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 |
|---|---|---|---|---|
| 2025-09-24 | ANTELOPE HILLS COMPRESSOR STATION (EOG RESOURCES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-09-24 | ANTELOPE HILLS COMPRESSOR STATION (EOG RESOURCES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-09-24 | ANTELOPE HILLS COMPRESSOR STATION (EOG RESOURCES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-09-24 | ANTELOPE HILLS COMPRESSOR STATION (EOG RESOURCES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-09-24 | ANTELOPE HILLS COMPRESSOR STATION (EOG RESOURCES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-09-24 | ANTELOPE HILLS COMPRESSOR STATION (EOG RESOURCES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-09-24 | ANTELOPE HILLS COMPRESSOR STATION (EOG RESOURCES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-09-24 | ANTELOPE HILLS COMPRESSOR STATION (EOG RESOURCES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-09-24 | ANTELOPE HILLS COMPRESSOR STATION (EOG RESOURCES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-09-24 | ANTELOPE HILLS COMPRESSOR STATION (EOG RESOURCES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-09-24 | ANTELOPE HILLS COMPRESSOR STATION (EOG RESOURCES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-09-24 | ANTELOPE HILLS COMPRESSOR STATION (EOG RESOURCES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-09-24 | ANTELOPE HILLS COMPRESSOR STATION (EOG RESOURCES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-09-24 | BAGGS MAINLINE/BLUE GAP COMPRESSOR STATION (CROWHEART ENERGY, LLC) | CARBON COUNTY, Carbon, WY | Pass | State |
| 2025-09-24 | BAGGS MAINLINE/BLUE GAP COMPRESSOR STATION (CROWHEART ENERGY, LLC) | CARBON COUNTY, Carbon, WY | Pass | State |
| 2025-09-24 | BAGGS MAINLINE/BLUE GAP COMPRESSOR STATION (CROWHEART ENERGY, LLC) | CARBON COUNTY, Carbon, WY | Pass | State |
| 2025-09-24 | BAGGS MAINLINE/BLUE GAP COMPRESSOR STATION (CROWHEART ENERGY, LLC) | CARBON COUNTY, Carbon, WY | Pass | State |
| 2025-09-24 | WESTVACO FACILITY (WE SODA WYOMING LP) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2025-09-23 | COLASKA INC, DBA SECON / SECON AESCO ASPHALT PLANT | ALASKA, Undetermined, AK | Pass | State |
| 2025-09-23 | KRONOSPAN USA — high-priority violation on file | EASTABOGA, Calhoun, AL | Pass | State |
| 2025-09-23 | GEORGIA PACIFIC | PENNINGTON, Choctaw, AL | Pass | State |
| 2025-09-23 | WELLBORN CABINETS INC | ASHLAND, Clay, AL | Pass | State |
| 2025-09-23 | WELLBORN CABINETS INC | ASHLAND, Clay, AL | Pass | State |
| 2025-09-23 | GAS PROCESSORS INC | CASTLEBERRY, Conecuh, AL | Pass | State |
| 2025-09-23 | GEORGIA-PACIFIC BREWTON LLC | BREWTON, Escambia, AL | Pass | State |
| 2025-09-23 | GEORGIA-PACIFIC BREWTON LLC | BREWTON, Escambia, AL | Pass | State |
| 2025-09-23 | GEORGIA-PACIFIC BREWTON LLC | BREWTON, Escambia, AL | Pass | State |
| 2025-09-23 | HONDA MANUFACTURING OF ALABAMA LLC | LINCOLN, Talladega, AL | Pass | State |
| 2025-09-23 | ENABLE GAS TRANSMISSION, LLC - BEIRNE COMPRESSOR STATION | GURDON, Clark, AR | Pass | State |
| 2025-09-23 | AMERICAN KRAFT PAPER INDUSTRIES, LLC. | WHITE HALL, Jefferson, AR | Pass | State |
| 2025-09-23 | NUCOR YAMATO STEEL COMPANY | BLYTHEVILLE, Mississippi, AR | Pass | State |
| 2025-09-23 | DESOTO GATHERING COMPANY, LLC - COVE CREEK CPF-4 | DAMASCUS, Van Buren, AR | Pass | State |
| 2025-09-23 | DESOTO GATHERING COMPANY, LLC - COVE CREEK CPF-4 | DAMASCUS, Van Buren, AR | Pass | State |
| 2025-09-23 | MECP1 MESA INTERMEDIATE 1 | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2025-09-23 | SALT RIVER PROJECT - KYRENE GENERATING STATION — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2025-09-23 | CHEVRON USA | SACRAMENTO, Sacramento, CA | Pending | Local |
| 2025-09-23 | KERN OIL & REFINING — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-09-23 | KERN OIL & REFINING — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-09-23 | KERN OIL & REFINING — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-09-23 | KERN OIL & REFINING — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-09-23 | KERN OIL & REFINING — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-09-23 | KERN OIL & REFINING — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-09-23 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-09-23 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-09-23 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-09-23 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-09-23 