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 |
|---|---|---|---|---|
| 2025-11-21 | TRUMBULL ENERGY CENTER | LORDSTOWN, Trumbull, OH | Pass | State |
| 2025-11-21 | GULFPORT APPALACHIA, LLC - ROBINETTE | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-11-21 | GULFPORT APPALACHIA, LLC - ROBINETTE | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-11-21 | GULFPORT APPALACHIA, LLC - ROBINETTE | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-11-21 | CLEVELAND-CLIFFS STEEL CORPORATION — high-priority violation on file | MIDDLETOWN, Butler, OH | Pass | State |
| 2025-11-21 | C&D WASTE SOLUTIONS, LLC — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2025-11-21 | YUASA BATTERY INC/LAURELDALE | LAURELDALE, Berks, PA | Pass | State |
| 2025-11-21 | REWORLD PLYMOUTH/ PLYMOUTH — high-priority violation on file | CONSHOHOCKEN, Montgomery, PA | Pass | State |
| 2025-11-21 | MAID RITE SPECIALITY FOODS INC/DUNMORE | DUNMORE, Lackawanna, PA | Pass | State |
| 2025-11-21 | FALCON COMPRESSOR STATION | LENORAH, Martin, TX | Pass | State |
| 2025-11-21 | FALCON COMPRESSOR STATION | LENORAH, Martin, TX | Pass | State |
| 2025-11-21 | FALCON COMPRESSOR STATION | LENORAH, Martin, TX | Pass | State |
| 2025-11-21 | FALCON COMPRESSOR STATION | LENORAH, Martin, TX | Pass | State |
| 2025-11-21 | FALCON COMPRESSOR STATION | LENORAH, Martin, TX | Pass | State |
| 2025-11-21 | DOMINION ENERGY - VIRGINIA CITY HYBRID ENERGY CENTER | ST PAUL, Wise, VA | Pass | State |
| 2025-11-21 | UNIVERSITY OF VIRGINIA | CHARLOTTESVILLE, Charlottesville (city), VA | Pass | State |
| 2025-11-21 | LOVELL PLANT (GEORGIA-PACIFIC GYPSUM) | LOVELL, Big Horn, WY | Pass | State |
| 2025-11-20 | SOUTHERN NATURAL GAS | HEFLIN, Cleburne, AL | Pass | State |
| 2025-11-20 | SOUTHERN NATURAL GAS | HEFLIN, Cleburne, AL | Pass | State |
| 2025-11-20 | DESOTO GATHERING COMPANY, LLC - CHARLEY CPF-4 | HEBER SPRINGS, Cleburne, AR | Pass | State |
| 2025-11-20 | MISSION CREEK OPCO, LLC - DORCHEAT GAS PLANT | MAGNOLIA, Columbia, AR | Pass | State |
| 2025-11-20 | LANXESS CORPORATION - WEST PLANT | EL DORADO, Union, AR | Incomplete | State |
| 2025-11-20 | LANXESS CORPORATION - WEST PLANT | EL DORADO, Union, AR | Pass | State |
| 2025-11-20 | RAZORBACK GATHERING COMPANY, LLC. - LITTLE RED RIVER CPF 1 | BALD KNOB, White, AR | Pass | State |
| 2025-11-20 | AMERESCO SANTA CRUZ ENERGY LLC | WATSONVILLE, Santa Cruz, CA | Pass | Local |
| 2025-11-20 | AMERESCO SANTA CRUZ ENERGY LLC | WATSONVILLE, Santa Cruz, CA | Pass | Local |
| 2025-11-20 | USMC - YERMO LOGISTICS CNTR | BARSTOW, San Bernardino, CA | Pass | Local |
| 2025-11-20 | LA CITY DWP- VALLEY GENERATING STN | SUN VALLEY, Los Angeles, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-20 | BALL WESTERN CAN COMPANY | OAKDALE, Stanislaus, CA | Fail | Local |
| 2025-11-20 | BALL WESTERN CAN COMPANY | OAKDALE, Stanislaus, CA | Pass | Local |
| 2025-11-20 | BALL WESTERN CAN COMPANY | OAKDALE, Stanislaus, CA | Pass | Local |
| 2025-11-20 | BALL WESTERN CAN COMPANY | OAKDALE, Stanislaus, CA | Fail | Local |
| 2025-11-20 | BALL WESTERN CAN COMPANY | OAKDALE, Stanislaus, CA | Fail | Local |
| 2025-11-20 | BALL WESTERN CAN COMPANY | OAKDALE, Stanislaus, CA | Pass | Local |
| 2025-11-20 | WILLIAMS FIELD - WILLOW CREEK GAS PLANT — high-priority violation on file | RIO BLANCO 18 MILES W OF, Rio Blanco, CO | Pass | State |
| 2025-11-20 | CITY OF JACKSONVILLE | BALDWIN, Duval, FL | Pass | State |
| 2025-11-20 | ARMSTRONG WORLD INDUSTRIES, INC. | PENSACOLA, Escambia, FL | Pass | State |
| 2025-11-20 | ARMSTRONG WORLD INDUSTRIES, INC. | PENSACOLA, Escambia, FL | Pass | State |
