EPA Air · stack tests by year
Air-emissions stack tests in 2025
- 26,291Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
States, 2025
- California 5,390
- Ohio 2,213
- New Mexico 1,801
- Indiana 1,619
- Florida 1,419
- Wyoming 1,362
- Georgia 1,233
- Oklahoma 1,229
- Pennsylvania 951
- Missouri 768
- Alabama 693
- Mississippi 688
- Arkansas 619
- Iowa 500
- Colorado 405
- Michigan 387
- Texas 308
- North Carolina 275
- Illinois 264
- Washington 251
- Wisconsin 245
- Minnesota 238
- West Virginia 224
- Delaware 212
- South Carolina 210
- Kentucky 204
- Kansas 202
- Connecticut 178
- Utah 175
- Montana 174
- Virginia 170
- Tennessee 168
- Alaska 152
- Nebraska 145
- North Dakota 143
- Maine 131
- New York 124
- Louisiana 117
- Arizona 116
- Idaho 111
- Nevada 73
- New Hampshire 59
- Massachusetts 59
- Oregon 56
- Hawaii 53
- Maryland 51
- South Dakota 46
- Rhode Island 30
- District of Columbia 28
- Puerto Rico 14
- Vermont 4
- New Jersey 4
Other years
Air-emissions stack tests recorded in 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-08-20 | INTERNATIONAL PAPER COMPANY | PRATTVILLE, Autauga, AL | Pass | State |
| 2025-08-20 | INTERNATIONAL PAPER COMPANY | PRATTVILLE, Autauga, AL | Pass | State |
| 2025-08-20 | KRONOSPAN USA — high-priority violation on file | EASTABOGA, Calhoun, AL | Pass | State |
| 2025-08-20 | KRONOSPAN USA — high-priority violation on file | EASTABOGA, Calhoun, AL | Pass | State |
| 2025-08-20 | TENNESSEE GAS PIPELINE COMPANY, LLC | HAMILTON, Marion, AL | Pass | State |
| 2025-08-20 | TENNESSEE GAS PIPELINE COMPANY, LLC | HAMILTON, Marion, AL | Pass | State |
| 2025-08-20 | AMRIZE CEMENT, INC. | THEODORE, Mobile, AL | Pass | State |
| 2025-08-20 | WESTROCK COATED BOARD LLC-MAHRT MILL | PHENIX CITY, Russell, AL | Pass | State |
| 2025-08-20 | EXPLORATORY VENTURES, LLC. | OSCEOLA, Mississippi, AR | Pass | State |
| 2025-08-20 | DESOTO GATHERING COMPANY, LLC - COVE CREEK CPF-4 | DAMASCUS, Van Buren, AR | Pass | State |
| 2025-08-20 | PHOENIX CEMENT | CLARKDALE, Yavapai, AZ | Pass | State |
| 2025-08-20 | LADW&P-HAYNES STEAM | LONG BEACH, Los Angeles, CA | Pass | Local |
| 2025-08-20 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-08-20 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-08-20 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-08-20 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-08-20 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-08-20 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-08-20 | FOSTER FOOD PRODUCTS — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-08-20 | FOSTER FOOD PRODUCTS — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-08-20 | FOSTER FOOD PRODUCTS — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-08-20 | FOSTER FOOD PRODUCTS — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-08-20 | FOSTER FOOD PRODUCTS — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-08-20 | FOSTER FOOD PRODUCTS — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-08-20 | OWENS BROCKWAY GLASS | TRACY, San Joaquin, CA | Fail | Local |
| 2025-08-20 | OWENS BROCKWAY GLASS | TRACY, San Joaquin, CA | Fail | Local |
| 2025-08-20 | BARGATH LLC - PARACHUTE CREEK GAS PLANT | PARACHUTE 2.9 MI. NW OF, Garfield, CO | Pass | State |
| 2025-08-20 | BARGATH LLC - PARACHUTE CREEK GAS PLANT | PARACHUTE 2.9 MI. NW OF, Garfield, CO | Pass | State |
| 2025-08-20 | DEVON POWER LLC | DEVON, New Haven, CT | Pass | State |
