EPA Air · stack tests by year
Air-emissions stack tests in 2023
- 26,911Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
States, 2023
- California 7,676
- Ohio 2,800
- Florida 1,589
- Indiana 1,487
- Oklahoma 1,420
- New Mexico 1,087
- Georgia 1,057
- Pennsylvania 889
- Alabama 689
- Wyoming 670
- Mississippi 625
- Arkansas 602
- Iowa 453
- Colorado 436
- Texas 395
- Missouri 328
- North Carolina 302
- Washington 283
- Wisconsin 251
- Michigan 229
- Minnesota 228
- Delaware 224
- South Carolina 222
- West Virginia 218
- Kentucky 210
- Tennessee 200
- Utah 196
- Montana 177
- Virginia 170
- North Dakota 157
- Illinois 152
- Nebraska 152
- Alaska 140
- Nevada 127
- New York 123
- Maine 111
- Connecticut 108
- Arizona 102
- Louisiana 77
- Idaho 77
- Hawaii 72
- New Hampshire 58
- New Jersey 56
- South Dakota 54
- Maryland 49
- Kansas 45
- Oregon 44
- District of Columbia 36
- Massachusetts 27
- Rhode Island 20
- Puerto Rico 6
- Vermont 5
Other years
Air-emissions stack tests recorded in 2023
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2023-11-20 | CROSSBOW COMPRESSOR STATION (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2023-11-20 | CROSSBOW COMPRESSOR STATION (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2023-11-20 | CROSSBOW COMPRESSOR STATION (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2023-11-20 | CROSSBOW COMPRESSOR STATION (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2023-11-20 | CROSSBOW COMPRESSOR STATION (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2023-11-20 | CROSSBOW COMPRESSOR STATION (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2023-11-20 | CROSSBOW COMPRESSOR STATION (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2023-11-20 | CROSSBOW COMPRESSOR STATION (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2023-11-20 | GREEN RIVER WORKS (TATA CHEMICALS (SODA ASH) PARTNERS) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2023-11-20 | GREEN RIVER WORKS (TATA CHEMICALS (SODA ASH) PARTNERS) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2023-11-19 | CALIFORNIA RESOURCES PRODUCTION CORP | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-11-19 | CALIFORNIA RESOURCES PRODUCTION CORP | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-11-19 | HPOWER | KAPOLEI, Honolulu, HI | Pass | State |
| 2023-11-19 | USDA-NATIONAL ANIMAL DISEASE CENTER & NATIONAL VETERINARY SERVICE LABORATORY | AMES, Story, IA | Pass | State |
| 2023-11-19 | USDA-NATIONAL ANIMAL DISEASE CENTER & NATIONAL VETERINARY SERVICE LABORATORY | AMES, Story, IA | Pass | State |
| 2023-11-19 | USDA-NATIONAL ANIMAL DISEASE CENTER & NATIONAL VETERINARY SERVICE LABORATORY | AMES, Story, IA | Pass | State |
| 2023-11-19 | USDA-NATIONAL ANIMAL DISEASE CENTER & NATIONAL VETERINARY SERVICE LABORATORY | AMES, Story, IA | Pass | State |
| 2023-11-19 | CENTRAL IOWA POWER COOPERATIVE | CRESTON, Union, IA | Pass | State |
| 2023-11-18 | SNOW SUMMIT LLC | BIG BEAR LAKE, San Bernardino, CA | Pass | Local |
| 2023-11-18 | GRADY-WHITE BOATS, INC. | GREENVILLE, Pitt, NC | Pass | State |
| 2023-11-17 | HILCORP ALASKA, LLC / MILNE POINT PRODUCTION FACILITY (MPU) | NORTH SLOPE BOROUGH, North Slope, AK | Pass | State |
| 2023-11-17 | C & C ASPHALT SEALING AND STRIPING INC | GUNTERSVILLE, Marshall, AL | Pass | State |
| 2023-11-17 | VERTEX REFINING ALABAMA LLC | SARALAND, Mobile, AL | Pass | State |
| 2023-11-17 | DESOTO GATHERING COMPANY, LLC - NORTH YELLOWSTONE CPF-2 | BEE BRANCH, Van Buren, AR | Pass | State |
| 2023-11-17 | SO CAL GAS CO | VALENCIA, Los Angeles, CA | Pass | Local |
| 2023-11-17 | TST INC | FONTANA, San Bernardino, CA | Pass | Local |
| 2023-11-17 | LARAMIE ENERGY - CONN CREEK GAS — high-priority violation on file | PARACHUTE 10.1 MI. W OF, Garfield, CO | Pass | State |
| 2023-11-17 | SEMINOLE ELECTRIC COOPERATIVE, INC. | BOWLING GREEN, Hardee, FL | Pass | State |
