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
2023-10-03	PDC ENERGY - WIEDEMAN/BOOMERANG PAD — high-priority violation on file	GREELEY AREA, Weld, CO	Pass	State
2023-10-03	PDC ENERGY - WIEDEMAN/BOOMERANG PAD — high-priority violation on file	GREELEY AREA, Weld, CO	Fail	State
2023-10-03	PDC ENERGY - WIEDEMAN/BOOMERANG PAD — high-priority violation on file	GREELEY AREA, Weld, CO	Pass	State
2023-10-03	PDC ENERGY - WIEDEMAN/BOOMERANG PAD — high-priority violation on file	GREELEY AREA, Weld, CO	N/A	State
2023-09-27	PDC ENERGY - MCNEAR 10-9 PAD	GREELEY AREA, Weld, CO	Pass	State
2023-09-27	PDC ENERGY - MCNEAR 10-9 PAD	GREELEY AREA, Weld, CO	Pass	State
2023-09-26	AURORA CONV CENT- GAYLORD ROCKIES RESORT	AURORA, Adams, CO	Pass	State
2023-09-25	WES DJ GATHERING - FREDERICK CS — high-priority violation on file	DACONO AREA, Weld, CO	Pass	State
2023-09-23	DENVER REGIONAL/FRONT RANGE LANDFILL — high-priority violation on file	ERIE AREA, Weld, CO	Pass	State
2023-09-22	WES DJ GAS PROC - WATTENBERG PLANT	AURORA, Adams, CO	Pass	State
2023-09-22	PDC ENERGY - KIEHN & WEIS	JOHNSTOWN AREA, Weld, CO	Pass	State
2023-09-22	PDC ENERGY INC - CALIFORNIA 14 SEC HZ	EATON AREA, Weld, CO	Pass	State
2023-09-20	MOLSON COORS USA - GOLDEN FACILITY	GOLDEN, Jefferson, CO	Pass	State
2023-09-16	TRI STATE GENERATION & TRANS - CRAIG	CRAIG 2.9 MI. SW OF, Moffat, CO	N/A	State
2023-09-15	DCP OPERATING CO - CROSSROADS FACILITY	KERSEY 5.0 MI. N OF, Weld, CO	N/A	State
2023-09-15	DCP OPERATING CO - CROSSROADS FACILITY	KERSEY 5.0 MI. N OF, Weld, CO	Pass	State
2023-09-15	PDC ENERGY - EVANS 7-26 PAD	EVANS, Weld, CO	Fail	State
2023-09-14	ROCKIES EXPRESS PIPELINE-CHEYENNE HUB CS	NUNN 14.3 MI. N OF, Weld, CO	Pass	State
2023-09-14	BONANZA CREEK - STATE NORTH PLATTE T-36	KERSEY 8.3 MI. E OF, Weld, CO	Pass	State
2023-09-14	DUNAMIS ENERGY - IRISH WELL PAD	SEVERANCE 3.0 MI. N OF, Weld, CO	Pass	State
2023-09-14	PDC ENERGY - MCNEAR 10-9 PAD	GREELEY AREA, Weld, CO	Fail	State
2023-09-14	PDC ENERGY - MCNEAR 10-9 PAD	GREELEY AREA, Weld, CO	Pass	State
2023-09-14	DUNAMIS ENERGY - SASKATCHEWAN PAD	AULT AREA, Weld, CO	Pass	State
2023-09-13	CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file	LYONS AREA, Boulder, CO	Pass	State
2023-09-13	BARNARD CONST - CHIMNEY HOLLOW RESERVOIR	LOVELAND AREA, Larimer, CO	Fail	State
2023-09-13	DCP OPERATING CO - GREELEY NATURAL GAS P	EVANS AREA, Weld, CO	Pass	State
2023-09-13	DUNAMIS ENERGY - ORCA COMPRESSOR STATION	SEVERANCE 3.3 MI. N OF, Weld, CO	Pass	State
2023-09-13	DUNAMIS ENERGY - COLORADO RIVERS WELLPAD	SEVERANCE 2.4 MI. N OF, Weld, CO	Pass	State
2023-09-12	BONANZA CREEK ENERGY - ANTELOPE SECTION	KERSEY 9.2 MI. E OF, Weld, CO	Pass	State
2023-09-12	PDC ENERGY - EVANS 7-26 PAD	EVANS, Weld, CO	Fail	State
2023-09-12	PDC ENERGY - EVANS 7-26 PAD	EVANS, Weld, CO	Fail	State
2023-09-12	DUNAMIS ENERGY - ORCA COMPRESSOR STATION	SEVERANCE 3.3 MI. N OF, Weld, CO	Pass	State
2023-09-11	PDC ENERGY - EVANS 7-26 PAD	EVANS, Weld, CO	Fail	State
