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 |
|---|---|---|---|---|
| 2025-08-22 | LADW&P-HAYNES STEAM | LONG BEACH, Los Angeles, CA | Pass | Local |
| 2025-08-22 | PASADENA CITY, DWP (EIS USE) | PASADENA, Los Angeles, CA | Pass | Local |
| 2025-08-22 | ENTERPRISE PRODUCTS OP- JACKRABBIT CS | PARACHUTE 9.5 MI. NW OF, Garfield, CO | Pass | State |
| 2025-08-22 | WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file | FORT LUPTON, Weld, CO | N/A | State |
| 2025-08-22 | DCP OPERATING CO - LUCERNE 2 GAS PLANT — high-priority violation on file | GREELEY AREA, Weld, CO | Pass | State |
| 2025-08-22 | TELFAIR FOREST PRODUCTS LLC | LUMBER CITY, Telfair, GA | N/A | State |
| 2025-08-22 | TELFAIR FOREST PRODUCTS LLC | LUMBER CITY, Telfair, GA | Pass | State |
| 2025-08-22 | TELFAIR FOREST PRODUCTS LLC | LUMBER CITY, Telfair, GA | N/A | State |
| 2025-08-22 | TELFAIR FOREST PRODUCTS LLC | LUMBER CITY, Telfair, GA | N/A | State |
| 2025-08-22 | TELFAIR FOREST PRODUCTS LLC | LUMBER CITY, Telfair, GA | Pass | State |
| 2025-08-22 | TELFAIR FOREST PRODUCTS LLC | LUMBER CITY, Telfair, GA | N/A | State |
| 2025-08-22 | TELFAIR FOREST PRODUCTS LLC | LUMBER CITY, Telfair, GA | N/A | State |
| 2025-08-22 | TELFAIR FOREST PRODUCTS LLC | LUMBER CITY, Telfair, GA | N/A | State |
| 2025-08-22 | TELFAIR FOREST PRODUCTS LLC | LUMBER CITY, Telfair, GA | N/A | State |
| 2025-08-22 | DOYLE ENERGY FACILITY | MONROE, Walton, GA | Pass | State |
| 2025-08-22 | CEDAR RAPIDS/LINN COUNTY SWA SITE 2 | MARION, Linn, IA | Pass | Local |
| 2025-08-22 | STRYTEN SALINA, LLC (AIR) | SALINA, Saline, KS | Pass | State |
| 2025-08-22 | APAC-KANSAS CITY SHEARS DIV (MASTER EQUIP LIST)(AIR) | LINCOLN, Lincoln, KS | Pass | State |
| 2025-08-22 | VENTURE GLOBAL PLAQUEMINES LNG LLC - PLAQUEMINES LNG TERMINAL | PORT SULPHUR, Plaquemines, LA | Pass | State |
| 2025-08-22 | RIVER CEMENT CO. DBA BUZZI UNICEM USA SELMA PLANT | FESTUS, Jefferson, MO | Fail | State |
| 2025-08-22 | RIVER CEMENT CO. DBA BUZZI UNICEM USA SELMA PLANT | FESTUS, Jefferson, MO | Pass | State |
| 2025-08-22 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-08-22 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-08-22 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-08-22 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-08-22 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-08-22 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-08-22 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-08-22 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-08-22 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-08-22 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-08-22 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-08-22 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2025-08-22 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-08-22 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-08-22 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-08-22 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-08-22 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-08-22 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-08-22 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-08-22 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2025-08-22 | AGATE LLC | LINCOLN, Lancaster, NE | Pass | Local |
| 2025-08-22 | 3 BEAR LIBBY GAS PLANT | MONUMENT, Lea, NM | Pass | State |
| 2025-08-22 | 3 BEAR LIBBY GAS PLANT | MONUMENT, Lea, NM | Pass | State |
| 2025-08-22 | GENIE COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-08-22 | GENIE COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-08-22 | CORIANDER COMPRESSOR STATION | EUNICE, Lea, NM | Pass | State |
| 2025-08-22 | CORIANDER COMPRESSOR STATION | EUNICE, Lea, NM | Pass | State |
| 2025-08-22 | GEORGIA-PACIFIC TOLEDO LLC — high-priority violation on file | TOLEDO, Lincoln, OR | N/A | State |
| 2025-08-22 | EXPAND OPERATING LLC/MARCUCCI JONES PAD | STEVENSVILLE, Bradford, PA | Pass | State |
| 2025-08-22 | CHEVRON USA | UTAH, Undetermined, UT | Pass | State |
| 2025-08-22 | CHEVRON USA | UTAH, Undetermined, UT | Pass | State |
| 2025-08-22 | WESTROCK VIRGINIA LLC - COVINGTON | COVINGTON, Covington (city), VA | Pass | State |
| 2025-08-22 | WESTROCK VIRGINIA LLC - COVINGTON | COVINGTON, Covington (city), VA | Pass | State |
| 2025-08-22 | WESTROCK VIRGINIA LLC - COVINGTON | COVINGTON, Covington (city), VA | Pass | State |
