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 |
|---|---|---|---|---|
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | BONANZA CREEK - ANTELOPE CPF 13-21 | KERSEY 10.4 MI. E OF, Weld, CO | N/A | State |
| 2025-08-28 | JEA | JACKSONVILLE, Duval, FL | Pass | State |
| 2025-08-28 | ORLANDO UTILITIES COMMISSION | ORLANDO, Orange, FL | Pass | State |
| 2025-08-28 | LANGBOARD - WILLACOOCHEE — high-priority violation on file | WILLACOOCHEE, Atkinson, GA | Pass | State |
| 2025-08-28 | LANGBOARD OSB, QUITMAN | QUITMAN, Brooks, GA | Pass | State |
| 2025-08-28 | LANGBOARD OSB, QUITMAN | QUITMAN, Brooks, GA | Pass | State |
| 2025-08-28 | BUCKEYE SE TERMINALS LP - ALBANY II | ALBANY, Dougherty, GA | Pass | State |
| 2025-08-28 | HAWK ROAD ENERGY FACILITY | FRANKLIN, Heard, GA | Pass | State |
| 2025-08-28 | CITGO PETROLEUM CORPORATION | HUNTINGTON, Huntington, IN | Pass | State |
| 2025-08-28 | CLEVELAND-CLIFFS STEEL LLC — high-priority violation on file | EAST CHICAGO, Lake, IN | Pass | State |
| 2025-08-28 | CLEVELAND-CLIFFS STEEL LLC — high-priority violation on file | EAST CHICAGO, Lake, IN | Pass | State |
| 2025-08-28 | CLEVELAND-CLIFFS STEEL LLC — high-priority violation on file | EAST CHICAGO, Lake, IN | Fail | State |
| 2025-08-28 | HEIDELBERG MATERIALS US CEMENT LLC — high-priority violation on file | MITCHELL, Lawrence, IN | Pass | State |
| 2025-08-28 | HEIDELBERG MATERIALS US CEMENT LLC — high-priority violation on file | MITCHELL, Lawrence, IN | Pass | State |
| 2025-08-28 | GREEN PLAINS MOUNT VERNON LLC — high-priority violation on file | MOUNT VERNON, Posey, IN | Pass | State |
| 2025-08-28 | GREEN PLAINS MOUNT VERNON LLC — high-priority violation on file | MOUNT VERNON, Posey, IN | Pass | State |
| 2025-08-28 | GREEN PLAINS MOUNT VERNON LLC — high-priority violation on file | MOUNT VERNON, Posey, IN | Pass | State |
| 2025-08-28 | GREEN PLAINS MOUNT VERNON LLC — high-priority violation on file | MOUNT VERNON, Posey, IN | Pass | State |
| 2025-08-28 | METALX LLC DBA METALX WABASH | WABASH, Wabash, IN | Pass | State |
| 2025-08-28 | METALX LLC DBA METALX WABASH | WABASH, Wabash, IN | Pass | State |
| 2025-08-28 | METALX LLC DBA METALX WABASH | WABASH, Wabash, IN | Pass | State |
| 2025-08-28 | METALX LLC DBA METALX WABASH | WABASH, Wabash, IN | Pass | State |
| 2025-08-28 | METALX LLC DBA METALX WABASH | WABASH, Wabash, IN | Pass | State |
| 2025-08-28 | CHENIERE CREOLE TRAIL PIPELINE LP - GILLIS COMPRESSOR STATION | RAGLEY, Beauregard, LA | Pass | State |
| 2025-08-28 | CHENIERE CREOLE TRAIL PIPELINE LP - GILLIS COMPRESSOR STATION | RAGLEY, Beauregard, LA | Pass | State |
| 2025-08-28 | VENTURE GLOBAL PLAQUEMINES LNG LLC - PLAQUEMINES LNG TERMINAL | PORT SULPHUR, Plaquemines, LA | Pass | State |
| 2025-08-28 | DANISCO USA INC. | ROCKLAND, Knox, ME | Pass | State |
| 2025-08-28 | ND PAPER INC. | RUMFORD, Oxford, ME | Pass | State |
| 2025-08-28 | ARBOR HILLS ENERGY, LLC | NORTHVILLE, Washtenaw, MI | Pass | State |
| 2025-08-28 | TES FILER CITY STATION | FILER CITY, Manistee, MI | Pass | State |
| 2025-08-28 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-08-28 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-08-28 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-08-28 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Fail | State |