| 2025-11-20 | FLORIDA POWER & LIGHT COMPANY | PACE, Santa Rosa, FL | Pass | State |
| 2025-11-20 | GEORGIA-PACIFIC GYPSUM LLC - SAVANNAH PLANT | SAVANNAH, Chatham, GA | Pass | State |
| 2025-11-20 | GA POWER CO. PLANT YATES | NEWNAN, Coweta, GA | Pass | State |
| 2025-11-20 | SUNIVA, INC. | NORCROSS, Gwinnett, GA | Pass | State |
| 2025-11-20 | SUNIVA, INC. | NORCROSS, Gwinnett, GA | Pass | State |
| 2025-11-20 | SUNIVA, INC. | NORCROSS, Gwinnett, GA | Pass | State |
| 2025-11-20 | SUNIVA, INC. | NORCROSS, Gwinnett, GA | Pass | State |
| 2025-11-20 | CARGILL INC-EDDYVILLE | EDDYVILLE, Monroe, IA | Pass | State |
| 2025-11-20 | VALERO RENEWABLE FUELS CO LLC-FT DODGE | FORT DODGE, Webster, IA | Pass | State |
| 2025-11-20 | ITAFOS CONDA LLC - TV FACILITY | SODA SPRINGS, Caribou, ID | Pass | State |
| 2025-11-20 | KINCAID GENERATION LLC | KINCAID, Christian, IL | Pass | State |
| 2025-11-20 | SUPERIOR ALUMINUM ALLOYS LLC — high-priority violation on file | NEW HAVEN, Allen, IN | Pass | State |
| 2025-11-20 | SUPERIOR ALUMINUM ALLOYS LLC — high-priority violation on file | NEW HAVEN, Allen, IN | Pass | State |
| 2025-11-20 | SUPERIOR ALUMINUM ALLOYS LLC — high-priority violation on file | NEW HAVEN, Allen, IN | Pass | State |
| 2025-11-20 | SUPERIOR ALUMINUM ALLOYS LLC — high-priority violation on file | NEW HAVEN, Allen, IN | Pass | State |
| 2025-11-20 | GREDE LLC — high-priority violation on file | NEW CASTLE, Henry, IN | Pass | State |
| 2025-11-20 | CENTURION CONTAINER LLC | GARY, Lake, IN | Pass | State |
| 2025-11-20 | BCI SOLUTIONS INCORPORATED | BREMEN, Marshall, IN | Pass | State |
| 2025-11-20 | GARTLAND FOUNDRY CO INC — high-priority violation on file | TERRE HAUTE, Vigo, IN | Pass | State |
| 2025-11-20 | GARTLAND FOUNDRY CO INC — high-priority violation on file | TERRE HAUTE, Vigo, IN | Pass | State |
| 2025-11-20 | GARTLAND FOUNDRY CO INC — high-priority violation on file | TERRE HAUTE, Vigo, IN | Pass | State |
| 2025-11-20 | GARTLAND FOUNDRY CO INC — high-priority violation on file | TERRE HAUTE, Vigo, IN | Pass | State |
| 2025-11-20 | GARTLAND FOUNDRY CO INC — high-priority violation on file | TERRE HAUTE, Vigo, IN | Pass | State |
| 2025-11-20 | GARTLAND FOUNDRY CO INC — high-priority violation on file | TERRE HAUTE, Vigo, IN | Pass | State |
| 2025-11-20 | GARTLAND FOUNDRY CO INC — high-priority violation on file | TERRE HAUTE, Vigo, IN | Pass | State |
| 2025-11-20 | GARTLAND FOUNDRY CO INC — high-priority violation on file | TERRE HAUTE, Vigo, IN | Pass | State |
| 2025-11-20 | BAVARIAN TRUCKING COMPANY INC | WALTON, Boone, KY | Pass | State |
| 2025-11-20 | FORD MOTOR COMPANY KENTUCKY TRUCK PLANT | LOUISVILLE, Jefferson, KY | Pass | Local |
| 2025-11-20 | GLOBAL COMPANIES LLC | SOUTH PORTLAND, Cumberland, ME | Pass | State |
| 2025-11-20 | GRAYLING GENERATING STATION LTD PARTNER | GRAYLING, Crawford, MI | Pass | State |
| 2025-11-20 | CABOT CORPORATION | MIDLAND, Midland, MI | Pass | State |
| 2025-11-20 | NORTHERN NATURAL GAS - ALBERT LEA | HARTLAND, Freeborn, MN | Pass | State |
| 2025-11-20 | ALTER TRADING CORPORATION - SARDIS | SARDIS, Panola, MS | Pass | State |
| 2025-11-20 | ALTER TRADING CORPORATION - SARDIS | SARDIS, Panola, MS | Pass | State |
| 2025-11-20 | PCS PHOSPHATE COMPANY, INC. - AURORA | AURORA, Beaufort, NC | Pass | State |
| 2025-11-20 | HILAND PARTNERS HOLDINGS LLC - NORSE GAS PLANT | MCGREGOR, Divide, ND | Pass | State |
| 2025-11-20 | WATTS REGULATOR CO. | FRANKLIN, Merrimack, NH | Pass | State |
| 2025-11-20 | WILLOW LAKE GAS PROCESSING PLANT | MALAGA, Eddy, NM | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.