05-15 | ROCKY MOUNTAIN BOTTLE CO - 10619 W 50TH | WHEAT RIDGE, Jefferson, CO | N/A | State |
| 2024-05-14 | MOLSON COORS USA - GOLDEN FACILITY | GOLDEN, Jefferson, CO | Pass | State |
| 2024-05-13 | DCP OPERATING CO - GODFREY BOTTOM C.S. | EVANS AREA, Weld, CO | Pass | State |
| 2024-05-13 | DCP OPERATING CO - GODFREY BOTTOM C.S. | EVANS AREA, Weld, CO | Pass | State |
| 2024-05-10 | GRAND RIVER GATHERING - HUNTER MESA CS | RIFLE 3.3 MI. SE OF, Garfield, CO | Pass | State |
| 2024-05-10 | GRAND RIVER GATHERING - HUNTER MESA CS | RIFLE 3.3 MI. SE OF, Garfield, CO | Pass | State |
| 2024-05-09 | GRAND RIVER GATHERING - HUNTER MESA CS | RIFLE 3.3 MI. SE OF, Garfield, CO | Pass | State |
| 2024-05-09 | DCP OPERATING - CANVASBACK C.S. | GREELEY, Weld, CO | Pass | State |
| 2024-05-08 | WES DJ GAS PROC - WATTENBERG PLANT | AURORA, Adams, CO | Pass | State |
| 2024-05-08 | GRAND RIVER GATHERING - HUNTER MESA CS | RIFLE 3.3 MI. SE OF, Garfield, CO | Pass | State |
| 2024-05-08 | DCP OPERATING CO - O'CONNOR GAS PLANT | KERSEY AREA, Weld, CO | Pass | State |
| 2024-05-08 | DCP OPERATING CO - O'CONNOR GAS PLANT | KERSEY AREA, Weld, CO | Pass | State |
| 2024-05-07 | MICROCHIP TECHNOLOGY INCORPORATED | COLORADO SPRINGS, El Paso, CO | Pass | State |
| 2024-05-07 | GRAND RIVER GATHERING - PUMBA CS | RIFLE 3.4 MI. S OF, Garfield, CO | Pass | State |
| 2024-05-06 | GRAND RIVER GATHERING - PUMBA CS | RIFLE 3.4 MI. S OF, Garfield, CO | Pass | State |
| 2024-05-06 | MESA COUNTY ORCHARD MESA LANDFILL | GRAND JUNCTION AREA, Mesa, CO | Pass | State |
| 2024-05-02 | PLAINS END, LLC | ARVADA, Jefferson, CO | Pass | State |
| 2024-05-01 | CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file | LYONS AREA, Boulder, CO | Pass | State |
| 2024-05-01 | PLAINS END, LLC | ARVADA, Jefferson, CO | Pass | State |
| 2024-04-30 | PLAINS END, LLC | ARVADA, Jefferson, CO | Pass | State |
| 2024-04-30 | LARAMIE ENERGY - MVS COMPRESSOR STATION | COLLBRAN 10.8 MI. E OF, Mesa, CO | Pass | State |
| 2024-04-30 | LARAMIE ENERGY - MVS COMPRESSOR STATION | COLLBRAN 10.8 MI. E OF, Mesa, CO | Pass | State |
| 2024-04-29 | PLAINS END, LLC | ARVADA, Jefferson, CO | Pass | State |
| 2024-04-26 | LARAMIE ENERGY - MVS COMPRESSOR STATION | COLLBRAN 10.8 MI. E OF, Mesa, CO | Pass | State |
| 2024-04-26 | WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file | FORT LUPTON, Weld, CO | Pass | State |
| 2024-04-26 | WES DJ GATHERING - FREDERICK CS — high-priority violation on file | DACONO AREA, Weld, CO | Pass | State |
| 2024-04-25 | LARAMIE ENERGY - MVS COMPRESSOR STATION | COLLBRAN 10.8 MI. E OF, Mesa, CO | Pass | State |
| 2024-04-25 | WES DJ GATHERING - FREDERICK CS — high-priority violation on file | DACONO AREA, Weld, CO | Pass | State |
| 2024-04-25 | WES DJ GATHERING - FREDERICK CS — high-priority violation on file | DACONO AREA, Weld, CO | Pass | State |
