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
2026-01-08	BLACK HAWK/BLACK CAT 16 STATE COM CTB	ATOKA, Eddy, NM	Pass	State
2026-01-08	LIMESTONE COMPRESSOR STATION	JAL, Lea, NM	Pass	State
2026-01-08	LIMESTONE COMPRESSOR STATION	JAL, Lea, NM	Pass	State
2026-01-08	ENERGY TRANSFER COMPANY - DOMINATOR COMPRESSOR STATION	JAL, Lea, NM	Pass	State
2026-01-08	ANGUS STATE TB	JAL, Lea, NM	Pass	State
2026-01-08	HELIOS COMPRESSOR STATION	JAL, Lea, NM	Pass	State
2026-01-08	HELIOS COMPRESSOR STATION	JAL, Lea, NM	Pass	State
2026-01-08	CATHY BRYCE TB	JAL, Lea, NM	Pass	State
2026-01-08	PABCO GYPSUM	LAS VEGAS, Clark, NV	Pass	Local
2026-01-08	NYU LANGONE MEDICAL CENTER	NEW YORK, New York, NY	Pass	State
2026-01-08	REGENCY MARCELLUS GAS GATHERING LLC/QUAKER STATE RD COMP STA	MONTOURSVILLE, Lycoming, PA	Pass	State
2026-01-08	WILLIAMS FIELD SVC CO LLC/GIBSON COMP STA	SOUTH GIBSON, Susquehanna, PA	Pass	State
2026-01-08	ADELPHIA GATEWAY LLC/MARCUS HOOK COMPRESSOR STA	LINWOOD, Delaware, PA	Pass	State
2026-01-08	SWN ENERGY PROD CO/SEYMOUR PAD	LAWTON, Bradford, PA	Pass	State
2026-01-08	QUIKRETE CONSTRUCTION MATERIALS, LLC — high-priority violation on file	HARLEYVILLE, Dorchester, SC	Pass	State
2026-01-08	CAROLINA GAS TRANSMISSION LLC - BETHUNE COMPRESSOR STATION	BETHUNE, Kershaw, SC	Pass	State
2026-01-08	U.S. SILICA COMPANY,	MIDDLETON, Hardeman, TN	Pass	State
2026-01-08	WESTROCK TEXAS	EVADALE, Jasper, TX	Pass	State
2026-01-07	SOUTHERN NATURAL GAS	SELMA, Dallas, AL	Pass	State
2026-01-07	BUNGE NORTH AMERICA, INC.	DECATUR, Morgan, AL	Pass	State
2026-01-07	GROOMS ALUMINUM PROCESSING — high-priority violation on file	ASHVILLE, St. Clair, AL	Pass	State
2026-01-07	CARMEUSE LIME & STONE INC	SAGINAW, Shelby, AL	Pass	State
2026-01-07	CARMEUSE LIME & STONE INC	SAGINAW, Shelby, AL	Pass	State
2026-01-07	CARMEUSE LIME & STONE INC	SAGINAW, Shelby, AL	Pass	State
2026-01-07	SOUTHERN NATURAL GAS	NORTHPORT, Tuscaloosa, AL	Pass	State
2026-01-07	DESOTO GATHERING COMPANY, LLC - NEW QUITMAN CPF-3	QUITMAN, Cleburne, AR	Pass	State
2026-01-07	ENABLE GAS TRANSMISSION, LLC - (ROUND MOUNTAIN COMPRESSOR STATION)	LANTY, Conway, AR	Pass	State
2026-01-07	ENABLE GAS TRANSMISSION, LLC - (ROUND MOUNTAIN COMPRESSOR STATION)	LANTY, Conway, AR	Pass	State
2026-01-07	DESOTO GATHERING COMPANY, LLC - NEW QUITMAN CPF-1	QUITMAN, Faulkner, AR	Pass	State
2026-01-07	LIGNETICS OF AR AND MO, LLC	MOUNTAIN VIEW, Stone, AR	Pass	State
2026-01-07	LIGNETICS OF AR AND MO, LLC	MOUNTAIN VIEW, Stone, AR	Pass	State
2026-01-07	SENTINEL PEAK RESOURCES CA LLC — high-priority violation on file	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	SENTINEL PEAK RESOURCES CA LLC — high-priority violation on file	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CHEVRON COGENERATION COMPANY	BAKERSFIELD, Kern, CA	Pass	Local
2026-01-07	CRESTONE PEAK - ESTRN HILLS 4-65 17-18 S	AURORA, Arapahoe, CO	Pass	State
2026-01-07	CRESTONE PEAK - ESTRN HILLS 4-65 17-18 S	AURORA, Arapahoe, CO	Pass	State
2026-01-07	NOBLE ENERGY - NCLP AA06, AA07 MAHALO ST — high-priority violation on file	KERSEY 9.8 MI. NE OF, Weld, CO	Pass	State
2026-01-07	BOEHRINGER INGELHEIM PHARMACEUTICALS INC	RIDGEFIELD, Fairfield, CT	Pass	State
2026-01-07	BOEHRINGER INGELHEIM PHARMACEUTICALS INC	RIDGEFIELD, Fairfield, CT	Pass	State
