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
2021-10-04	DCP OPERATING CO - O'CONNOR GAS PLANT	KERSEY AREA, Weld, CO	Pass	State
2021-10-04	SIMCOE - MIERA CENTRAL DELIVERY POINT	LA PLATA COUNTY, La Plata, CO	Pass	U.S. EPA
2021-09-29	COLORADO INTERSTATE GAS CO - GREASEWOOD	MEEKER 16.5 MI. SW OF, Rio Blanco, CO	Pass	State
2021-09-29	RED CEDAR GATHERING COMPANY - SOUTH IGNACIO CENTRAL DEL	SOUTHERN UTE RESERVATION, La Plata, CO	Pass	State
2021-09-28	WYOMING INTERSTATE - SNAKE RIVER C.S.	CRAIG 37.2 MI. NW OF, Moffat, CO	Pass	State
2021-09-28	WYOMING INTERSTATE - SNAKE RIVER C.S.	CRAIG 37.2 MI. NW OF, Moffat, CO	Pass	State
2021-09-24	SUMMIT PRESSED BRICK - BRICK MFG PLT	PUEBLO, Pueblo, CO	Pass	State
2021-09-23	SUNCOR ENERGY - DENVER REFINERY — high-priority violation on file	COMMERCE CITY, Adams, CO	Pass	State
2021-09-23	SUMMIT MIDSTREAM NIOBR - ANGUS COMPR STN	GROVER 8.8 MI. N OF, Weld, CO	Pass	State
2021-09-23	SUMMIT MIDSTREAM NIOBR - ANGUS COMPR STN	GROVER 8.8 MI. N OF, Weld, CO	Pass	State
2021-09-23	ASPHALT SPECIALTIES - ROAD 6 ASPHALT PLA	ERIE, Weld, CO	Pass	State
2021-09-22	SUMMIT MIDSTREAM NIOBR - HEREFORD RANCH	GROVER 11.0 MI. NW OF, Weld, CO	Pass	State
2021-09-22	SUMMIT MIDSTREAM NIOBR - ANGUS COMPR STN	GROVER 8.8 MI. N OF, Weld, CO	Pass	State
2021-09-22	RED WILLOW PRODUCTION COMPANY - HOWARD SALTWATER DIS	BAYFIELD, La Plata, CO	Pass	State
2021-09-16	AMERICAN GYPSUM COMPANY	GYPSUM, Eagle, CO	Pass	State
2021-09-16	AMERICAN GYPSUM COMPANY	GYPSUM, Eagle, CO	Pass	State
2021-09-16	AMERICAN GYPSUM COMPANY	GYPSUM, Eagle, CO	Pass	State
2021-09-16	AMERICAN GYPSUM COMPANY	GYPSUM, Eagle, CO	Pass	State
2021-09-16	AMERICAN GYPSUM COMPANY	GYPSUM, Eagle, CO	Pass	State
2021-09-16	SUMMIT COUNTY LANDFILL	DILLON AREA, Summit, CO	Pass	State
2021-09-15	AMERICAN GYPSUM COMPANY	GYPSUM, Eagle, CO	Pass	State
2021-09-15	RED CEDAR GATHERING COMPANY - PONDEROSA COMPRESSOR STATION	DURANGO, La Plata, CO	Pass	State
2021-09-15	RED CEDAR GATHERING COMPANY - PONDEROSA COMPRESSOR STATION	DURANGO, La Plata, CO	Pass	State
2021-09-14	AMERICAN GYPSUM COMPANY	GYPSUM, Eagle, CO	Pass	State
2021-09-14	AMERICAN GYPSUM COMPANY	GYPSUM, Eagle, CO	Pass	State
2021-09-14	DCP OPERATING CO - ENTERPRISE C.S. — high-priority violation on file	KEENESBURG 5.2 MI. N OF, Weld, CO	Pass	State
2021-09-10	SIMCOE - IRON HORSE CENTRAL DELIVERY POINT	SOUTHERN UTE RESERVATION, La Plata, CO	Pass	State
