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 |
|---|---|---|---|---|
| 2025-12-10 | AMAZON DATA SERVICES INC, MADISON MEGA SITE — high-priority violation on file | CANTON, Madison, MS | Pass | State |
| 2025-12-10 | AMAZON DATA SERVICES INC, MADISON MEGA SITE — high-priority violation on file | CANTON, Madison, MS | Pass | State |
| 2025-12-10 | AMAZON DATA SERVICES INC, MADISON MEGA SITE — high-priority violation on file | CANTON, Madison, MS | Pass | State |
| 2025-12-10 | AMAZON DATA SERVICES INC, MADISON MEGA SITE — high-priority violation on file | CANTON, Madison, MS | Pass | State |
| 2025-12-10 | AMAZON DATA SERVICES INC, MADISON MEGA SITE — high-priority violation on file | CANTON, Madison, MS | Pass | State |
| 2025-12-10 | AMAZON DATA SERVICES INC, MADISON MEGA SITE — high-priority violation on file | CANTON, Madison, MS | Pass | State |
| 2025-12-10 | AMAZON DATA SERVICES INC, MADISON MEGA SITE — high-priority violation on file | CANTON, Madison, MS | Pass | State |
| 2025-12-10 | AMAZON DATA SERVICES INC, MADISON MEGA SITE — high-priority violation on file | CANTON, Madison, MS | Pass | State |
| 2025-12-10 | CHEMOURS COMPANY - FAYETTEVILLE WORKS | FAYETTEVILLE, Bladen, NC | Pass | State |
| 2025-12-10 | WEST FRASER, INC. - ARMOUR LUMBER MILL | RIEGELWOOD, Columbus, NC | Pass | State |
| 2025-12-10 | UWHARRIE MOUNTAIN RENEWABLE ENERGY, LLC | MOUNT GILEAD, Montgomery, NC | Pending | State |
| 2025-12-10 | NC DOA CENTRAL HEATING PLANT | RALEIGH, Wake, NC | Pass | State |
| 2025-12-10 | NORTHERN NATURAL GAS COMPANY | HOMER, Dakota, NE | N/A | State |
| 2025-12-10 | DURGIN AND CROWELL LUMBER COMPANY, INC. | SPRINGFIELD, Sullivan, NH | Pass | State |
| 2025-12-10 | BITTER LAKE COMPRESSOR STATION | ROSWELL, Chaves, NM | Pass | State |
| 2025-12-10 | BITTER LAKE COMPRESSOR STATION | ROSWELL, Chaves, NM | Pass | State |
| 2025-12-10 | TIGER BOOSTER STATION | CARLSBAD, Eddy, NM | Pass | State |
| 2025-12-10 | LOST TANK 25 CPF AND CGL | MALAGA, Eddy, NM | Pass | State |
| 2025-12-10 | IRVIN WALL STATE COM NO131H | JAL, Lea, NM | Pass | State |
| 2025-12-10 | GORGON LGL STATION | MALAGA, Lea, NM | Pass | State |
| 2025-12-10 | GORGON LGL STATION | MALAGA, Lea, NM | Pass | State |
| 2025-12-10 | GORGON LGL STATION | MALAGA, Lea, NM | Pass | State |
| 2025-12-10 | GORGON LGL STATION | MALAGA, Lea, NM | Pass | State |
| 2025-12-10 | NARROWS GENERATING STATION | BROOKLYN (6102), Kings, NY | Pass | State |
| 2025-12-10 | UTICA STATION | FRANKFORT, Herkimer, NY | Pass | State |
| 2025-12-10 | LIMESTONE RNG HIGH BTU FACILITY — high-priority violation on file | LOWELLVILLE, Mahoning, OH | Pass | State |
| 2025-12-10 | LIMESTONE RNG HIGH BTU FACILITY — high-priority violation on file | LOWELLVILLE, Mahoning, OH | Pass | State |
| 2025-12-10 | LIMESTONE RNG HIGH BTU FACILITY — high-priority violation on file | LOWELLVILLE, Mahoning, OH | Pass | State |
| 2025-12-10 | JOHNS MANVILLE | DEFIANCE, Defiance, OH | Pass | State |
| 2025-12-10 | JOHNS MANVILLE | DEFIANCE, Defiance, OH | Pass | State |