| 2023-11-17 | GOLD BOND BUILDING PRODUCTS, LLC | GIBSONTON, Hillsborough, FL | Pass | State |
| 2023-11-17 | MICRON TECHNOLOGY INC BOISE | BOISE, Ada, ID | Pass | State |
| 2023-11-17 | CLEVELAND-CLIFFS STEEL CORPORATION, ROCKPORT WORKS | ROCKPORT, Spencer, IN | Pass | State |
| 2023-11-17 | CLEVELAND-CLIFFS STEEL CORPORATION, ROCKPORT WORKS | ROCKPORT, Spencer, IN | Pass | State |
| 2023-11-17 | CLEVELAND-CLIFFS STEEL CORPORATION, ROCKPORT WORKS | ROCKPORT, Spencer, IN | Pass | State |
| 2023-11-17 | THE CHEMOURS COMPANY FC, LLC | LOUISVILLE, Jefferson, KY | Pass | Local |
| 2023-11-17 | CURTIS BAY ENERGY, LP — high-priority violation on file | BALTIMORE, Baltimore (city), MD | Fail | State |
| 2023-11-17 | THE JACKSON LABORATORY | BAR HARBOR, Hancock, ME | Pass | State |
| 2023-11-17 | CHEMOURS COMPANY FC LLC THE, DELISLE PLANT | PASS CHRISTI, Harrison, MS | Pass | State |
| 2023-11-17 | CHEMOURS COMPANY FC LLC THE, DELISLE PLANT | PASS CHRISTI, Harrison, MS | Pass | State |
| 2023-11-17 | CHEMOURS COMPANY FC LLC THE, DELISLE PLANT | PASS CHRISTI, Harrison, MS | Pass | State |
| 2023-11-17 | CHEMOURS COMPANY FC LLC THE, DELISLE PLANT | PASS CHRISTI, Harrison, MS | Pass | State |
| 2023-11-17 | GLOBAL CELLULOSE FIBERS - RIEGELWOOD MILL | RIEGELWOOD, Columbus, NC | Pass | State |
| 2023-11-17 | RICHMOND COUNTY TRANSFER FACILITY (ACI) | ROCKINGHAM, Richmond, NC | Pending | State |
| 2023-11-17 | BURTON FLAT DEEP UNIT 35 FACILITY 1 | LA HUERTA, Eddy, NM | Pass | State |
| 2023-11-17 | MARTIN MARIETTA MAGNESIA SPECIALTIES INC. | WOODVILLE, Sandusky, OH | Pass | State |
| 2023-11-17 | MARTIN MARIETTA MAGNESIA SPECIALTIES INC. | WOODVILLE, Sandusky, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ORION ENGINEERED CARBONS LLC — high-priority violation on file | BELPRE, Washington, OH | Pass | State |
| 2023-11-17 | ONEOK FIELD SERVICES CO LLC / CEDAR LAKE COMPRESSOR STATION | CALUMET, Canadian, OK | Pass | State |
| 2023-11-17 | MARKWEST OKLAHOMA GAS CO LLC / CUSTER STABILIZATION STATION | ARAPAHO, Custer, OK | Pass | State |
| 2023-11-17 | ONEOK FIELD SERVICES CO LLC / CHEROKEE COMPRESSOR STATION | ERIN SPRINGS, Garvin, OK | Pass | State |
| 2023-11-17 | DEVON ENERGY PRODUCTION CO LP / STANGL 2 PAD 2 | KINGFISHER, Kingfisher, OK | Pass | State |
| 2023-11-17 | CONTINENTAL RESOURCES / HONEYCUTT 11 15 22XHS VANARKEL 8 15 10 | BRAY, Stephens, OK | Pass | State |
| 2023-11-17 | SANDERS BROTHERS CONSTRUCTION COMPANY INC N CHARLESTON PLANT | NORTH CHARLESTON, Charleston, SC | Pass | State |
| 2023-11-17 | JONES BROS. CONTRACTORS, LLC | OLD HICKORY, Davidson, TN | Pass | Local |
| 2023-11-16 | HILCORP ALASKA, LLC / MILNE POINT PRODUCTION FACILITY (MPU) | NORTH SLOPE BOROUGH, North Slope, AK | Pass | State |
| 2023-11-16 | GOLDEN VALLEY ELECTRIC ASSOCIATION / HEALY POWER PLANT — high-priority violation on file | HEALY, Denali, AK | Pass | State |
| 2023-11-16 | SOUTHERN NATURAL GAS | HEFLIN, Cleburne, AL | Pass | State |
| 2023-11-16 | SOUTHERN NATURAL GAS | HEFLIN, Cleburne, AL | Pass | State |
| 2023-11-16 | VERTEX REFINING ALABAMA LLC | SARALAND, Mobile, AL | Pass | State |
| 2023-11-16 | WESTROCK COATED BOARD LLC-MAHRT MILL | PHENIX CITY, Russell, AL | Pass | State |
| 2023-11-16 | WESTROCK COATED BOARD LLC-MAHRT MILL | PHENIX CITY, Russell, AL | Pass | State |
| 2023-11-16 | WESTROCK COATED BOARD LLC-MAHRT MILL | PHENIX CITY, Russell, AL | Pass | State |
| 2023-11-16 | GEORGIA-PACIFIC WOOD PRODUCTS, LLC--FORDYCE OSB | FORDYCE, Calhoun, AR | Pass | State |
| 2023-11-16 | WESTERN FOODS DELTA REGION | PINE BLUFF, Jefferson, AR | Pass | State |
| 2023-11-16 | LANXESS CORPORATION - CENTRAL PLANT | EL DORADO, Union, AR | Pass | State |
| 2023-11-16 | DESOTO GATHERING COMPANY, LLC - TIGER CPF-1 | BRADFORD, White, AR | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.