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
2023-03-07	ROCKIES EXPRESS PIPELINE-CHEYENNE HUB CS	NUNN 14.3 MI. N OF, Weld, CO	Pass	State
2023-03-07	ROCKIES EXPRESS PIPELINE-CHEYENNE HUB CS	NUNN 14.3 MI. N OF, Weld, CO	Pass	State
2023-03-06	ROCKIES EXPRESS PIPELINE-CHEYENNE HUB CS	NUNN 14.3 MI. N OF, Weld, CO	Pass	State
2023-03-06	ROCKIES EXPRESS PIPELINE-CHEYENNE HUB CS	NUNN 14.3 MI. N OF, Weld, CO	Pass	State
2023-02-27	TEP ROCKY MOUNTAIN - JIMMY GULCH STATION	MEEKER 23.1 MI. SW OF, Rio Blanco, CO	Pass	State
2023-02-23	EVERGREEN NATURAL RESOURCES - RITA CANYO	COKEDALE 7.0 MI. SW OF, Las Animas, CO	Pass	State
2023-02-23	EVERGREEN NATURAL RESOURCES - RITA CANYO	COKEDALE 7.0 MI. SW OF, Las Animas, CO	Pass	State
2023-02-21	EVERGREEN NATURAL RESOURCES- MAXWELL C.S	COKEDALE 14.9 MI. W OF, Las Animas, CO	Pass	State
2023-02-21	EVERGREEN NATURAL RESOURCES- MAXWELL C.S	COKEDALE 14.9 MI. W OF, Las Animas, CO	Pass	State
2023-02-21	NORTHWEST PIPELINE - RANGELY C.S.	RANGELY, Rio Blanco, CO	Pass	State
2023-02-14	AMRIZE PORTLAND PLANT — high-priority violation on file	FLORENCE 3.8 MI. E OF, Fremont, CO	Pass	State
2023-02-14	NOBLE ENERGY - TIMBRO STATE LD16 ECONODE	RAYMER (NEW RAYMER) 9.7 MI. N, Weld, CO	Pass	State
2023-02-14	NOBLE ENERGY - LC25 ECONODE T9N-59W-S25	RAYMER 8.4 MI. NW OF, Weld, CO	Pass	State
2023-02-13	TEP ROCKY MTN - CLOUGH PRODUCTION	RIFLE AREA, Garfield, CO	Pass	State
2023-02-09	PDC ENERGY - HARVESTERS STATE 7-15	GREELEY AREA, Weld, CO	Pass	State
2023-02-06	SUMMIT DJ-O OPERATING - KOKI — high-priority violation on file	JACKSON LAKE, Weld, CO	Pass	State
2023-01-31	SUMMIT MIDSTREAM NIOBR - ANGUS COMPR STN	GROVER 8.8 MI. N OF, Weld, CO	Pass	State
2023-01-31	SUMMIT MIDSTREAM NIOBR - ANGUS COMPR STN	GROVER 8.8 MI. N OF, Weld, CO	Pass	State
2023-01-25	ROCKY MOUNTAIN MIDSTREAM - LOCHBUIE C.S.	LOCHBUIE AREA, Weld, CO	Pass	State
2023-01-24	PUBLIC SERVICE CO - ROUNDUP STATION	WIGGINS 6.6 MI. S OF, Morgan, CO	N/A	State
2023-01-24	PUBLIC SERVICE CO - ROUNDUP STATION	WIGGINS 6.6 MI. S OF, Morgan, CO	Pass	State
2023-01-24	ROCKY MOUNTAIN MIDSTREAM - LOCHBUIE C.S.	LOCHBUIE AREA, Weld, CO	Pass	State
2023-01-24	ROCKY MOUNTAIN MIDSTREAM - LOCHBUIE C.S.	LOCHBUIE AREA, Weld, CO	Pass	State
2023-01-24	NOBLE ENERGY - WELLS RANCH STATE BB03	KERSEY, Weld, CO	Pass	State
2023-01-23	PUBLIC SERVICE CO - ROUNDUP STATION	WIGGINS 6.6 MI. S OF, Morgan, CO	Pass	State
2023-01-19	PDC ENERGY - WIEDEMAN/BOOMERANG PAD — high-priority violation on file	GREELEY AREA, Weld, CO	Pass	State
2023-01-19	PDC ENERGY - MCGLOTHLIN 9 SEC HZ	KERSEY AREA, Weld, CO	Pass	State
2023-01-17	KERR-MCGEE GATHERING - IONE C.S.	PLATTEVILLE 3.5 MI. SE OF, Weld, CO	Pass	State
2023-01-16	AMRIZE PORTLAND PLANT — high-priority violation on file	FLORENCE 3.8 MI. E OF, Fremont, CO	Pass	State
2023-01-11	SUMMIT DJ-S - GROVER COMPRESSOR STATION	GROVER 11.4 MI. SE OF, Weld, CO	Pass	State
2023-01-10	DENVER REGIONAL/FRONT RANGE LANDFILL — high-priority violation on file	ERIE AREA, Weld, CO	Pass	State
2023-01-10	DCP OPERATING CO - ENTERPRISE C.S. — high-priority violation on file	KEENESBURG 5.2 MI. N OF, Weld, CO	Pass	State
2023-01-10	DCP OPERATING CO - ENTERPRISE C.S. — high-priority violation on file	KEENESBURG 5.2 MI. N OF, Weld, CO	Pass	State
2023-01-10	DCP OPERATING CO - ENTERPRISE C.S. — high-priority violation on file	KEENESBURG 5.2 MI. N OF, Weld, CO	Pass	State
2023-01-04	NOBLE ENERGY - LC34 ECONODE T9N-R59W-S34	RAYMER 9.1 MI. NW OF, Weld, CO	Pass	State
2023-01-03	BONANZA CREEK - STATE PRONGHORN CPF 41-3	WIGGINS 11.6 MI. NW OF, Weld, CO	Pass	State

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