2023-09-11	DUNAMIS ENERGY - ALBERTA CITIES EAST PAD	SEVERANCE 3.7 MI. N OF, Weld, CO	Pass	State
2023-09-07	PHILLIPS 66 PIPELINE - DENVER TERMINAL	COMMERCE CITY, Adams, CO	Pass	State
2023-09-07	UNIV OF COLO - ANSCHUTZ MEDICAL CAMPUS	AURORA, Adams, CO	Pass	State
2023-09-06	ROCKY MOUNTAIN NAT GAS - PICEANCE	MEEKER 17.4 MI. W OF, Rio Blanco, CO	N/A	State
2023-09-06	DCP OPERATING CO - GREELEY NATURAL GAS P	EVANS AREA, Weld, CO	N/A	State
2023-09-06	DCP OPERATING CO - GREELEY NATURAL GAS P	EVANS AREA, Weld, CO	N/A	State
2023-09-06	DCP OPERATING CO - GREELEY NATURAL GAS P	EVANS AREA, Weld, CO	N/A	State
2023-09-06	DCP OPERATING CO - GREELEY NATURAL GAS P	EVANS AREA, Weld, CO	N/A	State
2023-09-06	DCP OPERATING CO - GREELEY NATURAL GAS P	EVANS AREA, Weld, CO	Pass	State
2023-09-06	DCP OPERATING CO - GREELEY NATURAL GAS P	EVANS AREA, Weld, CO	Pass	State
2023-09-06	DCP OPERATING CO - GREELEY NATURAL GAS P	EVANS AREA, Weld, CO	Pass	State
2023-09-06	DCP OPERATING CO - GREELEY NATURAL GAS P	EVANS AREA, Weld, CO	Pass	State
2023-09-05	POLARIS PRODUCTION OPCO - BIG SKY 4-11	GENOA 18.8 MI. N OF, Lincoln, CO	Pass	State
2023-09-05	DCP OPERATING CO - GREELEY NATURAL GAS P	EVANS AREA, Weld, CO	Pass	State
2023-09-05	DCP OPERATING CO - GREELEY NATURAL GAS P	EVANS AREA, Weld, CO	Pass	State
2023-09-05	DCP OPERATING CO - GREELEY NATURAL GAS P	EVANS AREA, Weld, CO	Pass	State
2023-09-05	DCP OPERATING CO - GREELEY NATURAL GAS P	EVANS AREA, Weld, CO	Pass	State
2023-08-31	DCP OPERATING CO - LUCERNE 2 GAS PLANT — high-priority violation on file	GREELEY AREA, Weld, CO	Fail	State
2023-08-30	BISON IV - TRUE RANCH FEE 2326H	NUNN 19.5 MI. N OF, Weld, CO	Pass	State
2023-08-24	SUNCOR ENERGY - DENVER REFINERY — high-priority violation on file	COMMERCE CITY, Adams, CO	Pass	State
2023-08-23	WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file	FORT LUPTON, Weld, CO	Pass	State
2023-08-21	WES DJ GAS PROC - WATTENBERG PLANT	AURORA, Adams, CO	Pass	State
2023-08-18	NRO - AEROSPACE DATA FACIITY (ADF-C)	AURORA, Arapahoe, CO	N/A	State
2023-08-18	NRO - AEROSPACE DATA FACIITY (ADF-C)	AURORA, Arapahoe, CO	Pass	State
2023-08-17	NRO - AEROSPACE DATA FACIITY (ADF-C)	AURORA, Arapahoe, CO	Pass	State
2023-08-17	NRO - AEROSPACE DATA FACIITY (ADF-C)	AURORA, Arapahoe, CO	Pass	State
2023-08-17	DCP OPERATING CO - PLATTEVILLE GPP	PLATTEVILLE AREA, Weld, CO	Pass	State
2023-08-17	DCP OPERATING CO - O'CONNOR GAS PLANT	KERSEY AREA, Weld, CO	Pass	State
2023-08-16	NRO - AEROSPACE DATA FACIITY (ADF-C)	AURORA, Arapahoe, CO	Pass	State
2023-08-16	NRO - AEROSPACE DATA FACIITY (ADF-C)	AURORA, Arapahoe, CO	Pass	State
2023-08-16	DCP OPERATING CO - O'CONNOR GAS PLANT	KERSEY AREA, Weld, CO	Pass	State
2023-08-15	NRO - AEROSPACE DATA FACIITY (ADF-C)	AURORA, Arapahoe, CO	Pass	State
2023-08-15	NRO - AEROSPACE DATA FACIITY (ADF-C)	AURORA, Arapahoe, CO	Pass	State
2023-08-15	AMRIZE PORTLAND PLANT — high-priority violation on file	FLORENCE 3.8 MI. E OF, Fremont, CO	Pass	State
