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 |
|---|---|---|---|---|
| 2025-11-25 | CASPER REFINERY (HF SINCLAIR CASPER REFINING LLC) — high-priority violation on file | EVANSVILLE, Natrona, WY | Pass | State |
| 2025-11-24 | FREEPORT MCMORAN - MIAMI SMELTER | MIAMI, Gila, AZ | Pass | State |
| 2025-11-24 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | DELAWARE CITY, New Castle, DE | Pass | State |
| 2025-11-24 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | DELAWARE CITY, New Castle, DE | Pass | State |
| 2025-11-24 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | DELAWARE CITY, New Castle, DE | Pass | State |
| 2025-11-24 | WESTERN CONSTRUCTION 00098 | BOISE, Ada, ID | Pass | State |
| 2025-11-24 | WESTERN CONSTRUCTION 00604 | BOISE, Ada, ID | Pass | State |
| 2025-11-24 | WESTERN CONSTRUCTION 00605 | BOISE, Ada, ID | Pass | State |
| 2025-11-24 | WESTERN CONSTRUCTION INC 00680 | BOISE, Ada, ID | Pass | State |
| 2025-11-24 | WESTERN CONSTRUCTION INC 00682 | BOISE, Ada, ID | Pass | State |
| 2025-11-24 | WESTERN CONSTRUCTION INC 00683 | BOISE, Ada, ID | Pass | State |
| 2025-11-24 | DUKE ENERGY INDIANA LLC EDWARDSPORT GENERATING STATION | EDWARDSPORT, Knox, IN | Pass | State |
| 2025-11-24 | DUKE ENERGY INDIANA LLC EDWARDSPORT GENERATING STATION | EDWARDSPORT, Knox, IN | Pass | State |
| 2025-11-24 | AMERICAN CRYSTAL SUGAR - EAST GRAND FORKS | EAST GRAND FORKS, Polk, MN | Pass | State |
| 2025-11-24 | ME GLOBAL INC | DULUTH, St. Louis, MN | Pass | State |
| 2025-11-24 | CARGILL, INC. | KANSAS CITY, Jackson, MO | Pass | State |
| 2025-11-24 | CARGILL, INC. | KANSAS CITY, Jackson, MO | Pass | State |
| 2025-11-24 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-11-24 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-11-24 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-11-24 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-11-24 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-11-24 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-11-24 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-11-24 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-11-24 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-11-24 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-11-24 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-11-24 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-11-24 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-11-24 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-11-24 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-11-24 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-11-24 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-11-24 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-11-24 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-11-24 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-11-24 | CENTRAL MISSOURI SANITARY LANDFILL | SEDALIA, Pettis, MO | Pass | State |
| 2025-11-24 | CENTRAL MISSOURI SANITARY LANDFILL | SEDALIA, Pettis, MO | Pass | State |
| 2025-11-24 | ENTERPRISE - OXY SAND DUNES CENTRAL COMPRESSOR STATION | MALAGA, Eddy, NM | Pass | State |
| 2025-11-24 | DIMENSIONS 6 SECTION 8 GAS SALES COMPRESSOR STATION | MALAGA, Eddy, NM | Pass | State |
| 2025-11-24 | CASSIUS PAD W | LOVING, Eddy, NM | Pass | State |
| 2025-11-24 | MAMA JO TB | LOVING, Eddy, NM | Pass | State |
| 2025-11-24 | MAMA JO TB | LOVING, Eddy, NM | Pass | State |
| 2025-11-24 | ELECTRA SPECIAL TB | MONUMENT, Lea, NM | Pass | State |
| 2025-11-24 | GEORGIA-PACIFIC WAUNA LLC — high-priority violation on file | CLATSKANIE, Clatsop, OR | Pass | State |
| 2025-11-24 | ETC NORTHEAST PIPELINE LLC/RED BEND COMP STA | TROUT RUN, Lycoming, PA | Pass | State |
| 2025-11-24 | THE ESPOMA CO/FRAILEY TWP — high-priority violation on file | HEGINS, Schuylkill, PA | Pending | State |
| 2025-11-24 | EMPET, D. PAD 1 | KINGSLEY, Susquehanna, PA | Pass | State |
| 2025-11-24 | EAST KARNES CENTRAL FACILITY | KENEDY, Karnes, TX | N/A | State |
| 2025-11-24 | HF SINCLAIR PARCO REFINING LLC — high-priority violation on file | SINCLAIR, Carbon, WY | Pass | State |
| 2025-11-24 | CASPER REFINERY (HF SINCLAIR CASPER REFINING LLC) — high-priority violation on file | EVANSVILLE, Natrona, WY | Pass | State |
| 2025-11-23 | EOG - EL JEFE LGL STATION | JAL, Lea, NM | Pass | State |
| 2025-11-22 | EOG - ODIN COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-11-21 | FREEPORT-MCMORAN - MORENCI | MORENCI, Greenlee, AZ | Pass | State |
| 2025-11-21 | USMC - YERMO LOGISTICS CNTR | BARSTOW, San Bernardino, CA | Pass | Local |
| 2025-11-21 | CERTAINTEED CORP — high-priority violation on file | CHOWCHILLA, Madera, CA | Pass | Local |
| 2025-11-21 | CERTAINTEED CORP — high-priority violation on file | CHOWCHILLA, Madera, CA | Pass | Local |
| 2025-11-21 | CERTAINTEED CORP — high-priority violation on file | CHOWCHILLA, Madera, CA | Pass | Local |
| 2025-11-21 | SUNIVA, INC. | NORCROSS, Gwinnett, GA | Pass | State |
| 2025-11-21 | SUNIVA, INC. | NORCROSS, Gwinnett, GA | Pass | State |
| 2025-11-21 | SUNIVA, INC. | NORCROSS, Gwinnett, GA | Pass | State |
| 2025-11-21 | SUNIVA, INC. | NORCROSS, Gwinnett, GA | Pass | State |
| 2025-11-21 | STEEL DYNAMICS, INC. STRUCTURAL & RAIL DIVISION — high-priority violation on file | COLUMBIA CITY, Whitley, IN | Fail | State |
| 2025-11-21 | TES FILER CITY STATION | FILER CITY, Manistee, MI | Pass | State |
| 2025-11-21 | ARAUCO NORTH AMERICA | GRAYLING, Crawford, MI | Pass | State |
| 2025-11-21 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-11-21 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-11-21 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-11-21 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-11-21 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-11-21 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-11-21 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-11-21 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-11-21 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-11-21 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-11-21 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-11-21 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-11-21 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-11-21 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-11-21 | ARDAGH GLASS INC. | PEVELY, Jefferson, MO | Pass | State |
| 2025-11-21 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-11-21 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-11-21 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-11-21 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-11-21 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-11-21 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-11-21 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-11-21 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-11-21 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-11-21 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-11-21 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-11-21 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-11-21 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-11-21 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-11-21 | KINDER MORGAN | SAINT LOUIS, St. Louis (city), MO | Pass | State |
| 2025-11-21 | COACH JOE FED TB | LOCO HILLS, Eddy, NM | Pass | State |
| 2025-11-21 | TITAN TREATER PLANT NO1 | JAL, Lea, NM | Pass | State |
| 2025-11-21 | TRUMBULL ENERGY CENTER | LORDSTOWN, Trumbull, OH | Pass | State |
| 2025-11-21 | TRUMBULL ENERGY CENTER | LORDSTOWN, Trumbull, OH | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.