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 |
|---|---|---|---|---|
| 2025-09-04 | BEFESA ZINC US INC./PALMERTON — high-priority violation on file | PALMERTON, Carbon, PA | Pass | State |
| 2025-09-04 | EQT MIDSTREAM COMPANY LLC/DEEMSTON WICKS COMP STA | FREDERICKTOWN, Washington, PA | Pass | State |
| 2025-09-04 | EQM GATHERING OPCO LLC/CYGRYMUS COMP STA | NEW FREEPORT, Greene, PA | Pass | State |
| 2025-09-04 | USS/CLAIRTON WORKS — high-priority violation on file | CLAIRTON, Allegheny, PA | Pass | Local |
| 2025-09-04 | C R JACKSON INC JEFFERSON PLANT #501 | JEFFERSON, Chesterfield, SC | Pass | State |
| 2025-09-04 | NUCOR STEEL | PLYMOUTH, Box Elder, UT | Pass | State |
| 2025-09-04 | ANR PIPELINE CO.-MOUNTAIN COMPRESSOR STA | SURING, Oconto, WI | Pass | State |
| 2025-09-03 | GEORGIA PACIFIC | PENNINGTON, Choctaw, AL | Pass | State |
| 2025-09-03 | WILLIAMS MOBILE BAY PRODUCER SERVICES, LLC | CODEN, Mobile, AL | Pass | State |
| 2025-09-03 | WILLIAMS MOBILE BAY PRODUCER SERVICES, LLC | CODEN, Mobile, AL | Pass | State |
| 2025-09-03 | WARRIOR MET COAL GAS, LLC | BROOKWOOD, Tuscaloosa, AL | Pass | State |
| 2025-09-03 | ENTERGY ARKANSAS, LLC - WHITE BLUFF PLANT | REDFIELD, Jefferson, AR | Pass | State |
| 2025-09-03 | B&MP INC. | CAMDEN, Ouachita, AR | Pass | State |
| 2025-09-03 | GNB FORT SMITH LLC | FORT SMITH, Sebastian, AR | Pass | State |
| 2025-09-03 | MONTEREY ONE WATER (PREVIOUSLY MONTEREY REGIONAL WTR POLLUTION CTRL) | MARINA, Monterey, CA | Pass | Local |
| 2025-09-03 | MONTEREY ONE WATER (PREVIOUSLY MONTEREY REGIONAL WTR POLLUTION CTRL) | MARINA, Monterey, CA | Pass | Local |
| 2025-09-03 | LADW&P-HAYNES STEAM | LONG BEACH, Los Angeles, CA | Pass | Local |
| 2025-09-03 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-09-03 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-09-03 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-09-03 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-09-03 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-09-03 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-09-03 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-09-03 | BONANZA CREEK ENERGY - ANTELOPE SECTION | KERSEY 9.2 MI. E OF, Weld, CO | Pending | State |
| 2025-09-03 | BONANZA CREEK ENERGY - ANTELOPE SECTION | KERSEY 9.2 MI. E OF, Weld, CO | Pending | State |
| 2025-09-03 | PDC ENERGY - WIEDEMAN/BOOMERANG PAD — high-priority violation on file | GREELEY AREA, Weld, CO | Pass | State |
| 2025-09-03 | HARTFORD WATER POLLUTION CONTROL FACILITY — high-priority violation on file | HARTFORD, Hartford, CT | Pass | State |
| 2025-09-03 | ALGONQUIN GAS TRANSMISSION, LLC - CHAPLIN COMPRESSOR STATION | CHAPLIN, Windham, CT | Pass | State |
| 2025-09-03 | GEORGE WASHINGTON UNIVERSITY — high-priority violation on file | WASHINGTON, District of Columbia, DC | Fail | State |
| 2025-09-03 | TAMPA ELECTRIC COMPANY | TAMPA, Hillsborough, FL | Pass | State |
| 2025-09-03 | TAMPA ELECTRIC COMPANY | TAMPA, Hillsborough, FL | Pass | State |
| 2025-09-03 | INDUSTRIAL CONTAINER SERVICES - FL, LLC | ZELLWOOD, Orange, FL | Pass | State |
| 2025-09-03 | INDUSTRIAL CONTAINER SERVICES - FL, LLC | ZELLWOOD, Orange, FL | Pass | State |
| 2025-09-03 | GEORGIA POWER CO. - PLANT MCDONOUGH- ATKINSON | ATLANTA, Cobb, GA | Pass | State |
| 2025-09-03 | GEORGIA POWER CO. - PLANT MCDONOUGH- ATKINSON | ATLANTA, Cobb, GA | Pass | State |
| 2025-09-03 | BALDWIN PAVING CO., INC. - KENNESAW PLANT | KENNESAW, Cobb, GA | Pass | State |
| 2025-09-03 | TRANSCONTINENTAL ALBANY | ALBANY, Dougherty, GA | Pass | State |
| 2025-09-03 | BRUNSWICK CELLULOSE LLC | BRUNSWICK, Glynn, GA | Pass | State |
| 2025-09-03 | BRUNSWICK CELLULOSE LLC | BRUNSWICK, Glynn, GA | Pass | State |
| 2025-09-03 | STARBUCKS MANUFACTURING CORP. GEORGIA SOLUBLE PLANT (GSP) | AUGUSTA, Richmond, GA | Pass | State |
