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 |
|---|---|---|---|---|
| 2025-08-26 | RINCON COMPRESSOR STATION | GUYTON, Effingham, GA | Pass | State |
| 2025-08-26 | RINCON COMPRESSOR STATION | GUYTON, Effingham, GA | Pass | State |
| 2025-08-26 | RINCON COMPRESSOR STATION | GUYTON, Effingham, GA | Pass | State |
| 2025-08-26 | HAWK ROAD ENERGY FACILITY | FRANKLIN, Heard, GA | Pass | State |
| 2025-08-26 | HAZLEHURST WOOD PELLETS, LLC — high-priority violation on file | HAZLEHURST, Jeff Davis, GA | N/A | State |
| 2025-08-26 | HAZLEHURST WOOD PELLETS, LLC — high-priority violation on file | HAZLEHURST, Jeff Davis, GA | Pass | State |
| 2025-08-26 | HAZLEHURST WOOD PELLETS, LLC — high-priority violation on file | HAZLEHURST, Jeff Davis, GA | Pass | State |
| 2025-08-26 | HAZLEHURST WOOD PELLETS, LLC — high-priority violation on file | HAZLEHURST, Jeff Davis, GA | N/A | State |
| 2025-08-26 | HAZLEHURST WOOD PELLETS, LLC — high-priority violation on file | HAZLEHURST, Jeff Davis, GA | Pass | State |
| 2025-08-26 | HAZLEHURST WOOD PELLETS, LLC — high-priority violation on file | HAZLEHURST, Jeff Davis, GA | Pass | State |
| 2025-08-26 | HAZLEHURST WOOD PELLETS, LLC — high-priority violation on file | HAZLEHURST, Jeff Davis, GA | N/A | State |
| 2025-08-26 | HAZLEHURST WOOD PELLETS, LLC — high-priority violation on file | HAZLEHURST, Jeff Davis, GA | Pass | State |
| 2025-08-26 | HAZLEHURST WOOD PELLETS, LLC — high-priority violation on file | HAZLEHURST, Jeff Davis, GA | N/A | State |
| 2025-08-26 | U.S. SILICA COMPANY | MILLEN, Jenkins, GA | Pass | State |
| 2025-08-26 | U.S. SILICA COMPANY | MILLEN, Jenkins, GA | Pass | State |
| 2025-08-26 | ATLANTA GAS LIGHT COMPANY - MACON LNG PLANT | MACON, Jones, GA | Pass | State |
| 2025-08-26 | CLEARWATER PAPER CORPORATION - AUGUSTA MILL — high-priority violation on file | AUGUSTA, Richmond, GA | Pass | State |
| 2025-08-26 | CLEARWATER PAPER CORPORATION - AUGUSTA MILL — high-priority violation on file | AUGUSTA, Richmond, GA | Fail | State |
| 2025-08-26 | CLEARWATER PAPER CORPORATION - AUGUSTA MILL — high-priority violation on file | AUGUSTA, Richmond, GA | Pass | State |
| 2025-08-26 | RAYONIER PERFORMANCE FIBERS, LLC | JESUP, Wayne, GA | Pass | State |
| 2025-08-26 | POET BIOREFINING CORNING — high-priority violation on file | CORNING, Adams, IA | Pass | State |
| 2025-08-26 | HEIDELBERG MATERIALS US CEMENT LLC — high-priority violation on file | MASON CITY, Cerro Gordo, IA | Pass | State |
| 2025-08-26 | MCGREGOR MUNICIPAL UTILITIES | MCGREGOR, Clayton, IA | Pass | State |
| 2025-08-26 | LOUIS DREYFUS COMPANY GRAND JUNCTION, LLC | GRAND JUNCTION, Greene, IA | Pass | State |
| 2025-08-26 | LOUIS DREYFUS COMPANY GRAND JUNCTION, LLC | GRAND JUNCTION, Greene, IA | Pass | State |
| 2025-08-26 | NATURAL GAS PIPELINE CO OF AMERICA-#107 | EMERSON, Mills, IA | Pass | State |
| 2025-08-26 | NOVELIS ALR ALUMINUM, LLC (NOVELIS DAVENPORT CASTING) | DAVENPORT, Scott, IA | Pass | State |
| 2025-08-26 | NOVELIS ALR ALUMINUM, LLC (NOVELIS DAVENPORT CASTING) | DAVENPORT, Scott, IA | Pass | State |
| 2025-08-26 | NOVELIS ALR ALUMINUM, LLC (NOVELIS DAVENPORT CASTING) | DAVENPORT, Scott, IA | Pass | State |
| 2025-08-26 | MOUNDS PRODUCTION CO LLC | MOUNDS, Pulaski, IL | Pass | State |
| 2025-08-26 | MOUNDS PRODUCTION CO LLC | MOUNDS, Pulaski, IL | Pass | State |
| 2025-08-26 | CITGO PETROLEUM CORP — high-priority violation on file | LEMONT, Will, IL | Pass | State |
