EPA Air · stack tests by state and year

Air-emissions stack tests in Colorado, 2023

436Stack 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 2023; one facility can appear more than once, because this is a record of what happened rather than a list of places.

Counties in Colorado, 2023

Colorado, other years

Air-emissions stack tests recorded in Colorado, 2023

Date	Facility	Where	Kind	Agency
2023-04-30	WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file	FORT LUPTON, Weld, CO	Pass	State
2023-04-28	PLAINS END, LLC	ARVADA, Jefferson, CO	N/A	State
2023-04-28	PLAINS END, LLC	ARVADA, Jefferson, CO	Pass	State
2023-04-28	PLAINS END, LLC	ARVADA, Jefferson, CO	Pass	State
2023-04-28	WES DJ GATHERING - FREDERICK CS — high-priority violation on file	DACONO AREA, Weld, CO	Pass	State
2023-04-27	BARGATH LLC - PARACHUTE CREEK GAS PLANT	PARACHUTE 2.9 MI. NW OF, Garfield, CO	Pass	State
2023-04-27	BARGATH LLC - PARACHUTE CREEK GAS PLANT	PARACHUTE 2.9 MI. NW OF, Garfield, CO	Pass	State
2023-04-27	NYDIG DFM - SURPRISE S4 FACILITY	WALDEN AREA, Jackson, CO	Pass	State
2023-04-27	WES DJ GATHERING - FREDERICK CS — high-priority violation on file	DACONO AREA, Weld, CO	Pass	State
2023-04-26	BARGATH LLC - PARACHUTE CREEK GAS PLANT	PARACHUTE 2.9 MI. NW OF, Garfield, CO	Pass	State
2023-04-26	BARGATH LLC - PARACHUTE CREEK GAS PLANT	PARACHUTE 2.9 MI. NW OF, Garfield, CO	Pass	State
2023-04-26	NYDIG DFM - SURPRISE S4 FACILITY	WALDEN AREA, Jackson, CO	Pass	State
2023-04-26	WES DJ GATHERING - FREDERICK CS — high-priority violation on file	DACONO AREA, Weld, CO	Pass	State
2023-04-26	DCP OPERATING CO - 70 RANCH CS	KERSEY 3.3 MI. E OF, Weld, CO	Pass	State
2023-04-25	NYDIG DFM - SURPRISE S4 FACILITY	WALDEN AREA, Jackson, CO	Pass	State
2023-04-25	PLAINS END, LLC	ARVADA, Jefferson, CO	Pass	State
2023-04-25	LARAMIE ENERGY - MVS COMPRESSOR STATION	COLLBRAN 10.8 MI. E OF, Mesa, CO	Pass	State
2023-04-24	NYDIG DFM - SURPRISE S4 FACILITY	WALDEN AREA, Jackson, CO	Pass	State
2023-04-24	PLAINS END, LLC	ARVADA, Jefferson, CO	Pass	State
2023-04-21	NYDIG DFM - OXBOW PAD	WALDEN 8.8 MI. N OF, Jackson, CO	Pass	State
2023-04-21	LARAMIE ENERGY - MVS COMPRESSOR STATION	COLLBRAN 10.8 MI. E OF, Mesa, CO	Pass	State
2023-04-20	NYDIG DFM - GREGORY 0780 1-9H	WALDEN 11.2 MI. N OF, Jackson, CO	Pass	State
2023-04-20	MOLSON COORS USA - GOLDEN FACILITY	GOLDEN, Jefferson, CO	Pass	State
2023-04-20	LARAMIE ENERGY - MVS COMPRESSOR STATION	COLLBRAN 10.8 MI. E OF, Mesa, CO	Pass	State
2023-04-20	GCC RIO GRANDE - PUEBLO CEMENT PLANT — high-priority violation on file	PUEBLO 4.5 MI. S OF, Pueblo, CO	Pass	State
2023-04-20	WES DJ GATHERING - VOLLMAR C.S.	FIRESTONE AREA, Weld, CO	Pass	State
2023-04-20	WES DJ GATHERING - VOLLMAR C.S.	FIRESTONE AREA, Weld, CO	Pass	State
2023-04-19	LARAMIE ENERGY - MVS COMPRESSOR STATION	COLLBRAN 10.8 MI. E OF, Mesa, CO	Pass	State
2023-04-19	LARAMIE ENERGY - MVS COMPRESSOR STATION	COLLBRAN 10.8 MI. E OF, Mesa, CO	Pass	State
2023-04-19	WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file	FORT LUPTON, Weld, CO	Pass	State
2023-04-19	SUMMIT DJ-O OPERATING - KOKI — high-priority violation on file	JACKSON LAKE, Weld, CO	Pass	State
2023-04-19	PRAIRIE OPERATING CO - SCHLOTTHAUER PROD	FORT COLLINS AREA, Weld, CO	Pass	State
2023-04-18	LARAMIE ENERGY - MVS COMPRESSOR STATION	COLLBRAN 10.8 MI. E OF, Mesa, CO	Pass	State
2023-04-18	WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file	FORT LUPTON, Weld, CO	Pass	State