| 2025-08-28 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-08-28 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-08-28 | NEW MADRID POWER PLANT-ASSOC ELEC COOP | MARSTON, New Madrid, MO | Pass | State |
| 2025-08-28 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2025-08-28 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2025-08-28 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2025-08-28 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2025-08-28 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2025-08-28 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2025-08-28 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2025-08-28 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2025-08-28 | TRUEROCK MATERIALS - SILER CITY PLANT | STALEY (CHATHAM,NC), Chatham, NC | Pass | State |
| 2025-08-28 | CITY OF ROCKY MOUNT - CHEESECAKE FACTORY | ROCKY MOUNT, Nash, NC | Pass | State |
| 2025-08-28 | ELIZABETH CITY WASTEWATER TREATMENT PLANT | ELIZABETH CITY, Pasquotank, NC | Pass | State |
| 2025-08-28 | NPPD SHELDON STATION | HALLAM, Lancaster, NE | Pass | Local |
| 2025-08-28 | PECOS COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-08-28 | PECOS COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-08-28 | CEDAR CANYON 28 COMPRESSOR STATION | MALAGA, Eddy, NM | Pass | State |
| 2025-08-28 | WILMA CENTRAL GATHERING FACILITY | MALAGA, Eddy, NM | Pass | State |
| 2025-08-28 | WILMA CENTRAL GATHERING FACILITY | MALAGA, Eddy, NM | Pass | State |
| 2025-08-28 | WILMA CENTRAL GATHERING FACILITY | MALAGA, Eddy, NM | Pass | State |
| 2025-08-28 | WILMA CENTRAL GATHERING FACILITY | MALAGA, Eddy, NM | Pass | State |
| 2025-08-28 | WILMA CENTRAL GATHERING FACILITY | MALAGA, Eddy, NM | Pass | State |
| 2025-08-28 | EOG - QUAIL COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-08-28 | OXBOW 26 25 W1EH FED COM 1H BATTERY | MALAGA, Eddy, NM | Pass | State |
| 2025-08-28 | DATE 14 STATE CTB | EUNICE, Lea, NM | Pass | State |
| 2025-08-28 | WILD SALSA CTB | JAL, Lea, NM | Pass | State |
| 2025-08-28 | NYU LANGONE MEDICAL CENTER | NEW YORK, New York, NY | Pass | State |
| 2025-08-28 | ANCHOR GLASS - ELMIRA | ELMIRA(C), Chemung, NY | Pass | State |
| 2025-08-28 | HONEOYE FALLS QUARRY & ASPHALT PLANT | LIMA;MENDON;RUSH, Livingston, NY | Fail | State |
| 2025-08-28 | IMPERIAL ALUMINUM - MINERVA, LLC — high-priority violation on file | MINERVA, Carroll, OH | Fail | State |
| 2025-08-28 | IMPERIAL ALUMINUM - MINERVA, LLC — high-priority violation on file | MINERVA, Carroll, OH | Fail | State |
| 2025-08-28 | IMPERIAL ALUMINUM - MINERVA, LLC — high-priority violation on file | MINERVA, Carroll, OH | Pass | State |
| 2025-08-28 | BUCYRUS ROAD MATERIALS | BUCYRUS, Crawford, OH | Pass | State |
| 2025-08-28 | ASCENT RESOURCES - UTICA LLC - MATUSEK WHL BL | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2025-08-28 | ASCENT RESOURCES - UTICA LLC - MATUSEK WHL BL | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2025-08-28 | ASCENT RESOURCES - UTICA LLC - MATUSEK WHL BL | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.