EPA Air · stack tests by year

Air-emissions stack tests in 2026

11,110Stack tests

A stack test measures what a source actually emits, at the stack, against the limit in its permit.

States, 2026

Other years

Air-emissions stack tests recorded in 2026

Date	Facility	Where	Kind	Agency
2026-07-13	DESOTO GATHERING COMPANY, LLC - SOUTHEAST RAINBOW CPF-2	BEE BRANCH, Conway, AR	Fail	State
2026-07-13	DESOTO GATHERING COMPANY LLC - NEW QUITMAN CPF-4	QUITMAN, Faulkner, AR	Fail	State
2026-07-13	NRO - AEROSPACE DATA FACIITY (ADF-C)	AURORA, Arapahoe, CO	Pass	State
2026-07-13	NRO - AEROSPACE DATA FACIITY (ADF-C)	AURORA, Arapahoe, CO	Pass	State
2026-07-13	FAIRFIELD UNIVERSITY	FAIRFIELD, Fairfield, CT	Pending	State
2026-07-13	SOUTH FLORIDA WATER MANAGEMENT DISTRICT	LOXAHATCHEE, Palm Beach, FL	Pass	State
2026-07-13	SOUTH FLORIDA WATER MANAGEMENT DISTRICT	LOXAHATCHEE, Palm Beach, FL	Pass	State
2026-07-13	CATERPILLAR REMAN POWERTRAIN INDIANA INC	FRANKLIN, Johnson, IN	Pass	State
2026-07-13	MARKWEST LIBERTY MIDSTREAM & RESOURCES/JOHNSTON COMP STA	CANONSBURG, Washington, PA	Pass	State
2026-07-13	WCAA MIDSTREAM LLC/WEITZ SOUTH 20 COMP STA	ADAMSBURG, Westmoreland, PA	Pass	State
2026-07-13	BENEDIKT, K. PAD 1	MONTROSE, Susquehanna, PA	Pass	State
2026-07-13	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	OAK CREEK, Monroe, WI	Pass	State
2026-07-13	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	OAK CREEK, Monroe, WI	Pass	State
2026-07-13	WPL - NEENAH GENERATING FACILITY — high-priority violation on file	NEENAH, Winnebago, WI	Pass	State
2026-07-10	EXTRACTION O&G - ALMA 1S-66-2524	DENVER, Adams, CO	Pass	State
2026-07-10	NRO - AEROSPACE DATA FACIITY (ADF-C)	AURORA, Arapahoe, CO	Pass	State
2026-07-10	METALS AND ADDITIVES LLC — high-priority violation on file	BRAZIL, Clay, IN	Pass	State
2026-07-10	METALS AND ADDITIVES LLC — high-priority violation on file	BRAZIL, Clay, IN	Pass	State
2026-07-10	METALS AND ADDITIVES LLC — high-priority violation on file	BRAZIL, Clay, IN	Pass	State
2026-07-10	METALS AND ADDITIVES LLC — high-priority violation on file	BRAZIL, Clay, IN	Pass	State
2026-07-10	METALS AND ADDITIVES LLC — high-priority violation on file	BRAZIL, Clay, IN	Pass	State
2026-07-10	METALS AND ADDITIVES LLC — high-priority violation on file	BRAZIL, Clay, IN	Pass	State
2026-07-10	METALS AND ADDITIVES LLC — high-priority violation on file	BRAZIL, Clay, IN	Pass	State
2026-07-10	CARGILL INC — high-priority violation on file	HAMMOND, Lake, IN	Pass	State
2026-07-10	CARGILL INC — high-priority violation on file	HAMMOND, Lake, IN	Pass	State
2026-07-10	CARGILL INC — high-priority violation on file	HAMMOND, Lake, IN	Pass	State
2026-07-10	AJ NONWOVENS-HAMPTON, LLC	HAMPTON, Rockingham, NH	Pending	State
2026-07-10	GEORGIA-PACIFIC WAUNA LLC — high-priority violation on file	CLATSKANIE, Clatsop, OR	Pass	State
2026-07-10	GEORGIA-PACIFIC WAUNA LLC — high-priority violation on file	CLATSKANIE, Clatsop, OR	Pass	State
2026-07-10	GEORGIA-PACIFIC WAUNA LLC — high-priority violation on file	CLATSKANIE, Clatsop, OR	Pass	State
2026-07-10	GEORGIA-PACIFIC WAUNA LLC — high-priority violation on file	CLATSKANIE, Clatsop, OR	Pass	State
