EPA Air · stack tests by state and year

Air-emissions stack tests in Colorado, 2021

407Stack 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 2021; one facility can appear more than once, because this is a record of what happened rather than a list of places.

Counties in Colorado, 2021

Colorado, other years

Air-emissions stack tests recorded in Colorado, 2021

Date	Facility	Where	Kind	Agency
2021-04-14	SIMCOE - MIERA CENTRAL DELIVERY POINT	LA PLATA COUNTY, La Plata, CO	Pass	U.S. EPA
2021-04-14	SIMCOE - MIERA CENTRAL DELIVERY POINT	LA PLATA COUNTY, La Plata, CO	Pass	U.S. EPA
2021-04-13	BLACK HILLS ELECTRIC GENERATION - PAGS	PUEBLO, Pueblo, CO	Pass	State
2021-04-13	SOUTHERN STAR CENTRAL GAS PIPELINE CHEYE	NUNN 18.4 MI. N OF, Weld, CO	Pass	State
2021-04-13	ROCKY MOUNTAIN MIDSTREAM - MUSTANG CS — high-priority violation on file	LA SALLE 8.4 MI. N OF, Weld, CO	Pass	State
2021-04-12	ROCKY MOUNTAIN MIDSTREAM - MUSTANG CS — high-priority violation on file	LA SALLE 8.4 MI. N OF, Weld, CO	Pass	State
2021-04-08	LARAMIE ENERGY - MVS COMPRESSOR STATION	COLLBRAN 10.8 MI. E OF, Mesa, CO	Pass	State
2021-04-08	LARAMIE ENERGY - MVS COMPRESSOR STATION	COLLBRAN 10.8 MI. E OF, Mesa, CO	Pass	State
2021-04-08	LARAMIE ENERGY - MVS COMPRESSOR STATION	COLLBRAN 10.8 MI. E OF, Mesa, CO	Pass	State
2021-04-08	LARAMIE ENERGY - MVS COMPRESSOR STATION	COLLBRAN 10.8 MI. E OF, Mesa, CO	Pass	State
2021-04-07	LARAMIE ENERGY - MVS COMPRESSOR STATION	COLLBRAN 10.8 MI. E OF, Mesa, CO	Pass	State
2021-04-06	LARAMIE ENERGY - MVS COMPRESSOR STATION	COLLBRAN 10.8 MI. E OF, Mesa, CO	Pass	State
2021-04-03	CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file	LYONS AREA, Boulder, CO	Pass	State
2021-04-02	CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file	LYONS AREA, Boulder, CO	Pass	State
2021-03-31	AMRIZE PORTLAND PLANT — high-priority violation on file	FLORENCE 3.8 MI. E OF, Fremont, CO	Pass	State
2021-03-30	CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file	LYONS AREA, Boulder, CO	Pass	State
2021-03-30	SIMCOE - IRON HORSE CENTRAL DELIVERY POINT	SOUTHERN UTE RESERVATION, La Plata, CO	Pass	State
2021-03-30	RED CEDAR GATHERING COMPANY - SOUTH IGNACIO CENTRAL DEL	SOUTHERN UTE RESERVATION, La Plata, CO	Pass	State
2021-03-27	GCC RIO GRANDE - PUEBLO CEMENT PLANT — high-priority violation on file	PUEBLO 4.5 MI. S OF, Pueblo, CO	Pass	State
2021-03-26	BARGATH - RYAN GULCH COMPRESSOR STATION — high-priority violation on file	MEEKER 23.2 MI. W OF, Rio Blanco, CO	Pass	State
2021-03-26	PDC ENERGY - WIEDEMAN/BOOMERANG PAD — high-priority violation on file	GREELEY AREA, Weld, CO	Pass	State