2026-01-07	SWISS CLEANERS	ROCKVILLE, Tolland, CT	Pending	State
2026-01-07	ARMED FORCES RETIREMENT HOME — high-priority violation on file	WASHINGTON, District of Columbia, DC	Pass	State
2026-01-07	GALLAUDET UNIVERSITY — high-priority violation on file	WASHINGTON, District of Columbia, DC	Incomplete	State
2026-01-07	GALLAUDET UNIVERSITY — high-priority violation on file	WASHINGTON, District of Columbia, DC	Incomplete	State
2026-01-07	CMC STEEL US, LLC	JACKSONVILLE, Duval, FL	Pass	State
2026-01-07	OSCEOLA FARMS	PAHOKEE, Palm Beach, FL	Pass	State
2026-01-07	OSCEOLA FARMS	PAHOKEE, Palm Beach, FL	Pass	State
2026-01-07	OSCEOLA FARMS	PAHOKEE, Palm Beach, FL	Pass	State
2026-01-07	OSCEOLA FARMS	PAHOKEE, Palm Beach, FL	Pass	State
2026-01-07	OSCEOLA FARMS	PAHOKEE, Palm Beach, FL	Pass	State
2026-01-07	OSCEOLA FARMS	PAHOKEE, Palm Beach, FL	Pass	State
2026-01-07	OSCEOLA FARMS	PAHOKEE, Palm Beach, FL	Pass	State
2026-01-07	LX HAUSYS AMERICA, INC. — high-priority violation on file	ADAIRSVILLE, Gordon, GA	Fail	State
2026-01-07	LX HAUSYS AMERICA, INC. — high-priority violation on file	ADAIRSVILLE, Gordon, GA	Pass	State
2026-01-07	WASHINGTON COUNTY ENERGY FACILITY	SANDERSVILLE, Washington, GA	Pass	State
2026-01-07	WASHINGTON COUNTY ENERGY FACILITY	SANDERSVILLE, Washington, GA	Pass	State
2026-01-07	HEALTHY PET — high-priority violation on file	JESUP, Wayne, GA	Pass	State
2026-01-07	HEALTHY PET — high-priority violation on file	JESUP, Wayne, GA	Pass	State
2026-01-07	HEALTHY PET — high-priority violation on file	JESUP, Wayne, GA	Pass	State
2026-01-07	HEALTHY PET — high-priority violation on file	JESUP, Wayne, GA	Pass	State
2026-01-07	HEALTHY PET — high-priority violation on file	JESUP, Wayne, GA	Pass	State
2026-01-07	GOLDEN GRAIN ENERGY LLC — high-priority violation on file	MASON CITY, Cerro Gordo, IA	Fail	State
2026-01-07	PLYMOUTH ENERGY LLC	MERRILL, Plymouth, IA	Pass	State
2026-01-07	PLYMOUTH ENERGY LLC	MERRILL, Plymouth, IA	Pass	State
2026-01-07	MIDWEST ENERGY - HAYS (GOODMAN ENERGY CENTER)(AIR)	HAYS, Ellis, KS	Pass	State
2026-01-07	EVERGY, INC. - JEFFREY ENERGY CENTER (AIR)	ST. MARY'S, Pottawatomie, KS	Pass	State
2026-01-07	CF INDUSTRIES NITROGEN LLC - DONALDSONVILLE NITROGEN COMPLEX	DONALDSONVILLE, Ascension, LA	Pass	State
2026-01-07	CF INDUSTRIES NITROGEN LLC - DONALDSONVILLE NITROGEN COMPLEX	DONALDSONVILLE, Ascension, LA	Pass	State
2026-01-07	SHADY GROVE ADVENTIST HOSPITAL	ROCKVILLE, Montgomery, MD	Pass	State
2026-01-07	WILLISTON BASIN - HATHAWAY STATION	HATHAWAY, Rosebud, MT	Pass	State
2026-01-07	WILLISTON BASIN - HATHAWAY STATION	HATHAWAY, Rosebud, MT	Pass	State
2026-01-07	WILLISTON BASIN - LITTLE BEAVER	BAKER, Fallon, MT	Pass	State
2026-01-07	WILLISTON BASIN - LITTLE BEAVER	BAKER, Fallon, MT	Pass	State
2026-01-07	WILLISTON BASIN - CABIN CREEK	BAKER, Fallon, MT	Pass	State
2026-01-07	WILLISTON BASIN - CABIN CREEK	BAKER, Fallon, MT	Pass	State
2026-01-07	BILLINGS REFINERY	BILLINGS, Yellowstone, MT	Pass	State
2026-01-07	DUKE ENERGY CAROLINAS, LLC - BELEWS CREEK STEAM STATION	BELEWS CREEK, Stokes, NC	Pass	State
2026-01-07	UNION PACIFIC RAILROAD — high-priority violation on file	NORTH PLATTE, Lincoln, NE	N/A	State

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