2023-08-15	DCP OPERATING CO - O'CONNOR GAS PLANT	KERSEY AREA, Weld, CO	Pass	State
2023-08-15	DCP OPERATING CO - O'CONNOR GAS PLANT	KERSEY AREA, Weld, CO	Pass	State
2023-08-15	SPELLBOUND ENERGY - AKBARY / 1A PAD	NUNN AREA, Weld, CO	Pass	State
2023-08-15	PRAIRIE OPERATING - SIMPSON 36-1H	PIERCE AREA, Weld, CO	Pass	State
2023-08-15	SPELLBOUND ENERGY - DEPORTER / 29-A	CARR AREA, Weld, CO	Pass	State
2023-08-14	NRO - AEROSPACE DATA FACIITY (ADF-C)	AURORA, Arapahoe, CO	N/A	State
2023-08-10	PRAIRIE OPERATING CO - MEAD TANK BATTERY	AULT AREA, Weld, CO	Pass	State
2023-08-09	NRO - AEROSPACE DATA FACIITY (ADF-C)	AURORA, Arapahoe, CO	Pass	State
2023-08-09	TEP ROCKY MTN- BAILEY COMPRESSOR STATION	SILT 2.2 MI. S OF, Garfield, CO	Pass	State
2023-08-09	TEP ROCKY MTN- BAILEY COMPRESSOR STATION	SILT 2.2 MI. S OF, Garfield, CO	Pass	State
2023-08-09	TEP ROCKY MTN- BAILEY COMPRESSOR STATION	SILT 2.2 MI. S OF, Garfield, CO	Pass	State
2023-08-09	TEP ROCKY MTN- BAILEY COMPRESSOR STATION	SILT 2.2 MI. S OF, Garfield, CO	Pass	State
2023-08-09	TEP ROCKY MTN- BAILEY COMPRESSOR STATION	SILT 2.2 MI. S OF, Garfield, CO	Pass	State
2023-08-09	BAYSWATER E&P - LEFFLER 13, 14, 23, 24-2	AULT AREA, Weld, CO	N/A	State
2023-08-09	BAYSWATER E&P - LEFFLER 13, 14, 23, 24-2	AULT AREA, Weld, CO	N/A	State
2023-08-09	PRAIRIE OPERATING CO - G&D HANKS TANK	EATON AREA, Weld, CO	Pass	State
2023-08-08	NRO - AEROSPACE DATA FACIITY (ADF-C)	AURORA, Arapahoe, CO	Pass	State
2023-08-08	PRAIRIE OPERATING - BOOTH 8-7HZ TANK	GREELEY AREA, Weld, CO	Pass	State
2023-08-07	PRAIRIE OPERATING - CALVARY FARMS NORTH	EATON AREA, Weld, CO	N/A	State
2023-08-07	PRAIRIE OPERATING CO - CALVARY FARMS S	EATON AREA, Weld, CO	Pass	State
2023-08-03	ENTERPRISE PRODUCTS OP- JACKRABBIT CS	PARACHUTE 9.5 MI. NW OF, Garfield, CO	Pass	State
2023-08-03	ENTERPRISE PRODUCTS OP- JACKRABBIT CS	PARACHUTE 9.5 MI. NW OF, Garfield, CO	Pass	State
2023-08-03	ENTERPRISE PRODUCTS OP- JACKRABBIT CS	PARACHUTE 9.5 MI. NW OF, Garfield, CO	Pass	State
2023-08-02	PLATTE RIVER POWER AUTHORITY - RAWHIDE	WELLINGTON 9.3 MI. N OF, Larimer, CO	Pass	State
2023-08-01	TEP ROCKY MTN - PARACHUTE WMF	PARACHUTE AREA, Garfield, CO	Pass	State
2023-08-01	PLATTE RIVER POWER AUTHORITY - RAWHIDE	WELLINGTON 9.3 MI. N OF, Larimer, CO	Pass	State
2023-08-01	SPINDLE HILL ENERGY, LLC	FREDERICK, Weld, CO	N/A	State
2023-07-31	ENTERPRISE PRODUCTS OP- JACKRABBIT CS	PARACHUTE 9.5 MI. NW OF, Garfield, CO	Pass	State
2023-07-31	ENTERPRISE PRODUCTS OP- JACKRABBIT CS	PARACHUTE 9.5 MI. NW OF, Garfield, CO	Pass	State
2023-07-28	PUBLIC SERVICE CO - HAYDEN PLT	HAYDEN, Routt, CO	Pass	State
2023-07-25	DCP OPERATING CO - ENTERPRISE C.S. — high-priority violation on file	KEENESBURG 5.2 MI. N OF, Weld, CO	Pass	State
2023-07-24	AMRIZE PORTLAND PLANT — high-priority violation on file	FLORENCE 3.8 MI. E OF, Fremont, CO	Fail	State
2023-07-24	DCP OPERATING CO - ENTERPRISE C.S. — high-priority violation on file	KEENESBURG 5.2 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.