2023-04-17	WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file	FORT LUPTON, Weld, CO	Pass	State
2023-04-17	DCP OPERATING CO - MEWBOURN — high-priority violation on file	GILCREST 2.4 MI. N OF, Weld, CO	Pass	State
2023-04-14	ROCKY MOUNTAIN MIDSTREAM - WEST BRIGHTON	TODD CREEK AREA, Weld, CO	Pass	State
2023-04-14	ROCKY MOUNTAIN MIDSTREAM - WEST BRIGHTON	TODD CREEK AREA, Weld, CO	Pass	State
2023-04-13	COLLBRAN VALLEY GAS - COLLBRAN VALLEY — high-priority violation on file	COLLBRAN 2.3 MI. W OF, Mesa, CO	Pass	State
2023-04-13	COLLBRAN VALLEY GAS - COLLBRAN VALLEY — high-priority violation on file	COLLBRAN 2.3 MI. W OF, Mesa, CO	Pass	State
2023-04-13	ROCKY MOUNTAIN MIDSTREAM - WEST BRIGHTON	TODD CREEK AREA, Weld, CO	Pass	State
2023-04-13	ROCKY MOUNTAIN MIDSTREAM - WEST BRIGHTON	TODD CREEK AREA, Weld, CO	Pass	State
2023-04-12	PUBLIC SERVICE CO - CHEROKEE PLT	COMMERCE CITY AREA, Adams, CO	Pass	State
2023-04-12	CF & I STEEL L.P. DBA EVRAZ ROCKY MTN ST — high-priority violation on file	PUEBLO AREA, Pueblo, CO	Pass	State
2023-04-12	WES DJ GATHERING - LATHAM GAS PLANT	GILCREST 2.4 MI. N OF, Weld, CO	Pass	State
2023-04-11	SUNCOR ENERGY - DENVER REFINERY — high-priority violation on file	COMMERCE CITY, Adams, CO	Pending	State
2023-04-11	CF & I STEEL L.P. DBA EVRAZ ROCKY MTN ST — high-priority violation on file	PUEBLO AREA, Pueblo, CO	Pass	State
2023-04-11	WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file	FORT LUPTON, Weld, CO	Pass	State
2023-04-11	DCP OPERATING CO - MEWBOURN — high-priority violation on file	GILCREST 2.4 MI. N OF, Weld, CO	Pass	State
2023-04-11	DCP OPERATING CO - MEWBOURN — high-priority violation on file	GILCREST 2.4 MI. N OF, Weld, CO	Pass	State
2023-04-11	DCP OPERATING CO - MEWBOURN — high-priority violation on file	GILCREST 2.4 MI. N OF, Weld, CO	Pass	State
2023-04-10	DCP OPERATING CO - MEWBOURN — high-priority violation on file	GILCREST 2.4 MI. N OF, Weld, CO	Pass	State
2023-04-10	DCP OPERATING CO - MEWBOURN — high-priority violation on file	GILCREST 2.4 MI. N OF, Weld, CO	Pass	State
2023-04-10	DCP OPERATING CO - MEWBOURN — high-priority violation on file	GILCREST 2.4 MI. N OF, Weld, CO	Pass	State
2023-04-10	ROCKY MOUNTAIN MIDSTREAM - WEST BRIGHTON	TODD CREEK AREA, Weld, CO	N/A	State
2023-04-10	ROCKY MOUNTAIN MIDSTREAM - WEST BRIGHTON	TODD CREEK AREA, Weld, CO	Fail	State
2023-04-10	ROCKY MOUNTAIN MIDSTREAM - WEST BRIGHTON	TODD CREEK AREA, Weld, CO	Pass	State
2023-04-06	DCP OPERATING CO - MEWBOURN — high-priority violation on file	GILCREST 2.4 MI. N OF, Weld, CO	Pass	State
2023-04-06	DCP OPERATING CO - MEWBOURN — high-priority violation on file	GILCREST 2.4 MI. N OF, Weld, CO	Pass	State
2023-04-05	DCP OPERATING CO - MEWBOURN — high-priority violation on file	GILCREST 2.4 MI. N OF, Weld, CO	Pass	State
2023-04-05	DCP OPERATING CO - MEWBOURN — high-priority violation on file	GILCREST 2.4 MI. N OF, Weld, CO	Pass	State
2023-04-05	DCP OPERATING CO - LUCERNE 2 GAS PLANT — high-priority violation on file	GREELEY AREA, Weld, CO	Pass	State
2023-04-05	DCP OPERATING CO - LUCERNE 2 GAS PLANT — high-priority violation on file	GREELEY AREA, Weld, CO	Pass	State
2023-04-05	DCP OPERATING CO - LUCERNE 2 GAS PLANT — high-priority violation on file	GREELEY AREA, Weld, CO	Pass	State
2023-04-05	DCP OPERATING CO - LUCERNE 2 GAS PLANT — high-priority violation on file	GREELEY AREA, Weld, CO	Pass	State
2023-04-05	DCP OPERATING CO - LUCERNE 2 GAS PLANT — high-priority violation on file	GREELEY AREA, Weld, CO	Pass	State