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-09-23 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-09-23 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-09-23 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-09-23 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-09-23 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-09-23 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-09-23 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-09-23 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-09-23 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-09-23 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-09-23 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-09-23 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-09-23 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-09-23 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-09-23 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-09-23 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-09-23 | PLATTE RIVER POWER AUTHORITY - RAWHIDE | WELLINGTON 9.3 MI. N OF, Larimer, CO | Pass | State |
| 2025-09-23 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | DELAWARE CITY, New Castle, DE | Pass | State |
| 2025-09-23 | CEMEX CONSTRUCTION MATERIALS FL. LLC. | MIAMI, Miami-Dade, FL | Pass | State |
| 2025-09-23 | CEMEX CONSTRUCTION MATERIALS FL. LLC. | MIAMI, Miami-Dade, FL | Pass | State |
| 2025-09-23 | MCK TERMINALS, LLC — high-priority violation on file | JACKSONVILLE, Duval, FL | Pass | State |
| 2025-09-23 | MCK TERMINALS, LLC — high-priority violation on file | JACKSONVILLE, Duval, FL | Pass | State |
| 2025-09-23 | INTERNATIONAL PAPER COMPANY | CANTONMENT, Escambia, FL | Pass | State |
| 2025-09-23 | INTERNATIONAL PAPER COMPANY | CANTONMENT, Escambia, FL | Pass | State |
| 2025-09-23 | INTERNATIONAL PAPER COMPANY | CANTONMENT, Escambia, FL | Pass | State |
| 2025-09-23 | INTERNATIONAL PAPER COMPANY | CANTONMENT, Escambia, FL | Pass | State |
| 2025-09-23 | INTERNATIONAL PAPER COMPANY | CANTONMENT, Escambia, FL | Pass | State |
| 2025-09-23 | DART CONTAINER CORPORATION OF FLORIDA | PLANT CITY, Hillsborough, FL | Pass | State |
| 2025-09-23 | FLORIDA POWER & LIGHT (PMR) | INDIANTOWN, Martin, FL | Pass | State |
| 2025-09-23 | INTERNATIONAL PAPER COMPANY - PORT WENTWORTH MILL | PORT WENTWORTH, Chatham, GA | Pass | State |
| 2025-09-23 | INTERNATIONAL PAPER COMPANY - PORT WENTWORTH MILL | PORT WENTWORTH, Chatham, GA | Pass | State |
| 2025-09-23 | INTERNATIONAL PAPER COMPANY - PORT WENTWORTH MILL | PORT WENTWORTH, Chatham, GA | Pass | State |
| 2025-09-23 | INTERNATIONAL PAPER COMPANY - PORT WENTWORTH MILL | PORT WENTWORTH, Chatham, GA | Pass | State |
| 2025-09-23 | LJR FOREST PRODUCTS | SWAINSBORO, Emanuel, GA | Pass | State |
| 2025-09-23 | LJR FOREST PRODUCTS | SWAINSBORO, Emanuel, GA | Pass | State |
| 2025-09-23 | LJR FOREST PRODUCTS | SWAINSBORO, Emanuel, GA | Pass | State |
| 2025-09-23 | LJR FOREST PRODUCTS | SWAINSBORO, Emanuel, GA | Pass | State |
| 2025-09-23 | LJR FOREST PRODUCTS | SWAINSBORO, Emanuel, GA | N/A | State |
| 2025-09-23 | LJR FOREST PRODUCTS | SWAINSBORO, Emanuel, GA | Pass | State |
| 2025-09-23 | LJR FOREST PRODUCTS | SWAINSBORO, Emanuel, GA | N/A | State |
| 2025-09-23 | LJR FOREST PRODUCTS | SWAINSBORO, Emanuel, GA | N/A | State |
| 2025-09-23 | LJR FOREST PRODUCTS | SWAINSBORO, Emanuel, GA | Pass | State |
| 2025-09-23 | LJR FOREST PRODUCTS | SWAINSBORO, Emanuel, GA | Pass | State |
| 2025-09-23 | LJR FOREST PRODUCTS | SWAINSBORO, Emanuel, GA | Pass | State |
| 2025-09-23 | GA POWER CO. - PLANT SCHERER | JULIETTE, Monroe, GA | Pass | State |
| 2025-09-23 | GRACE PACIFIC - KAPAA QUARRY | KAILUA, Honolulu, HI | Pass | State |
| 2025-09-23 | RIVERSTONE GROUP INC. - STOCKTON | STOCKTON, Muscatine, IA | Pass | State |
| 2025-09-23 | INDIANA MICHIGAN POWER COMPANY DBA AEP ROCKPORT PLANT | ROCKPORT, Spencer, IN | Pass | State |
| 2025-09-23 | INDIANA MICHIGAN POWER COMPANY DBA AEP ROCKPORT PLANT | ROCKPORT, Spencer, IN | Pass | State |
| 2025-09-23 | INDIANA MICHIGAN POWER COMPANY DBA AEP ROCKPORT PLANT | ROCKPORT, Spencer, IN | Pass | State |
| 2025-09-23 | VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT | BLUFFTON, Wells, IN | Pass | State |
| 2025-09-23 | VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT | BLUFFTON, Wells, IN | Pass | State |
| 2025-09-23 | VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT | BLUFFTON, Wells, IN | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.