2021-03-26	PDC ENERGY - WIEDEMAN/BOOMERANG PAD — high-priority violation on file	GREELEY AREA, Weld, CO	Fail	State
2021-03-25	BARGATH - RYAN GULCH COMPRESSOR STATION — high-priority violation on file	MEEKER 23.2 MI. W OF, Rio Blanco, CO	Pass	State
2021-03-25	BARGATH - RYAN GULCH COMPRESSOR STATION — high-priority violation on file	MEEKER 23.2 MI. W OF, Rio Blanco, CO	Pass	State
2021-03-25	PDC ENERGY - WIEDEMAN/BOOMERANG PAD — high-priority violation on file	GREELEY AREA, Weld, CO	Fail	State
2021-03-25	PDC ENERGY - WIEDEMAN/BOOMERANG PAD — high-priority violation on file	GREELEY AREA, Weld, CO	Fail	State
2021-03-24	GRAND RIVER GATHERING - PUMBA CS	RIFLE 3.4 MI. S OF, Garfield, CO	Pass	State
2021-03-24	GRAND RIVER GATHERING - PUMBA CS	RIFLE 3.4 MI. S OF, Garfield, CO	Pass	State
2021-03-24	GCC RIO GRANDE - PUEBLO CEMENT PLANT — high-priority violation on file	PUEBLO 4.5 MI. S OF, Pueblo, CO	Pass	State
2021-03-24	BARGATH - RYAN GULCH COMPRESSOR STATION — high-priority violation on file	MEEKER 23.2 MI. W OF, Rio Blanco, CO	Pass	State
2021-03-24	BARGATH - RYAN GULCH COMPRESSOR STATION — high-priority violation on file	MEEKER 23.2 MI. W OF, Rio Blanco, CO	Pass	State
2021-03-24	ROCKY MOUNTAIN MIDSTREAM - FT LUPTON GAS	FORT LUPTON AREA, Weld, CO	Pass	State
2021-03-24	PDC ENERGY - BOST FARM 5-7 PAD	GREELEY, Weld, CO	Fail	State
2021-03-24	PDC ENERGY - BOST FARM 5-7 PAD	GREELEY, Weld, CO	Fail	State
2021-03-23	PDC ENERGY - BOST FARM 5-7 PAD	GREELEY, Weld, CO	Fail	State
2021-03-23	PDC ENERGY - BOST FARM 5-7 PAD	GREELEY, Weld, CO	Fail	State
2021-03-22	COLORADO INTERSTATE GAS CO - CHEYENNE CS — high-priority violation on file	NUNN 14.8 MI. N OF, Weld, CO	Pass	State
2021-03-22	COLORADO INTERSTATE GAS CO - CHEYENNE CS — high-priority violation on file	NUNN 14.8 MI. N OF, Weld, CO	Pass	State
2021-03-22	BAYSWATER E&P - LEFFLER 13, 14, 23, 24-2	AULT AREA, Weld, CO	Pass	State
2021-03-22	DCP OPERATING CO - MILTON C.S.	LA SALLE 8.3 MI. N OF, Weld, CO	Pass	State
2021-03-22	DCP OPERATING CO - MILTON C.S.	LA SALLE 8.3 MI. N OF, Weld, CO	Pass	State
2021-03-22	PDC ENERGY - BOST FARM 5-7 PAD	GREELEY, Weld, CO	Fail	State
2021-03-22	PDC ENERGY - BOST FARM 5-7 PAD	GREELEY, Weld, CO	Fail	State
2021-03-19	RED CEDAR GATHERING COMPANY - SAMBRITO COMPRESSOR STATION	SOUTHERN UTE RESERVATION, La Plata, CO	Pass	State
2021-03-18	QB ENERGY OPERATING - STORY GULCH C.S. — high-priority violation on file	PARACHUTE 13.8 MI. N OF, Garfield, CO	Pass	State