2026-07-10	GEORGIA-PACIFIC WAUNA LLC — high-priority violation on file	CLATSKANIE, Clatsop, OR	Pass	State
2026-07-10	COPE STATION	COPE, Orangeburg, SC	Pending	State
2026-07-10	EAST 74 RANCH CENTRAL FACILITY	CAMPBELLTON, Atascosa, TX	Pass	State
2026-07-10	EAST 74 RANCH CENTRAL FACILITY	CAMPBELLTON, Atascosa, TX	Pass	State
2026-07-10	EAST 74 RANCH CENTRAL FACILITY	CAMPBELLTON, Atascosa, TX	Pass	State
2026-07-10	EAST 74 RANCH CENTRAL FACILITY	CAMPBELLTON, Atascosa, TX	Pass	State
2026-07-10	EAST 74 RANCH CENTRAL FACILITY	CAMPBELLTON, Atascosa, TX	Pass	State
2026-07-10	EAST 74 RANCH CENTRAL FACILITY	CAMPBELLTON, Atascosa, TX	Pass	State
2026-07-10	SOUTH KARNES CENTRAL FACILITY	KENEDY, Karnes, TX	Pass	State
2026-07-10	SOUTH KARNES CENTRAL FACILITY	KENEDY, Karnes, TX	Pass	State
2026-07-10	SOUTH KARNES CENTRAL FACILITY	KENEDY, Karnes, TX	Pass	State
2026-07-10	EAST KARNES CENTRAL FACILITY	KENEDY, Karnes, TX	Pass	State
2026-07-10	AMRIZE SOUTHWEST INC.- ROCKPORT AGGREGATE FACILITY/FORMERLY UTELITE	UTAH, Undetermined, UT	Pass	State
2026-07-09	DESOTO GATHERING COMPANY, LLC - MIDGE CPF-5	HEBER SPRINGS, Cleburne, AR	Fail	State
2026-07-09	DESOTO GATHERING COMPANY, LLC - MIDGE CPF-2	PANGBURN, White, AR	Fail	State
2026-07-09	INTEL CORP - OCOTILLO CAMPUS — high-priority violation on file	MARICOPA COUNTY, Maricopa, AZ	Pending	Local
2026-07-09	CEMEX LLC - BLACK MT. QUARRY	APPLE VALLEY, San Bernardino, CA	Pass	Local
2026-07-09	CHEVRON USA INC- HEAVY OIL — high-priority violation on file	BAKERSFIELD, Kern, CA	Pass	Local
2026-07-09	CHEVRON USA INC- HEAVY OIL — high-priority violation on file	BAKERSFIELD, Kern, CA	Pass	Local
2026-07-09	CHEVRON USA INC- HEAVY OIL — high-priority violation on file	BAKERSFIELD, Kern, CA	Pass	Local
2026-07-09	CHEVRON USA INC- HEAVY OIL — high-priority violation on file	BAKERSFIELD, Kern, CA	Pass	Local
2026-07-09	CHEVRON USA INC- HEAVY OIL — high-priority violation on file	BAKERSFIELD, Kern, CA	Pass	Local
2026-07-09	CHEVRON USA INC- HEAVY OIL — high-priority violation on file	BAKERSFIELD, Kern, CA	Pass	Local
2026-07-09	CHEVRON USA INC- HEAVY OIL — high-priority violation on file	BAKERSFIELD, Kern, CA	Pass	Local
2026-07-09	CHEVRON USA INC- HEAVY OIL — high-priority violation on file	BAKERSFIELD, Kern, CA	Pass	Local
2026-07-09	CHEVRON USA INC- HEAVY OIL — high-priority violation on file	BAKERSFIELD, Kern, CA	Pass	Local
2026-07-09	CHEVRON USA INC- HEAVY OIL — high-priority violation on file	BAKERSFIELD, Kern, CA	Pass	Local
2026-07-09	CHEVRON USA INC- HEAVY OIL — high-priority violation on file	BAKERSFIELD, Kern, CA	Pass	Local
2026-07-09	CHEVRON USA INC- HEAVY OIL — high-priority violation on file	BAKERSFIELD, Kern, CA	Pass	Local
2026-07-09	CHEVRON USA INC- HEAVY OIL — high-priority violation on file	BAKERSFIELD, Kern, CA	Pass	Local
2026-07-09	EXTRACTION O&G - ALMA 1S-66-2524	DENVER, Adams, CO	Pass	State
2026-07-09	NRO - AEROSPACE DATA FACIITY (ADF-C)	AURORA, Arapahoe, CO	Pass	State
2026-07-09	MAGELLAN PIPELINE CO - FOUNTAIN TERMINAL	FOUNTAIN, El Paso, CO	N/A	State
2026-07-09	COORSTEK INC - CLEAR CREEK VALLEY PLANT — high-priority violation on file	GOLDEN AREA, Jefferson, CO	N/A	State
2026-07-09	RATHDRUM POWER LLC	RATHDRUM, Kootenai, ID	Pending	State