| 2025-08-20 | JAX LNG LLC | JACKSONVILLE, Duval, FL | Pass | State |
| 2025-08-20 | JAX LNG LLC | JACKSONVILLE, Duval, FL | Pass | State |
| 2025-08-20 | FLORIDA POWER & LIGHT COMPANY | PENSACOLA, Escambia, FL | Pass | State |
| 2025-08-20 | WEST FRASER, INC | MCDAVID, Escambia, FL | Pass | State |
| 2025-08-20 | WEST FRASER, INC | MCDAVID, Escambia, FL | Pass | State |
| 2025-08-20 | WEST FRASER, INC | MCDAVID, Escambia, FL | Pass | State |
| 2025-08-20 | WEST FRASER, INC | MCDAVID, Escambia, FL | Pass | State |
| 2025-08-20 | TAMPA ELECTRIC COMPANY | TAMPA, Hillsborough, FL | Pass | State |
| 2025-08-20 | TAMPA ELECTRIC COMPANY | TAMPA, Hillsborough, FL | Pass | State |
| 2025-08-20 | DUVAL ASPHALT PRODUCTS, INC. | JACKSONVILLE, Duval, FL | Pass | State |
| 2025-08-20 | GEORGIA POWER CO. - PLANT MCDONOUGH- ATKINSON | ATLANTA, Cobb, GA | Pass | State |
| 2025-08-20 | GEORGIA POWER CO. - PLANT MCDONOUGH- ATKINSON | ATLANTA, Cobb, GA | Pass | State |
| 2025-08-20 | SK BATTERY AMERICA, INC. | COMMERCE, Jackson, GA | Pass | State |
| 2025-08-20 | SK BATTERY AMERICA, INC. | COMMERCE, Jackson, GA | Pass | State |
| 2025-08-20 | PCS NITROGEN FERTILIZER L.P. - AUGUSTA PLANT | AUGUSTA, Richmond, GA | Pass | State |
| 2025-08-20 | DOYLE ENERGY FACILITY | MONROE, Walton, GA | Pass | State |
| 2025-08-20 | UNIVERSITY OF IOWA | IOWA CITY, Johnson, IA | Pass | State |
| 2025-08-20 | POET BIOREFINING - LIBERTY (EMMETSBURG) — high-priority violation on file | EMMETSBURG, Palo Alto, IA | Fail | State |
| 2025-08-20 | CF INDUSTRIES NITROGEN LLC - PORT NEAL NITROGEN COMPLEX — high-priority violation on file | SERGEANT BLUFF, Woodbury, IA | Fail | State |
| 2025-08-20 | SDI LAFARGA, LLC | NEW HAVEN, Allen, IN | Pass | State |
| 2025-08-20 | RIETH RILEY ASPHALT PLANT NO 366 | LA PORTE, LaPorte, IN | Pass | State |
| 2025-08-20 | VALERO RENEWABLE FUELS COMPANY DBA VALERO LINDEN PLANT | LINDEN, Montgomery, IN | Pass | State |
| 2025-08-20 | VALERO RENEWABLE FUELS COMPANY DBA VALERO LINDEN PLANT | LINDEN, Montgomery, IN | Pass | State |
| 2025-08-20 | VALERO RENEWABLE FUELS COMPANY DBA VALERO LINDEN PLANT | LINDEN, Montgomery, IN | Pass | State |
| 2025-08-20 | VALERO RENEWABLE FUELS COMPANY DBA VALERO LINDEN PLANT | LINDEN, Montgomery, IN | Pass | State |
| 2025-08-20 | AES INDIANA PETERSBURG GENERATING STATION — high-priority violation on file | PETERSBURG, Pike, IN | Pass | State |
| 2025-08-20 | AES INDIANA PETERSBURG GENERATING STATION — high-priority violation on file | PETERSBURG, Pike, IN | Pass | State |
| 2025-08-20 | LOUISVILLE GAS & ELECTRIC COMPANY, MILL CREEK GENERATING STATION | LOUISVILLE, Jefferson, KY | Pass | Local |
| 2025-08-20 | VENTURE GLOBAL PLAQUEMINES LNG LLC - PLAQUEMINES LNG TERMINAL | PORT SULPHUR, Plaquemines, LA | Pass | State |
| 2025-08-20 | LOUISIANA-PACIFIC CORPORATION | NEW LIMERICK, Aroostook, ME | Pass | State |
| 2025-08-20 | LIGNETICS OF MAINE, LLC | STRONG, Franklin, ME | Fail | State |
| 2025-08-20 | DTE ST. CLAIR / BELLE RIVER POWER PLANT — high-priority violation on file | CHINA, St. Clair, MI | Pass | State |
| 2025-08-20 | CENTRAL MISSOURI SANITARY LANDFILL | SEDALIA, Pettis, MO | Pass | State |
| 2025-08-20 | CENTRAL MISSOURI SANITARY LANDFILL | SEDALIA, Pettis, MO | Pass | State |
| 2025-08-20 | CENTRAL MISSOURI RENEWABLE NATURAL GAS LLC | SEDALIA, Pettis, MO | Pass | State |
| 2025-08-20 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-08-20 | N. BORDER PIPELINE CO STA. 3 | CULBERTSON, Roosevelt, MT | Pass | State |
