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 |
|---|---|---|---|---|
| 2025-10-24 | CONSTELLIUM ROLLED PRODUCTS RAVENSWOOD, LLC, RAVENSWOOD | RAVENSWOOD, Jackson, WV | Pass | State |
| 2025-10-23 | INTERNATIONAL PAPER COMPANY — high-priority violation on file | SELMA, Dallas, AL | Pass | State |
| 2025-10-23 | INTERNATIONAL PAPER COMPANY — high-priority violation on file | SELMA, Dallas, AL | Pass | State |
| 2025-10-23 | NUCOR TUSCALOOSA | TUSCALOOSA, Tuscaloosa, AL | Pass | State |
| 2025-10-23 | NUCOR TUSCALOOSA | TUSCALOOSA, Tuscaloosa, AL | Pass | State |
| 2025-10-23 | DESOTO GATHERING COMPANY LLC - SOUTH BROWNIE CPF 2 | HATTIEVILLE, Conway, AR | Pass | State |
| 2025-10-23 | DANSONS HOPE, LLC | HOPE, Hempstead, AR | Pass | State |
| 2025-10-23 | LSB CHEMICAL LLC | EL DORADO, Union, AR | Pass | State |
| 2025-10-23 | LSB CHEMICAL LLC | EL DORADO, Union, AR | Fail | State |
| 2025-10-23 | LSB CHEMICAL LLC | EL DORADO, Union, AR | Pass | State |
| 2025-10-23 | LSB CHEMICAL LLC | EL DORADO, Union, AR | Pass | State |
| 2025-10-23 | SACRAMENTO AREA SEWER DISTRICT | ELK GROVE, Sacramento, CA | Pending | Local |
| 2025-10-23 | PHILLIPS 66 CO/LA REFINERY WILMINGTON — high-priority violation on file | WILMINGTON, Los Angeles, CA | Pass | Local |
| 2025-10-23 | PHILLIPS 66 CO/LA REFINERY WILMINGTON — high-priority violation on file | WILMINGTON, Los Angeles, CA | Pass | Local |
| 2025-10-23 | PHILLIPS 66 CO/LA REFINERY WILMINGTON — high-priority violation on file | WILMINGTON, Los Angeles, CA | Pass | Local |
| 2025-10-23 | OWENS BROCKWAY GLASS | TRACY, San Joaquin, CA | Pass | Local |
| 2025-10-23 | OWENS BROCKWAY GLASS | TRACY, San Joaquin, CA | Pass | Local |
| 2025-10-23 | KRAFT HEINZ FOODS CO | TULARE, Tulare, CA | Pass | Local |
| 2025-10-23 | KRAFT HEINZ FOODS CO | TULARE, Tulare, CA | Pass | Local |
| 2025-10-23 | KRAFT HEINZ FOODS CO | TULARE, Tulare, CA | Pass | Local |
| 2025-10-23 | SUNCOR ENERGY - DENVER REFINERY — high-priority violation on file | COMMERCE CITY, Adams, CO | Pass | State |
| 2025-10-23 | AMRIZE PORTLAND PLANT — high-priority violation on file | FLORENCE 3.8 MI. E OF, Fremont, CO | Pass | State |
| 2025-10-23 | SEELEY OIL CO - CUTTHROAT BATTERY B | MONTEZUMA COUNTY, Montezuma, CO | Pass | State |
| 2025-10-23 | WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file | FORT LUPTON, Weld, CO | Pass | State |
| 2025-10-23 | UNIVERSITY OF CONNECTICUT STORRS CAMPUS | MANSFIELD DEPOT, Tolland, CT | Pass | State |
| 2025-10-23 | HILLSBOROUGH CTY. RESOURCE RECOVERY FAC. | TAMPA, Hillsborough, FL | Pass | State |
| 2025-10-23 | HILLSBOROUGH CTY. RESOURCE RECOVERY FAC. | TAMPA, Hillsborough, FL | Pass | State |
| 2025-10-23 | HILLSBOROUGH CTY. RESOURCE RECOVERY FAC. | TAMPA, Hillsborough, FL | Pass | State |
| 2025-10-23 | HILLSBOROUGH CTY. RESOURCE RECOVERY FAC. | TAMPA, Hillsborough, FL | Pass | State |
| 2025-10-23 | HILLSBOROUGH CTY. RESOURCE RECOVERY FAC. | TAMPA, Hillsborough, FL | Pass | State |
| 2025-10-23 | HILLSBOROUGH CTY. RESOURCE RECOVERY FAC. | TAMPA, Hillsborough, FL | Pass | State |
| 2025-10-23 | CERTAINTEED GYPSUM PALATKA, LLC | PALATKA, Putnam, FL | Pass | State |
| 2025-10-23 | CHESSER ISLAND ROAD LANDFILL, INC. | FOLKSTON, Charlton, GA | Pass | State |
| 2025-10-23 | STERILIZATION SERVICES OF GEORGIA | ATLANTA, Fulton, GA | Pass | State |
| 2025-10-23 | STERILIZATION SERVICES OF GEORGIA | ATLANTA, Fulton, GA | Pass | State |