2021-03-18	QB ENERGY OPERATING - STORY GULCH C.S. — high-priority violation on file	PARACHUTE 13.8 MI. N OF, Garfield, CO	Pass	State
2021-03-18	ROCKIES EXPRESS PIPELINE-CHEYENNE HUB CS	NUNN 14.3 MI. N OF, Weld, CO	Pass	State
2021-03-18	ROCKIES EXPRESS PIPELINE-CHEYENNE HUB CS	NUNN 14.3 MI. N OF, Weld, CO	Pass	State
2021-03-18	ROCKIES EXPRESS PIPELINE-CHEYENNE HUB CS	NUNN 14.3 MI. N OF, Weld, CO	Pass	State
2021-03-18	PDC ENERGY - LINCOLN STATE 3-18 PAD	SEVERANCE AREA, Weld, CO	Fail	State
2021-03-17	QB ENERGY OPERATING - STORY GULCH C.S. — high-priority violation on file	PARACHUTE 13.8 MI. N OF, Garfield, CO	Pass	State
2021-03-17	ROCKIES EXPRESS PIPELINE-CHEYENNE HUB CS	NUNN 14.3 MI. N OF, Weld, CO	Pass	State
2021-03-17	WES DJ GATHERING - ST. VRAIN C.S.	PLATTEVILLE AREA, Weld, CO	Fail	State
2021-03-16	QB ENERGY OPERATING - STORY GULCH C.S. — high-priority violation on file	PARACHUTE 13.8 MI. N OF, Garfield, CO	Pass	State
2021-03-15	QB ENERGY OPERATING - STORY GULCH C.S. — high-priority violation on file	PARACHUTE 13.8 MI. N OF, Garfield, CO	Pass	State
2021-03-15	QB ENERGY OPERATING - STORY GULCH C.S. — high-priority violation on file	PARACHUTE 13.8 MI. N OF, Garfield, CO	Pass	State
2021-03-12	GRAND RIVER GATHERING - HUNTER MESA CS	RIFLE 3.3 MI. SE OF, Garfield, CO	Pass	State
2021-03-12	GRAND RIVER GATHERING - HUNTER MESA CS	RIFLE 3.3 MI. SE OF, Garfield, CO	Pass	State
2021-03-11	GRAND RIVER GATHERING - HUNTER MESA CS	RIFLE 3.3 MI. SE OF, Garfield, CO	Pass	State
2021-03-11	ROCKY MOUNTAIN MIDSTREAM - WEST BRIGHTON	TODD CREEK AREA, Weld, CO	Pass	State
2021-03-11	ROCKY MOUNTAIN MIDSTREAM - LOCHBUIE C.S.	LOCHBUIE AREA, Weld, CO	Pass	State
2021-03-11	ROCKY MOUNTAIN MIDSTREAM - LOCHBUIE C.S.	LOCHBUIE AREA, Weld, CO	Pass	State
2021-03-11	PDC ENERGY - MCNEAR 10-9 PAD	GREELEY AREA, Weld, CO	Fail	State
2021-03-11	PDC ENERGY - MCNEAR 10-9 PAD	GREELEY AREA, Weld, CO	Fail	State
2021-03-10	GRAND RIVER GATHERING - HUNTER MESA CS	RIFLE 3.3 MI. SE OF, Garfield, CO	Pass	State
2021-03-10	ROCKY MOUNTAIN MIDSTREAM - WEST BRIGHTON	TODD CREEK AREA, Weld, CO	Pass	State
2021-03-10	ROCKY MOUNTAIN MIDSTREAM - WEST BRIGHTON	TODD CREEK AREA, Weld, CO	Pass	State
2021-03-10	PDC ENERGY - MCNEAR 10-9 PAD	GREELEY AREA, Weld, CO	Fail	State
2021-03-10	PDC ENERGY - MCNEAR 10-9 PAD	GREELEY AREA, Weld, CO	Fail	State
2021-03-09	GRAND RIVER GATHERING - HUNTER MESA CS	RIFLE 3.3 MI. SE OF, Garfield, CO	Pass	State
2021-03-09	ROCKY MOUNTAIN MIDSTREAM - WEST BRIGHTON	TODD CREEK AREA, Weld, CO	Pass	State
2021-03-09	ROCKY MOUNTAIN MIDSTREAM - WEST BRIGHTON	TODD CREEK AREA, Weld, CO	Pass	State