| 2025-08-20 | N. BORDER PIPELINE CO STA. 3 | CULBERTSON, Roosevelt, MT | Pass | State |
| 2025-08-20 | CHEMOURS COMPANY - FAYETTEVILLE WORKS | FAYETTEVILLE, Bladen, NC | Pass | State |
| 2025-08-20 | CITY OF GREENSBORO - T.Z. OSBORNE WATER RECLAMATION FACILITY — high-priority violation on file | MCLEANSVILLE, Guilford, NC | Pending | State |
| 2025-08-20 | WESTROCK KRAFT PAPER, LLC | ROANOKE RAPIDS, Halifax, NC | Pass | State |
| 2025-08-20 | WBI ENERGY TRANSMISSION, INC. - MANNING COMPRESSOR STATION | MANNING, Dunn, ND | N/A | State |
| 2025-08-20 | GREEN PLAINS WOOD RIVER LLC — high-priority violation on file | WOOD RIVER, Hall, NE | Pass | State |
| 2025-08-20 | BD PHARMACEUTICAL SYSTEMS | COLUMBUS, Platte, NE | N/A | State |
| 2025-08-20 | CARGILL INC — high-priority violation on file | BLAIR, Washington, NE | N/A | State |
| 2025-08-20 | CARGILL INC — high-priority violation on file | BLAIR, Washington, NE | Pass | State |
| 2025-08-20 | AGATE LLC | LINCOLN, Lancaster, NE | Pass | Local |
| 2025-08-20 | RDX FEDERAL COM 17-26S30E-C PAD | MALAGA, Eddy, NM | Pass | State |
| 2025-08-20 | OXY USA INC - CORRAL CS 2S | MALAGA, Eddy, NM | Pass | State |
| 2025-08-20 | OXY USA INC - CORRAL CS 2S | MALAGA, Eddy, NM | Pass | State |
| 2025-08-20 | EUNICE GAS PROCESSING PLANT — high-priority violation on file | EUNICE, Lea, NM | Pass | State |
| 2025-08-20 | CHARLES LING NORTH TB | JAL, Lea, NM | Pass | State |
| 2025-08-20 | COVANTA HUNTINGTON LLC | E NORTHPORT, Suffolk, NY | Pass | State |
| 2025-08-20 | EQM OLYMPUS MIDSTREAM, LLC - EMPIRE COMPRESSOR STATION | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2025-08-20 | EQM OLYMPUS MIDSTREAM, LLC - EMPIRE COMPRESSOR STATION | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2025-08-20 | EQM OLYMPUS MIDSTREAM, LLC - EMPIRE COMPRESSOR STATION | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2025-08-20 | EOG RESOURCES INC - SABLE CTB | CUMBERLAND, Guernsey, OH | Pass | State |
| 2025-08-20 | EOG RESOURCES INC - SABLE CTB | CUMBERLAND, Guernsey, OH | Pass | State |
| 2025-08-20 | EOG RESOURCES INC - SABLE CTB | CUMBERLAND, Guernsey, OH | Pass | State |
| 2025-08-20 | EOG RESOURCES INC - GAMBIT CTB | TIPPECANOE, Harrison, OH | Pass | State |
| 2025-08-20 | EOG RESOURCES INC - GAMBIT CTB | TIPPECANOE, Harrison, OH | Pass | State |
| 2025-08-20 | EOG RESOURCES INC - GAMBIT CTB | TIPPECANOE, Harrison, OH | Pass | State |
| 2025-08-20 | ASCENT RESOURCES - UTICA LLC - BOUSKA FRE HR | FREEPORT, Harrison, OH | Pass | State |
| 2025-08-20 | ASCENT RESOURCES - UTICA LLC - BOUSKA FRE HR | FREEPORT, Harrison, OH | Pass | State |
| 2025-08-20 | ASCENT RESOURCES - UTICA LLC - BOUSKA FRE HR | FREEPORT, Harrison, OH | Pass | State |
| 2025-08-20 | ASCENT RESOURCES - UTICA LLC - BOUSKA FRE HR | FREEPORT, Harrison, OH | Pass | State |
| 2025-08-20 | DEVON ENERGY PRODUCTION CO LP / COWAN 15 10 PAD 2 | WATONGA, Blaine, OK | Pass | State |
| 2025-08-20 | CAMINO NATURAL RESOURCES LLC / HUNT 27 12 7 1H PAD | EL RENO, Canadian, OK | Pass | State |
| 2025-08-20 | CAMINO NATURAL RESOURCES LLC / CHARLES COE 1108 13 1MH | UNION CITY, Canadian, OK | Pass | State |
| 2025-08-20 | CAMINO NATURAL RESOURCES LLC / HMB 2 3 WATCH THIS 3 PRODUCTION FACILI | EL RENO, Canadian, OK | Pass | State |
| 2025-08-20 | ONEOK FIELD SERVICES CO LLC / REDTAIL COMPRESSOR STATION | LINDSAY, Garvin, OK | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.