| 2025-09-03 | STARBUCKS MANUFACTURING CORP. GEORGIA SOLUBLE PLANT (GSP) | AUGUSTA, Richmond, GA | Pass | State |
| 2025-09-03 | STARBUCKS MANUFACTURING CORP. GEORGIA SOLUBLE PLANT (GSP) | AUGUSTA, Richmond, GA | Pass | State |
| 2025-09-03 | STARBUCKS MANUFACTURING CORP. GEORGIA SOLUBLE PLANT (GSP) | AUGUSTA, Richmond, GA | Pass | State |
| 2025-09-03 | STARBUCKS MANUFACTURING CORP. GEORGIA SOLUBLE PLANT (GSP) | AUGUSTA, Richmond, GA | Pass | State |
| 2025-09-03 | STARBUCKS MANUFACTURING CORP. GEORGIA SOLUBLE PLANT (GSP) | AUGUSTA, Richmond, GA | Pass | State |
| 2025-09-03 | STARBUCKS MANUFACTURING CORP. GEORGIA SOLUBLE PLANT (GSP) | AUGUSTA, Richmond, GA | Pass | State |
| 2025-09-03 | STARBUCKS MANUFACTURING CORP. GEORGIA SOLUBLE PLANT (GSP) | AUGUSTA, Richmond, GA | Pass | State |
| 2025-09-03 | STARBUCKS MANUFACTURING CORP. GEORGIA SOLUBLE PLANT (GSP) | AUGUSTA, Richmond, GA | Pass | State |
| 2025-09-03 | STARBUCKS MANUFACTURING CORP. GEORGIA SOLUBLE PLANT (GSP) | AUGUSTA, Richmond, GA | Pass | State |
| 2025-09-03 | STARBUCKS MANUFACTURING CORP. GEORGIA SOLUBLE PLANT (GSP) | AUGUSTA, Richmond, GA | Pass | State |
| 2025-09-03 | STARBUCKS MANUFACTURING CORP. GEORGIA SOLUBLE PLANT (GSP) | AUGUSTA, Richmond, GA | Pass | State |
| 2025-09-03 | GRAIN PROCESSING CORP — high-priority violation on file | MUSCATINE, Muscatine, IA | Fail | State |
| 2025-09-03 | SSAB IOWA INC — high-priority violation on file | MUSCATINE, Muscatine, IA | Pass | State |
| 2025-09-03 | SSAB IOWA INC — high-priority violation on file | MUSCATINE, Muscatine, IA | Pass | State |
| 2025-09-03 | WEST BRANCH RNG — high-priority violation on file | MAURICE, Sioux, IA | Pass | State |
| 2025-09-03 | MIDAMERICAN ENERGY CO PLEASANT HILL GDMEC | PLEASANT HILL, Polk, IA | Pass | Local |
| 2025-09-03 | KINDER MORGAN LIQUIDS TERMINALS LLC | ROCHELLE, Ogle, IL | Pass | State |
| 2025-09-03 | GENERAL MOTORS LLC FORT WAYNE ASSEMBLY — high-priority violation on file | ROANOKE, Huntington, IN | Pass | State |
| 2025-09-03 | GENERAL MOTORS LLC FORT WAYNE ASSEMBLY — high-priority violation on file | ROANOKE, Huntington, IN | Pass | State |
| 2025-09-03 | GENERAL MOTORS LLC FORT WAYNE ASSEMBLY — high-priority violation on file | ROANOKE, Huntington, IN | Pass | State |
| 2025-09-03 | GENERAL MOTORS LLC FORT WAYNE ASSEMBLY — high-priority violation on file | ROANOKE, Huntington, IN | Pass | State |
| 2025-09-03 | KANSAS ETHANOL (AIR) | LYONS, Rice, KS | Pass | State |
| 2025-09-03 | KANSAS ETHANOL (AIR) | LYONS, Rice, KS | Pass | State |
| 2025-09-03 | ECO MAINE | PORTLAND, Cumberland, ME | Pass | State |
| 2025-09-03 | NAVAL SUPPORT ACTIVITY (NSA) CUTLER | CUTLER, Washington, ME | Pass | State |
| 2025-09-03 | CORTEVA LLC — high-priority violation on file | HARBOR BEACH, Huron, MI | Pass | State |
| 2025-09-03 | KODA ENERGY, LLC — high-priority violation on file | SHAKOPEE, Scott, MN | Pass | State |
| 2025-09-03 | XCEL ENERGY - SHERBURNE COUNTY GENERATING PLANT | BECKER, Sherburne, MN | Pass | State |
| 2025-09-03 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | CENTRAL STONE COMPANY - ANTONIA CS56 | ANTONIA, Jefferson, MO | Pass | State |
| 2025-09-03 | TRANSCONTINENTAL GAS PIPE LINE COMPANY LLC, COMPRESSOR STATION 80 | HEIDELBERG, Jones, MS | Pass | State |
| 2025-09-03 | TRANSCONTINENTAL GAS PIPE LINE COMPANY LLC, COMPRESSOR STATION 80 | HEIDELBERG, Jones, MS | Pass | State |
| 2025-09-03 | TRANSCONTINENTAL GAS PIPE LINE COMPANY LLC, COMPRESSOR STATION 80 | HEIDELBERG, Jones, MS | Pass | State |
| 2025-09-03 | CORRAL 2N COMPRESSOR | MALAGA, Eddy, NM | Pass | State |
| 2025-09-03 | CORRAL 2N COMPRESSOR | MALAGA, Eddy, NM | Pass | State |
| 2025-09-03 | WHITE CITY ROAD COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-09-03 | EOG - QUAIL COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.