2021-03-09	PDC ENERGY - LINCOLN STATE 3-18 PAD	SEVERANCE AREA, Weld, CO	Fail	State
2021-03-09	PDC ENERGY - LINCOLN STATE 3-18 PAD	SEVERANCE AREA, Weld, CO	Fail	State
2021-03-09	PDC ENERGY - LINCOLN STATE 3-18 PAD	SEVERANCE AREA, Weld, CO	Fail	State
2021-03-08	ROCKY MOUNTAIN MIDSTREAM - WEST BRIGHTON	TODD CREEK AREA, Weld, CO	Pass	State
2021-03-05	CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file	LYONS AREA, Boulder, CO	Pass	State
2021-03-05	CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file	LYONS AREA, Boulder, CO	Pass	State
2021-03-04	CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file	LYONS AREA, Boulder, CO	Pass	State
2021-03-04	CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file	LYONS AREA, Boulder, CO	Pass	State
2021-03-04	MONTEZUMA COUNTY LANDFILL	CORTEZ 2.3 MI. S OF, Montezuma, CO	N/A	State
2021-03-04	PDC ENERGY - TROUDT 18-27 PAD	GREELEY, Weld, CO	Fail	State
2021-03-03	CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file	LYONS AREA, Boulder, CO	Pass	State
2021-03-03	COORSTEK - TABLE MOUNTAIN CENTER EAST	GOLDEN, Jefferson, CO	Fail	State
2021-03-03	PDC ENERGY - TROUDT 18-27 PAD	GREELEY, Weld, CO	Fail	State
2021-03-03	PDC ENERGY - TROUDT 18-27 PAD	GREELEY, Weld, CO	Fail	State
2021-03-03	PDC ENERGY - TROUDT 18-27 PAD	GREELEY, Weld, CO	Fail	State
2021-03-03	ARKOMA OPERATIONS, LLC - IGNACIO GAS TREATING PLANT	SOUTHERN UTE RESERVATION, La Plata, CO	Pass	State
2021-03-02	DCP OPERATING CO - MEWBOURN — high-priority violation on file	GILCREST 2.4 MI. N OF, Weld, CO	Pass	State
2021-03-02	PDC ENERGY - TROUDT 18-27 PAD	GREELEY, Weld, CO	Fail	State
2021-03-02	PDC ENERGY - TROUDT 18-27 PAD	GREELEY, Weld, CO	Fail	State
2021-03-01	TRI STATE GENERATION & TRANS - CRAIG	CRAIG 2.9 MI. SW OF, Moffat, CO	Pass	State
2021-02-19	CS WIND AMERICA, INC — high-priority violation on file	PUEBLO, Pueblo, CO	Pass	State
2021-02-19	PUBLIC SERV - ROCKY MOUNTAIN ENERGY	HUDSON AREA, Weld, CO	Pass	State
2021-02-17	TRI STATE GENERATION & TRANS - CRAIG	CRAIG 2.9 MI. SW OF, Moffat, CO	Pass	State
2021-02-16	TRI STATE GENERATION & TRANS - CRAIG	CRAIG 2.9 MI. SW OF, Moffat, CO	Pass	State
2021-02-14	SUNCOR ENERGY - DENVER REFINERY — high-priority violation on file	COMMERCE CITY, Adams, CO	Pass	State
2021-02-14	SUNCOR ENERGY - DENVER REFINERY — high-priority violation on file	COMMERCE CITY, Adams, CO	Pass	State
2021-02-12	CS WIND AMERICA, INC — high-priority violation on file	PUEBLO, Pueblo, CO	Pass	State
2021-02-09	ENVENT CORPORATION - MOBILE OXIDIZER	LA PORTE, Undetermined, CO	Pass	State

Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.