| 2025-12-10 | ASCENT RESOURCES - UTICA LLC - COLLINS WYN JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-12-10 | ASCENT RESOURCES - UTICA LLC - COLLINS WYN JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-12-10 | ASCENT RESOURCES - UTICA LLC - COLLINS WYN JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-12-10 | ASCENT RESOURCES - UTICA LLC - ARCHIE WYN JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-12-10 | ASCENT RESOURCES - UTICA LLC - ARCHIE WYN JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-12-10 | ASCENT RESOURCES - UTICA LLC - ARCHIE WYN JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-12-10 | ASCENT RESOURCES - UTICA LLC - CROWELL WYN JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-12-10 | ASCENT RESOURCES - UTICA LLC - CROWELL WYN JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-12-10 | ASCENT RESOURCES - UTICA LLC - CROWELL WYN JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-12-10 | EXPAND OPERATING LLC/SCOTT WELLPAD | NEW MILFORD, Susquehanna, PA | Pass | State |
| 2025-12-10 | CROWN BEVERAGE PACKAGING | CHERAW, Chesterfield, SC | Pass | State |
| 2025-12-10 | NICCA USA INC | FOUNTAIN INN, Laurens, SC | Pass | State |
| 2025-12-10 | FICOSA NORTH AMERICA CORPORATION — high-priority violation on file | COOKEVILLE, Putnam, TN | Pass | State |
| 2025-12-10 | TENNESSEE OPERATIONS OF EASTMAN CHEMICAL COMPANY — high-priority violation on file | KINGSPORT, Sullivan, TN | Pass | State |
| 2025-12-10 | DOMINION - REMINGTON CT STATION | REMINGTON, Fauquier, VA | Pass | State |
| 2025-12-10 | FREDERICK COUNTY REGIONAL LANDFILL | WINCHESTER, Frederick, VA | Pass | State |
| 2025-12-10 | WESTROCK LONGVIEW LLC — high-priority violation on file | LONGVIEW, Cowlitz, WA | Pass | State |
| 2025-12-10 | HARDEL MUTUAL PLYWOOD CORPORATION — high-priority violation on file | CHEHALIS, Lewis, WA | Pass | Local |
| 2025-12-10 | U.S. ENERGY MADISON SOUTH TERMINAL | MC FARLAND, Dane, WI | Pass | State |
| 2025-12-10 | WVA MANUFACTURING, LLC, ALLOY — high-priority violation on file | ALLOY, Fayette, WV | Pass | State |
| 2025-12-10 | MONONGAHELA POWER COMPANY, HARRISON STATION | HAYWOOD, Harrison, WV | Pass | State |
| 2025-12-10 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | PROCTOR, Marshall, WV | Pass | State |
| 2025-12-10 | ANTERO MIDSTREAM LLC, LINCOLN COMPRESSOR STN | READER, Wetzel, WV | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-10 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2025-12-09 | PEAK RENEWABLES BIOENERGY (DOTHAN) LLC | DOTHAN, Houston, AL | Pass | State |
| 2025-12-09 | TRANSCONTINENTAL GAS PIPE LINE COMPANY L | WADLEY, Randolph, AL | Pass | State |
| 2025-12-09 | HUNT REFINING COMPANY | TUSCALOOSA, Tuscaloosa, AL | Pass | State |
| 2025-12-09 | HUNT REFINING COMPANY | TUSCALOOSA, Tuscaloosa, AL | Pass | State |
| 2025-12-09 | DESOTO GATHERING COMPANY, LLC - NEW QUITMAN CPF-3 | QUITMAN, Cleburne, AR | Pass | State |
| 2025-12-09 | DESOTO GATHERING COMPANY LLC - NEW QUITMAN CPF-4 | QUITMAN, Faulkner, AR | Pass | State |
| 2025-12-09 | SACRAMENTO MUNICIPAL UTILITY DIST. FINANCING AUTHORITY DBA CAMPBELL POWER PLANT | SACRAMENTO, Sacramento, CA | Pending | Local |
| 2025-12-09 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2025-12-09 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2025-12-09 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2025-12-09 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2025-12-09 | SENTINEL PEAK RESOURCES CA LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-12-09 | BUCKEYE PT TERMINALS, L.P. - FORBES AVENUE TERMINAL | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-12-09 | TPSI TERMINALS LLC | FORT LAUDERDALE, Broward, FL | Pass | State |
| 2025-12-09 | CENTRAL MATERIALS COMPANY, INC. | LECANTO, Citrus, FL | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.