2026-07-09	ANR PIPELINE COMPANY SULPHUR SPRINGS COMPRESSOR STATION	SULPHUR SPRINGS, Henry, IN	Pass	State
2026-07-09	CARGILL INC — high-priority violation on file	HAMMOND, Lake, IN	Pass	State
2026-07-09	CARGILL INC — high-priority violation on file	HAMMOND, Lake, IN	Pass	State
2026-07-09	CARGILL INC — high-priority violation on file	HAMMOND, Lake, IN	Pass	State
2026-07-09	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-07-09	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-07-09	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-07-09	ASH GROVE CEMENT	CLANCY, Jefferson, MT	Pass	State
2026-07-09	ASH GROVE CEMENT	CLANCY, Jefferson, MT	Pass	State
2026-07-09	ASH GROVE CEMENT	CLANCY, Jefferson, MT	Pass	State
2026-07-09	ASH GROVE CEMENT	CLANCY, Jefferson, MT	Pass	State
2026-07-09	HEP PA GATHERING LLC/GREENZWEIG COMP STA	WYALUSING, Bradford, PA	Pass	State
2026-07-09	COTERRA ENERGY INC/ADAMS J PAD 1	KINGSLEY, Susquehanna, PA	Pass	State
2026-07-09	PAYNE, D. PAD 1	NEW MILFORD, Susquehanna, PA	Pass	State
2026-07-09	KINDER MORGAN SOUTHEAST TERMINALS LLC SPARTANBURG TERMINAL	SPARTANBURG, Spartanburg, SC	Pending	State
2026-07-09	REEVES CONSTRUCTION COMPANY - PACOLET ASPHALT PLANT	PACOLET, Spartanburg, SC	Pass	State
2026-07-09	MERSEN USA GSTN CORP.	COLUMBIA, Maury, TN	Pass	State
2026-07-09	OWENS CORNING ROOFING AND ASPHALT IRVING FACILITY	IRVING, Dallas, TX	Pass	State
2026-07-09	ASH GROVE CEMENT	MIDLOTHIAN, Ellis, TX	Pass	State
2026-07-09	QUIKRETE CONSTRUCTION MATERIALS, LLC, QUIKRETE CEMENT — high-priority violation on file	MARTINSBURG, Berkeley, WV	Fail	State
2026-07-09	APPALACHIA MIDSTREAM SERVICES, L.L.C., MOUNTAINEER COMPRESSOR	WELLSBURG, Brooke, WV	Pass	State
2026-07-09	GOFF CONNECTOR LLC, CONNECTOR STATION	BRIDGEPORT, Harrison, WV	Pass	State
2026-07-09	CNX MIDSTREAM OPERATING COMPANY LLC, MAJORSVILLE STATION	ALMA, Marshall, WV	Pass	State
2026-07-09	CKN-ROCK SPRINGS STATION (MOUNTAIN WEST PIPELINE, LLC)	SWEETWATER COUNTY, Sweetwater, WY	Pass	State
2026-07-09	CKN-ROCK SPRINGS STATION (MOUNTAIN WEST PIPELINE, LLC)	SWEETWATER COUNTY, Sweetwater, WY	Pass	State
2026-07-08	DESOTO GATHERING COMPANY, LLC - NE CHARLEY CPF-2	DRASCO, Cleburne, AR	Fail	State
2026-07-08	SOUTHWESTERN ELECTIRC POWER COMPANY - HARRY D. MATTISON POWER PLANT	TONTITOWN, Washington, AR	Pass	State
2026-07-08	NRO - AEROSPACE DATA FACIITY (ADF-C)	AURORA, Arapahoe, CO	Pass	State
2026-07-08	BONANZA CREEK - ANTELOPE CPF 13-21	KERSEY 10.4 MI. E OF, Weld, CO	Pass	State
2026-07-08	MOSAIC FERTILIZER LLC — high-priority violation on file	MULBERRY, Polk, FL	Pass	State
2026-07-08	PRIMARY PRODUCTS INGREDIENTS AMERICAS LLC	DECATUR, Macon, IL	Pass	State
2026-07-08	PRIMARY PRODUCTS INGREDIENTS AMERICAS LLC	DECATUR, Macon, IL	Pass	State
2026-07-08	METALS AND ADDITIVES LLC — high-priority violation on file	BRAZIL, Clay, IN	Pass	State
2026-07-08	METALS AND ADDITIVES LLC — high-priority violation on file	BRAZIL, Clay, IN	Pass	State

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

What this page shows

This page covers Clean Air Act facilities in the EPA air register with stack tests in 2026. It lists 11,110 stack tests recorded nationwide in 2026.