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 |
|---|---|---|---|---|
| 2025-08-27 | BROOKS CONSTRUCTION COMPANY INC | AUBURN, DeKalb, IN | Pass | State |
| 2025-08-27 | BROOKS CONSTRUCTION COMPANY INC | AUBURN, DeKalb, IN | Pass | State |
| 2025-08-27 | BROOKS CONSTRUCTION COMPANY INC | AUBURN, DeKalb, IN | Pass | State |
| 2025-08-27 | BROOKS CONSTRUCTION COMPANY INC | AUBURN, DeKalb, IN | Pass | State |
| 2025-08-27 | GREEN PLAINS MOUNT VERNON LLC — high-priority violation on file | MOUNT VERNON, Posey, IN | Pass | State |
| 2025-08-27 | GREEN PLAINS MOUNT VERNON LLC — high-priority violation on file | MOUNT VERNON, Posey, IN | Pass | State |
| 2025-08-27 | GREEN PLAINS MOUNT VERNON LLC — high-priority violation on file | MOUNT VERNON, Posey, IN | Pass | State |
| 2025-08-27 | GREEN PLAINS MOUNT VERNON LLC — high-priority violation on file | MOUNT VERNON, Posey, IN | Pass | State |
| 2025-08-27 | RAYBESTOS POWERTRAIN LLC | SULLIVAN, Sullivan, IN | Pass | State |
| 2025-08-27 | METALX LLC DBA METALX WABASH | WABASH, Wabash, IN | Pass | State |
| 2025-08-27 | METALX LLC DBA METALX WABASH | WABASH, Wabash, IN | Pass | State |
| 2025-08-27 | METALX LLC DBA METALX WABASH | WABASH, Wabash, IN | Pass | State |
| 2025-08-27 | SIGECO - FB CULLEY GENERATING STATION | NEWBURGH, Warrick, IN | Pass | State |
| 2025-08-27 | CABOT CORPORATION - HOPKINSVILLE FACILITY — high-priority violation on file | HOPKINSVILLE, Christian, KY | Fail | State |
| 2025-08-27 | VENTURE GLOBAL PLAQUEMINES LNG LLC - PLAQUEMINES LNG TERMINAL | PORT SULPHUR, Plaquemines, LA | Pass | State |
| 2025-08-27 | GLWA WATER RESOURCE RECOVERY FACILITY | DETROIT, Wayne, MI | Fail | State |
| 2025-08-27 | MIDLAND COGENERATION VENTURE — high-priority violation on file | MIDLAND, Midland, MI | Pass | State |
| 2025-08-27 | BAKKEN GATHERING PLANT | SIDNEY, Richland, MT | Pass | State |
| 2025-08-27 | BAKKEN GATHERING PLANT | SIDNEY, Richland, MT | Pass | State |
| 2025-08-27 | CITY OF ROCKY MOUNT PUBLIC UTILITIES, ELECTRIC SUBSTATION 9 | ROCKY MOUNT, Nash, NC | Pass | State |
| 2025-08-27 | TYSON FARMS, INC. - MONROE PROCESSING, FEED MILL, & HATCHERY | MONROE, Union, NC | Pass | State |
| 2025-08-27 | GREEN PLAINS YORK LLC — high-priority violation on file | YORK, York, NE | Pass | State |
| 2025-08-27 | PECOS COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-08-27 | PECOS COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-08-27 | WOLVERINE COMPRESSOR STATION | MALAGA, Eddy, NM | Pass | State |
| 2025-08-27 | WOLVERINE COMPRESSOR STATION | MALAGA, Eddy, NM | Pass | State |
| 2025-08-27 | TEXANA COMPRESSOR STATION | CARLSBAD, Eddy, NM | Pass | State |
| 2025-08-27 | EOG - QUAIL COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-08-27 | EOG - QUAIL COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-08-27 | EOG - QUAIL COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-08-27 | TIGER COMPRESSOR STATION | CARLSBAD, Eddy, NM | Pass | State |
| 2025-08-27 | GENIE COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-08-27 | GENIE COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-08-27 | PELICAN COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-08-27 | PELICAN COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-08-27 | RED TANKS COMPRESSOR STATION | LOVING, Lea, NM | Pass | State |