2021-09-09	WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file	FORT LUPTON, Weld, CO	Pass	State
2021-09-09	SIMCOE - WOLF POINT CENTRAL DELIVERY POINT	LA PLATA COUNTY, La Plata, CO	Pass	U.S. EPA
2021-09-07	WEXPRO CO - POWDER WASH	CRAIG 47.7 MI. NW OF, Moffat, CO	Pass	State
2021-09-03	BONANZA CREEK - STATE NORTH PLATTE T-36	KERSEY 8.3 MI. E OF, Weld, CO	Fail	State
2021-09-02	BONANZA CREEK - STATE NORTH PLATTE T-36	KERSEY 8.3 MI. E OF, Weld, CO	Fail	State
2021-09-02	BONANZA CREEK - STATE NORTH PLATTE T-36	KERSEY 8.3 MI. E OF, Weld, CO	Fail	State
2021-09-02	BONANZA CREEK - STATE NORTH PLATTE T-36	KERSEY 8.3 MI. E OF, Weld, CO	Fail	State
2021-09-01	DCP OPERATING CO - LUCERNE 2 GAS PLANT — high-priority violation on file	GREELEY AREA, Weld, CO	Pass	State
2021-08-31	AMRIZE PORTLAND PLANT — high-priority violation on file	FLORENCE 3.8 MI. E OF, Fremont, CO	Pass	State
2021-08-31	AMRIZE PORTLAND PLANT — high-priority violation on file	FLORENCE 3.8 MI. E OF, Fremont, CO	Pass	State
2021-08-26	RED CEDAR GATHERING COMPANY - TRAIL CANYON COMPRESSOR STATION	SOUTHERN UTE RESERVATION, La Plata, CO	Pass	State
2021-08-25	BARGATH LLC - PARACHUTE CREEK GAS PLANT	PARACHUTE 2.9 MI. NW OF, Garfield, CO	Pass	State
2021-08-25	DCP OPERATING CO - GODFREY BOTTOM C.S.	EVANS AREA, Weld, CO	Pass	State
2021-08-25	DCP OPERATING CO - GODFREY BOTTOM C.S.	EVANS AREA, Weld, CO	Pass	State
2021-08-25	RED CEDAR GATHERING COMPANY - SPRING CREEK COMPRESSOR STATION	IGNACIO, La Plata, CO	Pass	State
2021-08-24	WES DJ GAS PROC - WATTENBERG PLANT	AURORA, Adams, CO	Pass	State
2021-08-24	BARGATH LLC - PARACHUTE CREEK GAS PLANT	PARACHUTE 2.9 MI. NW OF, Garfield, CO	Pass	State
2021-08-24	BARGATH LLC - PARACHUTE CREEK GAS PLANT	PARACHUTE 2.9 MI. NW OF, Garfield, CO	Pass	State
2021-08-24	GRAND RIVER GATHERING - PUMBA CS	RIFLE 3.4 MI. S OF, Garfield, CO	Pass	State
2021-08-24	DCP OPERATING CO - CROSSROADS FACILITY	KERSEY 5.0 MI. N OF, Weld, CO	Pass	State
2021-08-23	GRAND RIVER GATHERING - PUMBA CS	RIFLE 3.4 MI. S OF, Garfield, CO	Pass	State
2021-08-23	DCP OPERATING CO - ROCKY TURBINE CS	KERSEY 8.6 MI. NE OF, Weld, CO	Pass	State
2021-08-23	DCP OPERATING CO - ROCKY TURBINE CS	KERSEY 8.6 MI. NE OF, Weld, CO	Pass	State
2021-08-23	DCP OPERATING CO - CROSSROADS FACILITY	KERSEY 5.0 MI. N OF, Weld, CO	Pass	State
2021-08-20	SUNCOR ENERGY - DENVER REFINERY — high-priority violation on file	COMMERCE CITY, Adams, CO	N/A	State