| 2025-10-23 | CLEARWATER PAPER CORPORATION - AUGUSTA MILL — high-priority violation on file | AUGUSTA, Richmond, GA | Pass | State |
| 2025-10-23 | DUKE ENERGY INDIANA LLC EDWARDSPORT GENERATING STATION | EDWARDSPORT, Knox, IN | Pass | State |
| 2025-10-23 | NUCOR STEEL — high-priority violation on file | CRAWFORDSVILLE, Montgomery, IN | Pass | State |
| 2025-10-23 | KNAUF INSULATION INCORPORATED — high-priority violation on file | SHELBYVILLE, Shelby, IN | Pass | State |
| 2025-10-23 | KNAUF INSULATION INCORPORATED — high-priority violation on file | SHELBYVILLE, Shelby, IN | Pass | State |
| 2025-10-23 | KNAUF INSULATION INCORPORATED — high-priority violation on file | SHELBYVILLE, Shelby, IN | Pass | State |
| 2025-10-23 | KNAUF INSULATION INCORPORATED — high-priority violation on file | SHELBYVILLE, Shelby, IN | Pass | State |
| 2025-10-23 | KNAUF INSULATION INCORPORATED — high-priority violation on file | SHELBYVILLE, Shelby, IN | Pass | State |
| 2025-10-23 | KNAUF INSULATION INCORPORATED — high-priority violation on file | SHELBYVILLE, Shelby, IN | Pass | State |
| 2025-10-23 | KNAUF INSULATION INCORPORATED — high-priority violation on file | SHELBYVILLE, Shelby, IN | Pass | State |
| 2025-10-23 | KNAUF INSULATION INCORPORATED — high-priority violation on file | SHELBYVILLE, Shelby, IN | Pass | State |
| 2025-10-23 | KNAUF INSULATION INCORPORATED — high-priority violation on file | SHELBYVILLE, Shelby, IN | Pass | State |
| 2025-10-23 | KNAUF INSULATION INCORPORATED — high-priority violation on file | SHELBYVILLE, Shelby, IN | Pass | State |
| 2025-10-23 | KNAUF INSULATION INCORPORATED — high-priority violation on file | SHELBYVILLE, Shelby, IN | Pass | State |
| 2025-10-23 | KNAUF INSULATION INCORPORATED — high-priority violation on file | SHELBYVILLE, Shelby, IN | Pass | State |
| 2025-10-23 | KNAUF INSULATION INCORPORATED — high-priority violation on file | SHELBYVILLE, Shelby, IN | Pass | State |
| 2025-10-23 | KNAUF INSULATION INCORPORATED — high-priority violation on file | SHELBYVILLE, Shelby, IN | Pass | State |
| 2025-10-23 | KNAUF INSULATION INCORPORATED — high-priority violation on file | SHELBYVILLE, Shelby, IN | Pass | State |
| 2025-10-23 | EVONIK CORPORATION TIPPECANOE LABORATORIES — high-priority violation on file | LAFAYETTE, Tippecanoe, IN | Pass | State |
| 2025-10-23 | EVONIK CORPORATION TIPPECANOE LABORATORIES — high-priority violation on file | LAFAYETTE, Tippecanoe, IN | Pass | State |
| 2025-10-23 | EVONIK CORPORATION TIPPECANOE LABORATORIES — high-priority violation on file | LAFAYETTE, Tippecanoe, IN | Pass | State |
| 2025-10-23 | EVONIK CORPORATION TIPPECANOE LABORATORIES — high-priority violation on file | LAFAYETTE, Tippecanoe, IN | Pass | State |
| 2025-10-23 | EVONIK CORPORATION TIPPECANOE LABORATORIES — high-priority violation on file | LAFAYETTE, Tippecanoe, IN | Pass | State |
| 2025-10-23 | EVONIK CORPORATION TIPPECANOE LABORATORIES — high-priority violation on file | LAFAYETTE, Tippecanoe, IN | Pass | State |
| 2025-10-23 | EVONIK CORPORATION TIPPECANOE LABORATORIES — high-priority violation on file | LAFAYETTE, Tippecanoe, IN | Pass | State |
| 2025-10-23 | EVONIK CORPORATION TIPPECANOE LABORATORIES — high-priority violation on file | LAFAYETTE, Tippecanoe, IN | Pass | State |
| 2025-10-23 | MGPI PROCESSING (AIR) | ATCHISON, Atchison, KS | Pass | State |
| 2025-10-23 | HARSHMAN CONST (MASTER EQUIP LIST) (AIR) | CEDAR POINT, Marion, KS | Pass | State |