| 2025-08-27 | RED TANKS COMPRESSOR STATION | LOVING, Lea, NM | Pass | State |
| 2025-08-27 | CONSOLIDATED CORTEZ & PIPELINE | CRESCENT VALLEY, Lander, NV | Incomplete | State |
| 2025-08-27 | TRUMBULL ENERGY CENTER | LORDSTOWN, Trumbull, OH | Pass | State |
| 2025-08-27 | TRUMBULL ENERGY CENTER | LORDSTOWN, Trumbull, OH | Pass | State |
| 2025-08-27 | TRUMBULL ENERGY CENTER | LORDSTOWN, Trumbull, OH | Pass | State |
| 2025-08-27 | TRUMBULL ENERGY CENTER | LORDSTOWN, Trumbull, OH | Pass | State |
| 2025-08-27 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2025-08-27 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2025-08-27 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2025-08-27 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2025-08-27 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2025-08-27 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2025-08-27 | HONDA DEV. & MFG. OF AMERICA, LLC, EAST LIBERTY PLANT | EAST LIBERTY, Logan, OH | Pass | State |
| 2025-08-27 | ASCENT RESOURCES - UTICA, LLC - KEMPER | BELLAIRE, Belmont, OH | Pass | State |
| 2025-08-27 | ASCENT RESOURCES - UTICA, LLC - KEMPER | BELLAIRE, Belmont, OH | Pass | State |
| 2025-08-27 | ASCENT RESOURCES - UTICA, LLC - KEMPER | BELLAIRE, Belmont, OH | Pass | State |
| 2025-08-27 | IRON HORSE MIDSTREAM LLC / CRUSADER COMPRESSOR STATION | EL RENO, Canadian, OK | Pass | State |
| 2025-08-27 | IRON HORSE MIDSTREAM LLC / CRUSADER COMPRESSOR STATION | EL RENO, Canadian, OK | Pass | State |
| 2025-08-27 | TARGA PIPELINE MIDCONTINENT LLC / TIVIS COMPRESSOR STATION | RATLIFF CITY, Carter, OK | Pass | State |
| 2025-08-27 | TARGA PIPELINE MIDCONTINENT LLC / TIVIS COMPRESSOR STATION | RATLIFF CITY, Carter, OK | Pass | State |
| 2025-08-27 | BCE MACH III LLC / SCOUT 1906 1 34MH GABRIEL 34 27 19 6 3 | HENNESSEY, Kingfisher, OK | Pass | State |
| 2025-08-27 | BCE MACH III LLC / EHU 252H-259H FACILITY | HENNESSEY, Kingfisher, OK | Pass | State |
| 2025-08-27 | BCE MACH III LLC / LNU 82 4HO LNU 51 4HO LNU 50 6HO LNU 5 | CRESCENT, Kingfisher, OK | Pass | State |
| 2025-08-27 | BCE MACH III LLC / LNU 42 4HO 42 5HO 43 2HO PAD | CRESCENT, Kingfisher, OK | Pass | State |
| 2025-08-27 | BCE MACH III LLC / LNU 10 2HO PAD | CRESCENT, Kingfisher, OK | Pass | State |
| 2025-08-27 | NEW ENTERPRISE STONE & LIME CO INC/WESCOSVILLE PLT | ALLENTOWN, Lehigh, PA | Pass | State |
| 2025-08-27 | GATES FUNERAL HOME & CREMATORY LLC/GATES FUNERAL HOME — high-priority violation on file | UNIONTOWN, Fayette, PA | Pass | State |
| 2025-08-27 | SANTEE COOPER CROSS GENERATING STATION — high-priority violation on file | PINEVILLE, Berkeley, SC | Pass | State |
| 2025-08-27 | ARAUCO NORTH AMERICA INC — high-priority violation on file | BENNETTSVILLE, Marlboro, SC | Fail | State |
| 2025-08-27 | ALLEN COMBINED CYCLE PLANT - TVA | MEMPHIS, Shelby, TN | Pass | Local |
| 2025-08-27 | BLUE CUBE OPERATIONS | FREEPORT, Brazoria, TX | Pass | State |
| 2025-08-27 | EXXONMOBIL BEAUMONT REFINERY — high-priority violation on file | BEAUMONT, Jefferson, TX | Pass | State |