2023-04-05	DCP OPERATING CO - LUCERNE 2 GAS PLANT — high-priority violation on file	GREELEY AREA, Weld, CO	Pass	State
2023-04-04	DCP OPERATING CO - NORTHSTAR C.S.	EATON 3.4 MI. N OF, Weld, CO	Pass	State
2023-04-04	DCP OPERATING CO - NORTHSTAR C.S.	EATON 3.4 MI. N OF, Weld, CO	Pass	State
2023-04-03	DCP OPERATING CO - MILTON C.S.	LA SALLE 8.3 MI. N OF, Weld, CO	Pass	State
2023-04-03	DCP OPERATING CO - MILTON C.S.	LA SALLE 8.3 MI. N OF, Weld, CO	Pass	State
2023-04-03	NOBLE ENERGY - Y11 WASTE MANAGEMENT ECON	KEENESBURG, Weld, CO	Pass	State
2023-03-31	CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file	LYONS AREA, Boulder, CO	Pass	State
2023-03-31	LEPRINO FOODS COMPANY - GREELEY PLANT	GREELEY, Weld, CO	Pass	State
2023-03-31	LEPRINO FOODS COMPANY - GREELEY PLANT	GREELEY, Weld, CO	Pass	State
2023-03-31	DCP OPERATING CO - MARLA C.S. — high-priority violation on file	KERSEY 7.0 MI. S OF, Weld, CO	Pass	State
2023-03-31	DCP OPERATING CO - MARLA C.S. — high-priority violation on file	KERSEY 7.0 MI. S OF, Weld, CO	Pass	State
2023-03-30	DCP OPERATING CO - 70 RANCH CS	KERSEY 3.3 MI. E OF, Weld, CO	Pass	State
2023-03-30	DCP OPERATING CO - 70 RANCH CS	KERSEY 3.3 MI. E OF, Weld, CO	Pass	State
2023-03-29	SUNCOR ENERGY - DENVER REFINERY — high-priority violation on file	COMMERCE CITY, Adams, CO	Pass	State
2023-03-29	DCP OPERATING CO - 70 RANCH CS	KERSEY 3.3 MI. E OF, Weld, CO	Pass	State
2023-03-28	DCP OPERATING CO - 70 RANCH CS	KERSEY 3.3 MI. E OF, Weld, CO	Pass	State
2023-03-28	ROCKY MT MIDSTREAM- KEENESBURG GAS PLANT	KEENESBURG, Weld, CO	Fail	State
2023-03-24	BARGATH, LLC - HYRUP PROD FACILITY — high-priority violation on file	PARACHUTE 4.3 MI. S OF, Garfield, CO	Pass	State
2023-03-23	BARGATH, LLC - HYRUP PROD FACILITY — high-priority violation on file	PARACHUTE 4.3 MI. S OF, Garfield, CO	Pass	State
2023-03-23	BARGATH, LLC - HYRUP PROD FACILITY — high-priority violation on file	PARACHUTE 4.3 MI. S OF, Garfield, CO	Pass	State
2023-03-23	WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file	FORT LUPTON, Weld, CO	Pass	State
2023-03-23	NOBLE - LD19-16 ECONODE T9N-R58W-S19 L01	RAYMER (NEW RAYMER), Weld, CO	Pass	State
2023-03-22	BARGATH, LLC - HYRUP PROD FACILITY — high-priority violation on file	PARACHUTE 4.3 MI. S OF, Garfield, CO	Pass	State
2023-03-22	BARGATH, LLC - HYRUP PROD FACILITY — high-priority violation on file	PARACHUTE 4.3 MI. S OF, Garfield, CO	Pass	State
2023-03-22	WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file	FORT LUPTON, Weld, CO	Pass	State
2023-03-22	DCP OPERATING CO - LUCERNE 2 GAS PLANT — high-priority violation on file	GREELEY AREA, Weld, CO	Pass	State
2023-03-22	DCP OPERATING CO - LUCERNE 2 GAS PLANT — high-priority violation on file	GREELEY AREA, Weld, CO	Pass	State
2023-03-21	BARGATH, LLC - HYRUP PROD FACILITY — high-priority violation on file	PARACHUTE 4.3 MI. S OF, Garfield, CO	Pass	State
2023-03-21	BARGATH, LLC - HYRUP PROD FACILITY — high-priority violation on file	PARACHUTE 4.3 MI. S OF, Garfield, CO	Pass	State
2023-03-16	PDC ENERGY - RIDGWAY 1 SEC HZ	PLATTEVILLE AREA, Weld, CO	Pass	State
2023-03-14	WES DJ GAS PROC - WATTENBERG PLANT	AURORA, Adams, CO	Pass	State
2023-03-14	NOBLE ENERGY - WELLS RANCH AA12, AE07	KERSEY 11.5 MI. NE OF, Weld, CO	Pass	State
2023-03-13	WES DJ GAS PROC - WATTENBERG PLANT	AURORA, Adams, CO	Pass	State
2023-03-08	ROCKIES EXPRESS PIPELINE-CHEYENNE HUB CS	NUNN 14.3 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.