2021-08-19	ASPHALT SPECIALTIES - 62ND AVE	NORTH WASHINGTON, Adams, CO	Pass	State
2021-08-19	GRAND RIVER GATHERING - HUNTER MESA CS	RIFLE 3.3 MI. SE OF, Garfield, CO	Pass	State
2021-08-19	GRAND RIVER GATHERING - HUNTER MESA CS	RIFLE 3.3 MI. SE OF, Garfield, CO	Pass	State
2021-08-19	KERR-MCGEE - MUSTANG 44-22 PRODUCTION	KERSEY 8.6 MI. N OF, Weld, CO	Fail	State
2021-08-19	RED CEDAR GATHERING COMPANY - SAMBRITO COMPRESSOR STATION	SOUTHERN UTE RESERVATION, La Plata, CO	Pass	State
2021-08-18	GRAND RIVER GATHERING - HUNTER MESA CS	RIFLE 3.3 MI. SE OF, Garfield, CO	Pass	State
2021-08-17	FIVE PART DEVELOPMENT- EAST REGIONAL	AURORA 3.6 MI. NE OF, Adams, CO	Fail	State
2021-08-17	GRAND RIVER GATHERING - HUNTER MESA CS	RIFLE 3.3 MI. SE OF, Garfield, CO	Pass	State
2021-08-17	KERR MCGEE - MUSTANG Y-34 PRODUCTION FAC	KEENESBURG 10.3 MI. N OF, Weld, CO	Pass	State
2021-08-16	SUNCOR ENERGY - DENVER REFINERY — high-priority violation on file	COMMERCE CITY, Adams, CO	Pass	State
2021-08-16	SUNCOR ENERGY - DENVER REFINERY — high-priority violation on file	COMMERCE CITY, Adams, CO	Pass	State
2021-08-16	GRAND RIVER GATHERING - HUNTER MESA CS	RIFLE 3.3 MI. SE OF, Garfield, CO	Pass	State
2021-08-16	BONANZA CREEK - LONGHORN U-10 PROD FAC	KEENESBURG 9.3 MI. N OF, Weld, CO	Fail	State
2021-08-12	CRIPPLE CREEK & VICTOR - CRESSON PROJECT	CRIPPLE CREEK AREA, Teller, CO	Pass	State
2021-08-11	NOBLE ENERGY - WELLS RANCH AA24, AA23, B	KERSEY 9.4 MI. NE OF, Weld, CO	Pass	State
2021-08-10	BONANZA CREEK - ANTELOPE CPF 13-21	KERSEY 10.4 MI. E OF, Weld, CO	Pass	State
2021-08-04	ENTERPRISE PRODUCTS OP- JACKRABBIT CS	PARACHUTE 9.5 MI. NW OF, Garfield, CO	Pass	State
2021-08-04	ENTERPRISE PRODUCTS OP- JACKRABBIT CS	PARACHUTE 9.5 MI. NW OF, Garfield, CO	Pass	State
2021-08-04	MOLSON COORS USA LLC - GOLDEN BREWERY — high-priority violation on file	GOLDEN AREA, Jefferson, CO	Pass	State
2021-08-04	MOLSON COORS USA LLC - GOLDEN BREWERY — high-priority violation on file	GOLDEN AREA, Jefferson, CO	Pass	State
2021-08-04	MOLSON COORS USA LLC - GOLDEN BREWERY — high-priority violation on file	GOLDEN AREA, Jefferson, CO	Pass	State
2021-08-04	MOLSON COORS USA LLC - GOLDEN BREWERY — high-priority violation on file	GOLDEN AREA, Jefferson, CO	Pass	State
2021-08-04	MOLSON COORS USA LLC - GOLDEN BREWERY — high-priority violation on file	GOLDEN AREA, Jefferson, CO	Pass	State