| 2025-08-26 | CITGO PETROLEUM CORP — high-priority violation on file | LEMONT, Will, IL | Pass | State |
| 2025-08-26 | ARCHER DANIELS MIDLAND COMPANY — high-priority violation on file | FRANKFORT, Clinton, IN | Pass | State |
| 2025-08-26 | ARCHER DANIELS MIDLAND COMPANY — high-priority violation on file | FRANKFORT, Clinton, IN | Fail | State |
| 2025-08-26 | BLUE GRASS CHEMICAL SPECIALTIES LLC | NEW ALBANY, Floyd, IN | Pass | State |
| 2025-08-26 | HEIDELBERG MATERIALS US CEMENT LLC — high-priority violation on file | MITCHELL, Lawrence, IN | Pass | State |
| 2025-08-26 | HEIDELBERG MATERIALS US CEMENT LLC — high-priority violation on file | MITCHELL, Lawrence, IN | Pass | State |
| 2025-08-26 | GREEN PLAINS MOUNT VERNON LLC — high-priority violation on file | MOUNT VERNON, Posey, IN | Pass | State |
| 2025-08-26 | GREEN PLAINS MOUNT VERNON LLC — high-priority violation on file | MOUNT VERNON, Posey, IN | Pass | State |
| 2025-08-26 | GREEN PLAINS MOUNT VERNON LLC — high-priority violation on file | MOUNT VERNON, Posey, IN | Pass | State |
| 2025-08-26 | GREEN PLAINS MOUNT VERNON LLC — high-priority violation on file | MOUNT VERNON, Posey, IN | Pass | State |
| 2025-08-26 | GREEN PLAINS MOUNT VERNON LLC — high-priority violation on file | MOUNT VERNON, Posey, IN | Pass | State |
| 2025-08-26 | GREEN PLAINS MOUNT VERNON LLC — high-priority violation on file | MOUNT VERNON, Posey, IN | Pass | State |
| 2025-08-26 | GREEN PLAINS MOUNT VERNON LLC — high-priority violation on file | MOUNT VERNON, Posey, IN | Pass | State |
| 2025-08-26 | GREEN PLAINS MOUNT VERNON LLC — high-priority violation on file | MOUNT VERNON, Posey, IN | Pass | State |
| 2025-08-26 | GREEN PLAINS MOUNT VERNON LLC — high-priority violation on file | MOUNT VERNON, Posey, IN | Pass | State |
| 2025-08-26 | GREEN PLAINS MOUNT VERNON LLC — high-priority violation on file | MOUNT VERNON, Posey, IN | Pass | State |
| 2025-08-26 | STEEL WAREHOUSE COMPANY LLC — high-priority violation on file | SOUTH BEND, St. Joseph, IN | Pass | State |
| 2025-08-26 | STEEL WAREHOUSE COMPANY LLC — high-priority violation on file | SOUTH BEND, St. Joseph, IN | Pass | State |
| 2025-08-26 | STEEL WAREHOUSE COMPANY LLC — high-priority violation on file | SOUTH BEND, St. Joseph, IN | Pass | State |
| 2025-08-26 | STEEL WAREHOUSE COMPANY LLC — high-priority violation on file | SOUTH BEND, St. Joseph, IN | Pass | State |
| 2025-08-26 | STEEL WAREHOUSE COMPANY LLC — high-priority violation on file | SOUTH BEND, St. Joseph, IN | Pass | State |
| 2025-08-26 | RAYBESTOS POWERTRAIN LLC | SULLIVAN, Sullivan, IN | Pass | State |
| 2025-08-26 | RAYBESTOS POWERTRAIN LLC | SULLIVAN, Sullivan, IN | Pass | State |
| 2025-08-26 | RAYBESTOS POWERTRAIN LLC | SULLIVAN, Sullivan, IN | Pass | State |
| 2025-08-26 | RAYBESTOS POWERTRAIN LLC | SULLIVAN, Sullivan, IN | Pass | State |
| 2025-08-26 | RAYBESTOS POWERTRAIN LLC | SULLIVAN, Sullivan, IN | Pass | State |
| 2025-08-26 | DAVE OMARA CONTRACTOR INCORPORATED — high-priority violation on file | LAUREL, Franklin, IN | Fail | State |
| 2025-08-26 | DAVE OMARA CONTRACTOR INCORPORATED — high-priority violation on file | LAUREL, Franklin, IN | Fail | State |
| 2025-08-26 | DAVE OMARA CONTRACTOR INCORPORATED — high-priority violation on file | LAUREL, Franklin, IN | Pass | State |
| 2025-08-26 | DAVE OMARA CONTRACTOR INCORPORATED — high-priority violation on file | LAUREL, Franklin, IN | Pass | State |