| 2025-10-23 | BIG RIVERS ELECTRIC CORP - DB WILSON STATION — high-priority violation on file | CENTERTOWN, Ohio, KY | Fail | State |
| 2025-10-23 | GENTEX OPTICS | DUDLEY, Worcester, MA | Pass | State |
| 2025-10-23 | EASTERN SANITARY LANDFILL | WHITE MARSH, Baltimore, MD | Pass | State |
| 2025-10-23 | MID-MAINE WASTE ACTION CORPORATION | AUBURN, Androscoggin, ME | Pass | State |
| 2025-10-23 | SODERBERG COMPANY, INC. | CARIBOU, Aroostook, ME | Pass | State |
| 2025-10-23 | BACKYARD FARMS, LLC | MADISON, Somerset, ME | Pass | State |
| 2025-10-23 | MARATHON PETROLEUM COMPANY LP — high-priority violation on file | DETROIT, Wayne, MI | Pass | State |
| 2025-10-23 | HEMLOCK SEMICONDUCTOR OPERATIONS LLC | HEMLOCK, Saginaw, MI | Pass | State |
| 2025-10-23 | ZEELAND FARM SERVICES, INC. — high-priority violation on file | ZEELAND, Ottawa, MI | Pass | State |
| 2025-10-23 | MARQUETTE BOARD OF LIGHT AND POWER | MARQUETTE, Marquette, MI | Pass | State |
| 2025-10-23 | AMERICAN CRYSTAL SUGAR - MOORHEAD — high-priority violation on file | MOORHEAD, Clay, MN | Pass | State |
| 2025-10-23 | EP ENGINEERED CLAYS CORPORATION — high-priority violation on file | JACKSON, Hinds, MS | Pass | State |
| 2025-10-23 | EP ENGINEERED CLAYS CORPORATION — high-priority violation on file | JACKSON, Hinds, MS | Pass | State |
| 2025-10-23 | EP ENGINEERED CLAYS CORPORATION — high-priority violation on file | JACKSON, Hinds, MS | Pass | State |
| 2025-10-23 | EP ENGINEERED CLAYS CORPORATION — high-priority violation on file | JACKSON, Hinds, MS | Pass | State |
| 2025-10-23 | AMERICAN CRYSTAL SUGAR COMPANY (ACS) - DRAYTON PLANT - AQ | DRAYTON, Pembina, ND | Pass | State |
| 2025-10-23 | AMERICAN CRYSTAL SUGAR COMPANY (ACS) - DRAYTON PLANT - AQ | DRAYTON, Pembina, ND | Pass | State |
| 2025-10-23 | HILAND PARTNERS HOLDINGS LLC - STONY CREEK COMPRESSOR STATION | WILLISTON, Williams, ND | Pass | State |
| 2025-10-23 | BRONCO COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-10-23 | BRONCO COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-10-23 | PHEASANT LGL STATION | MALAGA, Eddy, NM | Pass | State |
| 2025-10-23 | PHEASANT LGL STATION | MALAGA, Eddy, NM | Pass | State |
| 2025-10-23 | BERRY BOOSTER STATION | EUNICE, Lea, NM | Pass | State |
| 2025-10-23 | ROCCO COMPRESSOR STATION | MALAGA, Lea, NM | Pass | State |
| 2025-10-23 | QUEEN KEELY CTB | MONUMENT, Lea, NM | Pass | State |
| 2025-10-23 | NINA CORTEL COMPRESSOR STATION | MONUMENT, Lea, NM | Pass | State |
| 2025-10-23 | MERCHANT COMPRESSOR STATION | EUNICE, Lea, NM | Pass | State |
| 2025-10-23 | OVER THE LINE COMPRESSOR STATION | MONUMENT, Lea, NM | Pass | State |
| 2025-10-23 | ROSS INCINERATION SERVICES, INC. | GRAFTON, Lorain, OH | Pass | State |
| 2025-10-23 | ROSS INCINERATION SERVICES, INC. | GRAFTON, Lorain, OH | Pass | State |
| 2025-10-23 | MCINTIRE NORTH PAD 952640 | SARDIS, Monroe, OH | Pass | State |
| 2025-10-23 | MCINTIRE NORTH PAD 952640 | SARDIS, Monroe, OH | Pass | State |
| 2025-10-23 | MCINTIRE NORTH PAD 952640 | SARDIS, Monroe, OH | Pass | State |
| 2025-10-23 | ELCO CORP. — high-priority violation on file | CLEVELAND, Cuyahoga, OH | Pass | State |
| 2025-10-23 | ELCO CORP. — high-priority violation on file | CLEVELAND, Cuyahoga, OH | Pass | State |
| 2025-10-23 | GEORGIA PACIFIC GYPSUM LLC / FLETCHER GYPSUM WALLBOARD — high-priority violation on file | FLETCHER, Comanche, OK | Pass | State |
| 2025-10-23 | TEXAS EASTERN TRANS LP/BECHTELSVILLE | BECHTELSVILLE, Berks, PA | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.