2021-08-04	MOLSON COORS USA LLC - GOLDEN BREWERY — high-priority violation on file	GOLDEN AREA, Jefferson, CO	Pass	State
2021-08-03	ENTERPRISE PRODUCTS OP- JACKRABBIT CS	PARACHUTE 9.5 MI. NW OF, Garfield, CO	Pass	State
2021-08-03	ENTERPRISE PRODUCTS OP- JACKRABBIT CS	PARACHUTE 9.5 MI. NW OF, Garfield, CO	Pass	State
2021-08-03	ENTERPRISE PRODUCTS OP- JACKRABBIT CS	PARACHUTE 9.5 MI. NW OF, Garfield, CO	Pass	State
2021-08-02	SIMCOE - MIERA CENTRAL DELIVERY POINT	LA PLATA COUNTY, La Plata, CO	Pass	U.S. EPA
2021-07-30	FULCRUM ENERGY - OXBOW 0880 S29	WALDEN 8.9 MI. N OF, Jackson, CO	Fail	State
2021-07-30	WILLIAMS FRONT RANGE - TIGER COMPRESSOR	HUDSON, Weld, CO	Pass	State
2021-07-29	FULCRUM ENERGY - OXBOW 0880 S29	WALDEN 8.9 MI. N OF, Jackson, CO	Fail	State
2021-07-29	WES DJ GATHERING - FREDERICK CS — high-priority violation on file	DACONO AREA, Weld, CO	Pass	State
2021-07-29	WES DJ GATHERING - FREDERICK CS — high-priority violation on file	DACONO AREA, Weld, CO	Pass	State
2021-07-29	REP PROCESSING LLC - PIERCE GAS PLANT	PIERCE, Weld, CO	Pass	State
2021-07-28	FULCRUM ENERGY - OXBOW 0880 S29	WALDEN 8.9 MI. N OF, Jackson, CO	Fail	State
2021-07-28	TEP ROCKY MOUNTAIN - JIMMY GULCH STATION	MEEKER 23.1 MI. SW OF, Rio Blanco, CO	N/A	State
2021-07-27	FULCRUM ENERGY - OXBOW 0880 S29	WALDEN 8.9 MI. N OF, Jackson, CO	Fail	State
2021-07-26	TEP ROCKY MOUNTAIN - CASTLE SPRINGS C.S.	SILT 6.7 MI. SE OF, Garfield, CO	Pass	State
2021-07-26	TEP ROCKY MOUNTAIN - CASTLE SPRINGS C.S.	SILT 6.7 MI. SE OF, Garfield, CO	Pass	State
2021-07-26	FULCRUM ENERGY - OXBOW 0880 S29	WALDEN 8.9 MI. N OF, Jackson, CO	Fail	State
2021-07-26	FULCRUM ENERGY - OXBOW 0880 S29	WALDEN 8.9 MI. N OF, Jackson, CO	Fail	State
2021-07-23	ASPHALT SPECIALTIES CO INC- OXFORD PLANT	SHERIDAN AREA, Arapahoe, CO	Pass	State
2021-07-21	BARGATH - RABBIT BRUSH C.S.	PARACHUTE AREA, Garfield, CO	Pass	State
2021-07-21	HARVEST FOUR CORNERS, LLC - IGNACIO GAS PLANT	DURANGO, La Plata, CO	Pass	State
2021-07-20	GCC RIO GRANDE - PUEBLO CEMENT PLANT — high-priority violation on file	PUEBLO 4.5 MI. S OF, Pueblo, CO	Pass	State
2021-07-20	HARVEST FOUR CORNERS, LLC - IGNACIO GAS PLANT	DURANGO, La Plata, CO	Pass	State
2021-07-13	ROCKIES EXPRESS PIPELINE-CHEYENNE HUB CS	NUNN 14.3 MI. N OF, Weld, CO	Pass	State
2021-07-09	CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file	LYONS AREA, Boulder, CO	Pass	State

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