| 2025-08-27 | EXXONMOBIL BEAUMONT REFINERY — high-priority violation on file | BEAUMONT, Jefferson, TX | Pass | State |
| 2025-08-27 | EXXONMOBIL BEAUMONT REFINERY — high-priority violation on file | BEAUMONT, Jefferson, TX | Pass | State |
| 2025-08-27 | PORT ARTHUR REFINERY — high-priority violation on file | PORT ARTHUR, Jefferson, TX | Pass | State |
| 2025-08-27 | DOW CHEMICAL SABINE RIVER OPERATIONS — high-priority violation on file | ORANGE, Orange, TX | Pass | State |
| 2025-08-27 | WOODVILLE MILL | WOODVILLE, Tyler, TX | Pass | State |
| 2025-08-27 | WOODVILLE MILL | WOODVILLE, Tyler, TX | Pass | State |
| 2025-08-27 | GLOBAL CELLULOSE FIBERS - FRANKLIN MILL | FRANKLIN, Isle of Wight, VA | Pass | State |
| 2025-08-27 | GLOBAL CELLULOSE FIBERS - FRANKLIN MILL | FRANKLIN, Isle of Wight, VA | Pass | State |
| 2025-08-27 | WESTROCK LONGVIEW LLC — high-priority violation on file | LONGVIEW, Cowlitz, WA | Pass | State |
| 2025-08-27 | XCEL ENERGY - FRENCH ISLAND GENERATING PLANT | LA CROSSE, La Crosse, WI | Pass | State |
| 2025-08-26 | WESTROCK COATED BOARD LLC-MAHRT MILL | PHENIX CITY, Russell, AL | Pass | State |
| 2025-08-26 | WESTROCK COATED BOARD LLC-MAHRT MILL | PHENIX CITY, Russell, AL | Pass | State |
| 2025-08-26 | APAC-ALABAMA, INC. | HUNTSVILLE, Madison, AL | Pass | Local |
| 2025-08-26 | CLEARWATER PAPER CORPORATION (CYPRESS BEND) | ARKANSAS CITY, Desha, AR | Pass | State |
| 2025-08-26 | CLEARWATER PAPER CORPORATION (CYPRESS BEND) | ARKANSAS CITY, Desha, AR | Pass | State |
| 2025-08-26 | HALLIBURTON ENERGY SERVICES, INC. - MAGNET COVE | MALVERN, Hot Spring, AR | Pass | State |
| 2025-08-26 | HALLIBURTON ENERGY SERVICES, INC. - MAGNET COVE | MALVERN, Hot Spring, AR | Pass | State |
| 2025-08-26 | HALLIBURTON ENERGY SERVICES, INC. - MAGNET COVE | MALVERN, Hot Spring, AR | Pass | State |
| 2025-08-26 | HALLIBURTON ENERGY SERVICES, INC. - MAGNET COVE | MALVERN, Hot Spring, AR | Pass | State |
| 2025-08-26 | HALLIBURTON ENERGY SERVICES, INC. - MAGNET COVE | MALVERN, Hot Spring, AR | Pass | State |
| 2025-08-26 | ARAUCO NORTH AMERICA INCORPORATED | MALVERN, Hot Spring, AR | Pass | State |
| 2025-08-26 | BIG RIVER STEEL LLC | OSCEOLA, Mississippi, AR | Pass | State |
| 2025-08-26 | TESORO LOGISTICS MARINE TERMINAL 2 | LONG BEACH, Los Angeles, CA | Pass | Local |
| 2025-08-26 | PHILLIPS 66 PIPELINE - DENVER TERMINAL | COMMERCE CITY, Adams, CO | Pass | State |
| 2025-08-26 | BONANZA CRK STATE NORTH PLATTE CPF 42-26 | KERSEY 7.1 MI. N OF, Weld, CO | Pass | State |
| 2025-08-26 | SCAPA TAPE NORTH AMERICA | WINDSOR, Hartford, CT | Pass | State |
| 2025-08-26 | FLORIDA POWER & LIGHT COMPANY | LYNN HAVEN, Bay, FL | Pass | State |
| 2025-08-26 | FLORIDA POWER & LIGHT COMPANY | LYNN HAVEN, Bay, FL | Pass | State |
| 2025-08-26 | MOSAIC FERTILIZER, LLC | RIVERVIEW, Hillsborough, FL | Pass | State |
| 2025-08-26 | MOSAIC FERTILIZER, LLC | RIVERVIEW, Hillsborough, FL | Pass | State |
| 2025-08-26 | TAMPA ELECTRIC COMPANY | TAMPA, Hillsborough, FL | Pass | State |
| 2025-08-26 | TAMPA ELECTRIC COMPANY | TAMPA, Hillsborough, FL | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.