| 2024-04-24 | GENERAL SHALE - DENVER BRICK PLANT #60 | DENVER, Denver, CO | Pass | State |
| 2024-04-24 | LARAMIE ENERGY - MVS COMPRESSOR STATION | COLLBRAN 10.8 MI. E OF, Mesa, CO | Pass | State |
| 2024-04-24 | GCC RIO GRANDE - PUEBLO CEMENT PLANT — high-priority violation on file | PUEBLO 4.5 MI. S OF, Pueblo, CO | Pass | State |
| 2024-04-23 | LARAMIE ENERGY - MVS COMPRESSOR STATION | COLLBRAN 10.8 MI. E OF, Mesa, CO | Pass | State |
| 2024-04-23 | GCC RIO GRANDE - PUEBLO CEMENT PLANT — high-priority violation on file | PUEBLO 4.5 MI. S OF, Pueblo, CO | Pass | State |
| 2024-04-23 | WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file | FORT LUPTON, Weld, CO | Pass | State |
| 2024-04-18 | EXTRACTION O&G - ALMA 1S-66-2524 | DENVER, Adams, CO | Pass | State |
| 2024-04-18 | EXTRACTION O&G - ALMA 1S-66-2524 | DENVER, Adams, CO | Pass | State |
| 2024-04-18 | CF & I STEEL L.P. DBA EVRAZ ROCKY MTN ST — high-priority violation on file | PUEBLO AREA, Pueblo, CO | Pass | State |
| 2024-04-18 | ROCKY MOUNTAIN MIDSTREAM - WEST BRIGHTON | TODD CREEK AREA, Weld, CO | Pass | State |
| 2024-04-18 | ASPHALT SPECIALTIES - STILES MINING RESO | EVANS, Weld, CO | N/A | State |
| 2024-04-18 | ASPHALT SPECIALTIES - STILES MINING RESO | EVANS, Weld, CO | N/A | State |
| 2024-04-17 | CF & I STEEL L.P. DBA EVRAZ ROCKY MTN ST — high-priority violation on file | PUEBLO AREA, Pueblo, CO | Pass | State |
| 2024-04-17 | DCP OPERATING CO - MEWBOURN — high-priority violation on file | GILCREST 2.4 MI. N OF, Weld, CO | Pass | State |
| 2024-04-17 | DCP OPERATING CO - MEWBOURN — high-priority violation on file | GILCREST 2.4 MI. N OF, Weld, CO | Pass | State |
| 2024-04-17 | DCP OPERATING CO - MEWBOURN — high-priority violation on file | GILCREST 2.4 MI. N OF, Weld, CO | Pass | State |
| 2024-04-17 | DCP OPERATING CO - TROUDT C.S. | GREELEY, Weld, CO | Pass | State |
| 2024-04-17 | NOBLE ENERGY - WELLS RANCH AE20 ECONODE | KERSEY 11.1 MI. NE OF, Weld, CO | Pass | State |
| 2024-04-17 | ROCKY MOUNTAIN MIDSTREAM - WEST BRIGHTON | TODD CREEK AREA, Weld, CO | Pass | State |
| 2024-04-17 | ROCKY MOUNTAIN MIDSTREAM - WEST BRIGHTON | TODD CREEK AREA, Weld, CO | Pass | State |
| 2024-04-17 | SUMMIT DJ-O OPERATING - MAKENA GAS PLANT | GROVER 16.1 MI. N OF, Weld, CO | Pass | State |
| 2024-04-16 | WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file | FORT LUPTON, Weld, CO | N/A | State |
| 2024-04-16 | DCP OPERATING CO - MEWBOURN — high-priority violation on file | GILCREST 2.4 MI. N OF, Weld, CO | Pass | State |
| 2024-04-16 | DCP OPERATING CO - MEWBOURN — high-priority violation on file | GILCREST 2.4 MI. N OF, Weld, CO | Pass | State |
| 2024-04-16 | DCP OPERATING CO - MEWBOURN — high-priority violation on file | GILCREST 2.4 MI. N OF, Weld, CO | Pass | State |
| 2024-04-16 | DCP OPERATING CO - MEWBOURN — high-priority violation on file | GILCREST 2.4 MI. N OF, Weld, CO | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.