| 2025-08-26 | CONTINENTAL SILVER GROVE LLC | SILVER GROVE, Campbell, KY | Pass | State |
| 2025-08-26 | T&D WOOD ENERGY LLC — high-priority violation on file | SANFORD, York, ME | Pass | State |
| 2025-08-26 | ST MARYS CEMENT U.S. LLC, CHARLEVOIX PLANT | CHARLEVOIX, Charlevoix, MI | Fail | State |
| 2025-08-26 | HIBBING PUBLIC UTILITIES COMMISSION | HIBBING, St. Louis, MN | Pass | State |
| 2025-08-26 | AUGUSTA MAIN LINE #3 (STA 051) | AUGUSTA, Lewis and Clark, MT | Pass | State |
| 2025-08-26 | AUGUSTA MAIN LINE #3 (STA 051) | AUGUSTA, Lewis and Clark, MT | Pass | State |
| 2025-08-26 | WILSON GLASS BEAD PLANT — high-priority violation on file | WILSON, Wilson, NC | Fail | State |
| 2025-08-26 | HILAND PARTNERS HOLDINGS LLC - BETHEL COMPRESSOR STATION | WILLISTON, Williams, ND | Pass | State |
| 2025-08-26 | MUD RAINWOOD PUMP STATION | OMAHA, Douglas, NE | Pass | State |
| 2025-08-26 | GREEN PLAINS YORK LLC — high-priority violation on file | YORK, York, NE | N/A | State |
| 2025-08-26 | NPPD SHELDON STATION | HALLAM, Lancaster, NE | Pass | Local |
| 2025-08-26 | POKER LAKE NO1 COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-08-26 | WOLVERINE COMPRESSOR STATION | MALAGA, Eddy, NM | Pass | State |
| 2025-08-26 | WOLVERINE COMPRESSOR STATION | MALAGA, Eddy, NM | Pass | State |
| 2025-08-26 | EOG - QUAIL COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-08-26 | EOG - QUAIL COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-08-26 | EOG - QUAIL COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-08-26 | ENERGY TRANSFER COMPANY - DOMINATOR COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-08-26 | ENERGY TRANSFER COMPANY - DOMINATOR COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-08-26 | GENIE COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-08-26 | GENIE COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-08-26 | GENIE COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-08-26 | GENIE COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-08-26 | GOLD QUARRY OPERATIONS — high-priority violation on file | CARLIN, Eureka, NV | Pass | State |
| 2025-08-26 | BABYLON RESOURCE RECOVERY FACILITY | WEST BABYLON, Suffolk, NY | Pass | State |
| 2025-08-26 | S.W. ALFALFA MILLS INC. | ARCHBOLD, Fulton, OH | Pass | State |
| 2025-08-26 | ASCENT RESOURCES - UTICA LLC - BANNOCK UNN BL | LAFFERTY, Belmont, OH | Pass | State |
| 2025-08-26 | ASCENT RESOURCES - UTICA LLC - BANNOCK UNN BL | LAFFERTY, Belmont, OH | Pass | State |
| 2025-08-26 | ASCENT RESOURCES - UTICA LLC - BANNOCK UNN BL | LAFFERTY, Belmont, OH | Pass | State |
| 2025-08-26 | ASCENT RESOURCES - UTICA, LLC - WASSMANN | BELLAIRE, Belmont, OH | Pass | State |
| 2025-08-26 | ASCENT RESOURCES - UTICA, LLC - WASSMANN | BELLAIRE, Belmont, OH | Pass | State |
| 2025-08-26 | ASCENT RESOURCES - UTICA, LLC - WASSMANN | BELLAIRE, Belmont, OH | Pass | State |
| 2025-08-26 | BARRETT PAVING - RIVER RD ASPHALT | SIDNEY, Shelby, OH | Pass | State |
| 2025-08-26 | BARRETT PAVING - RIVER RD ASPHALT | SIDNEY, Shelby, OH | Pass | State |
| 2025-08-26 | MIAMI FORT POWER COMPANY LLC | NORTH BEND, Hamilton, OH | Pass | State |
| 2025-08-26 | IRON HORSE MIDSTREAM LLC / CRUSADER COMPRESSOR STATION | EL RENO, Canadian, OK | Pass | State |
| 2025-08-26 | IRON HORSE MIDSTREAM LLC / CRUSADER COMPRESSOR STATION | EL RENO, Canadian, OK | Pass | State |
| 2025-08-26 | FORMENTERA OPERATIONS / CAROLYN 27 M1H | BISON, Garfield, OK | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.