| 2025-08-22 | WESTROCK LONGVIEW LLC — high-priority violation on file | LONGVIEW, Cowlitz, WA | Pass | State |
| 2025-08-22 | KEWAUNEE RENEWABLE ENERGY LLC | CASCO, Kewaunee, WI | Pass | State |
| 2025-08-22 | QUIKRETE CONSTRUCTION MATERIALS, LLC, QUIKRETE CEMENT — high-priority violation on file | MARTINSBURG, Berkeley, WV | Pass | State |
| 2025-08-22 | QUIKRETE CONSTRUCTION MATERIALS, LLC, QUIKRETE CEMENT — high-priority violation on file | MARTINSBURG, Berkeley, WV | Pass | State |
| 2025-08-21 | SOUTHERN NATURAL GAS | SELMA, Dallas, AL | Pass | State |
| 2025-08-21 | AMRIZE CEMENT, INC. | THEODORE, Mobile, AL | Pass | State |
| 2025-08-21 | WESTROCK COATED BOARD LLC-MAHRT MILL | PHENIX CITY, Russell, AL | Pass | State |
| 2025-08-21 | WESTROCK COATED BOARD LLC-MAHRT MILL | PHENIX CITY, Russell, AL | Pass | State |
| 2025-08-21 | DESOTO GATHERING COMPANY, LLC - MIDGE CPF-5 | HEBER SPRINGS, Cleburne, AR | Pass | State |
| 2025-08-21 | ENTERGY ARKANSAS, LLC - INDEPENDENCE PLANT | NEWARK, Independence, AR | Pass | State |
| 2025-08-21 | DESOTO GATHERING COMPANY, LLC - COVE CREEK CPF-4 | DAMASCUS, Van Buren, AR | Pass | State |
| 2025-08-21 | DESOTO GATHERING COMPANY, LLC - MIDGE CPF-2 | PANGBURN, White, AR | Pass | State |
| 2025-08-21 | ARLINGTON VALLEY — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2025-08-21 | SENTINEL PEAK RESOURCES CA LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-08-21 | SENTINEL PEAK RESOURCES CA LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-08-21 | WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file | FORT LUPTON, Weld, CO | N/A | State |
| 2025-08-21 | THE MATTABASSETT DISTRICT — high-priority violation on file | CROMWELL, Middlesex, CT | Pass | State |
| 2025-08-21 | DEVON POWER LLC | DEVON, New Haven, CT | Pass | State |
| 2025-08-21 | CITGO PETROLEUM CORP | FORT LAUDERDALE, Broward, FL | Pass | State |
| 2025-08-21 | FLORIDA POWER & LIGHT COMPANY | PENSACOLA, Escambia, FL | Pass | State |
| 2025-08-21 | MOSAIC FERTILIZER LLC — high-priority violation on file | MULBERRY, Polk, FL | Pass | State |
| 2025-08-21 | MOSAIC FERTILIZER LLC — high-priority violation on file | MULBERRY, Polk, FL | Pass | State |
| 2025-08-21 | MOSAIC FERTILIZER LLC — high-priority violation on file | MULBERRY, Polk, FL | Pass | State |
| 2025-08-21 | GEORGIA POWER CO. - PLANT MCDONOUGH- ATKINSON | ATLANTA, Cobb, GA | Pass | State |
| 2025-08-21 | PITTMAN CONSTRUCTION COMPANY — high-priority violation on file | SPARTA, Hancock, GA | Pass | State |
| 2025-08-21 | PITTMAN CONSTRUCTION COMPANY — high-priority violation on file | SPARTA, Hancock, GA | Pass | State |
| 2025-08-21 | TELFAIR FOREST PRODUCTS LLC | LUMBER CITY, Telfair, GA | N/A | State |
| 2025-08-21 | TELFAIR FOREST PRODUCTS LLC | LUMBER CITY, Telfair, GA | N/A | State |
| 2025-08-21 | TELFAIR FOREST PRODUCTS LLC | LUMBER CITY, Telfair, GA | N/A | State |
| 2025-08-21 | TELFAIR FOREST PRODUCTS LLC | LUMBER CITY, Telfair, GA | N/A | State |
| 2025-08-21 | TELFAIR FOREST PRODUCTS LLC | LUMBER CITY, Telfair, GA | N/A | State |
| 2025-08-21 | TELFAIR FOREST PRODUCTS LLC | LUMBER CITY, Telfair, GA | N/A | State |
| 2025-08-21 | TELFAIR FOREST PRODUCTS LLC | LUMBER CITY, Telfair, GA | N/A | State |
| 2025-08-21 | TELFAIR FOREST PRODUCTS LLC | LUMBER CITY, Telfair, GA | Fail | State |
| 2025-08-21 | TELFAIR FOREST PRODUCTS LLC | LUMBER CITY, Telfair, GA | Pass | State |
| 2025-08-21 | DOYLE ENERGY FACILITY | MONROE, Walton, GA | Pass | State |
| 2025-08-21 | COVIA SOLUTIONS INC | OREGON, Ogle, IL | Pass | State |
| 2025-08-21 | COVIA SOLUTIONS INC | OREGON, Ogle, IL | Pass | State |
| 2025-08-21 | VALERO RENEWABLE FUELS COMPANY DBA VALERO LINDEN PLANT | LINDEN, Montgomery, IN | Pass | State |
| 2025-08-21 | VALERO RENEWABLE FUELS COMPANY DBA VALERO LINDEN PLANT | LINDEN, Montgomery, IN | Pass | State |
| 2025-08-21 | VALERO RENEWABLE FUELS COMPANY DBA VALERO LINDEN PLANT | LINDEN, Montgomery, IN | Pass | State |
| 2025-08-21 | VALERO RENEWABLE FUELS COMPANY DBA VALERO LINDEN PLANT | LINDEN, Montgomery, IN | Pass | State |
| 2025-08-21 | VALERO RENEWABLE FUELS COMPANY DBA VALERO LINDEN PLANT | LINDEN, Montgomery, IN | Pass | State |
| 2025-08-21 | VALERO RENEWABLE FUELS COMPANY DBA VALERO LINDEN PLANT | LINDEN, Montgomery, IN | Pass | State |
| 2025-08-21 | MCPHERSON MUN. POWER PLANT #3 (AIR) | MCPHERSON, McPherson, KS | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.