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 |
|---|---|---|---|---|
| 2025-12-04 | EASTON UTILITIES - WASHINGTON STREET | EASTON, Talbot, MD | Pass | State |
| 2025-12-04 | MICHIGAN SUGAR COMPANY, CROSWELL FACTORY — high-priority violation on file | CROSWELL, Sanilac, MI | Pass | State |
| 2025-12-04 | ARAUCO NORTH AMERICA | GRAYLING, Crawford, MI | Pass | State |
| 2025-12-04 | ABBOTT NORTHWESTERN HOSPITAL | MINNEAPOLIS, Hennepin, MN | Pass | State |
| 2025-12-04 | SUNSHINE MILLS INC — high-priority violation on file | TUPELO, Lee, MS | Pass | State |
| 2025-12-04 | SUNSHINE MILLS INC — high-priority violation on file | TUPELO, Lee, MS | Pass | State |
| 2025-12-04 | SUNSHINE MILLS INC — high-priority violation on file | TUPELO, Lee, MS | Pass | State |
| 2025-12-04 | SUNSHINE MILLS INC — high-priority violation on file | TUPELO, Lee, MS | Pass | State |
| 2025-12-04 | SUNSHINE MILLS INC — high-priority violation on file | TUPELO, Lee, MS | Pass | State |
| 2025-12-04 | SUNSHINE MILLS INC — high-priority violation on file | TUPELO, Lee, MS | Pass | State |
| 2025-12-04 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2025-12-04 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2025-12-04 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2025-12-04 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2025-12-04 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2025-12-04 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2025-12-04 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2025-12-04 | NC MUNICIPAL POWER AGENCY NO. 1 - HIGH POINT WATER PUMP STAT | HIGH POINT, Guilford, NC | Pass | State |
| 2025-12-04 | NC MUNICIPAL POWER AGENCY NO. 1 - HIGH POINT POLO PLANT | HIGH POINT, Guilford, NC | Pass | State |
| 2025-12-04 | RAMBO COMPRESSOR STATION | CARLSBAD, Eddy, NM | Pass | State |
| 2025-12-04 | CATALINA COMPRESSOR STATION | LA HUERTA, Eddy, NM | Pass | State |
| 2025-12-04 | CATALINA COMPRESSOR STATION | LA HUERTA, Eddy, NM | Pass | State |
| 2025-12-04 | CATALINA COMPRESSOR STATION | LA HUERTA, Eddy, NM | Pass | State |
| 2025-12-04 | CATALINA COMPRESSOR STATION | LA HUERTA, Eddy, NM | Pass | State |
| 2025-12-04 | CATALINA COMPRESSOR STATION | LA HUERTA, Eddy, NM | Pass | State |
| 2025-12-04 | CATALINA COMPRESSOR STATION | LA HUERTA, Eddy, NM | Pass | State |
| 2025-12-04 | CATALINA COMPRESSOR STATION | LA HUERTA, Eddy, NM | Pass | State |
| 2025-12-04 | CATALINA COMPRESSOR STATION | LA HUERTA, Eddy, NM | Pass | State |
| 2025-12-04 | CAMINO BOOSTER STATION | LOVING, Eddy, NM | Pass | State |
| 2025-12-04 | OVER THE LINE COMPRESSOR STATION | MONUMENT, Lea, NM | Pass | State |
| 2025-12-04 | OVER THE LINE COMPRESSOR STATION | MONUMENT, Lea, NM | Pass | State |
| 2025-12-04 | FREEPOINT ECO-SYSTEMS HEBRON | HEBRON, Licking, OH | Fail | State |
| 2025-12-04 | PLY GEM — high-priority violation on file | SIDNEY, Shelby, OH | Pass | State |
| 2025-12-04 | TAIT ELECTRIC GENERATING STATION | MORAINE, Montgomery, OH | Pass | State |
| 2025-12-04 | TAIT ELECTRIC GENERATING STATION | MORAINE, Montgomery, OH | Pass | State |
| 2025-12-04 | INTERNATIONAL PAPER | SPRINGFIELD, Lane, OR | Pass | Local |
| 2025-12-04 | GREATER HAZLETON JT SEW AUTH/WEST HAZLETON STP — high-priority violation on file | WEST HAZLETON, Luzerne, PA | Fail | State |
| 2025-12-04 | RAUSCH CREEK GENERATION LLC/FRAILEY TWP — high-priority violation on file | TREMONT, Schuylkill, PA | Pass | State |
| 2025-12-04 | GEORGIA-PACIFIC WOOD PRODUCTS LLC - PROSPERITY PLYWOOD PLANT | PROSPERITY, Newberry, SC | Pass | State |
| 2025-12-04 | MITCHELL REGIONAL LANDFILL | MITCHELL, Davison, SD | Pass | State |
| 2025-12-04 | SCOTT SOLID WASTE DISPOSAL COMPANY | ONEIDA, Scott, TN | Pass | State |
| 2025-12-04 | PACIFICORP HUNTER | UTAH, Undetermined, UT | Pass | State |
| 2025-12-04 | WALMART SUPERCENTER #5880 | FAIRFAX, Fairfax (city), VA | Fail | State |
| 2025-12-04 | D&L FOUNDRY & SUPPLY INC | MOSES LAKE, Grant, WA | Pass | State |
| 2025-12-04 | LANXESS CORPORATION — high-priority violation on file | KALAMA, Cowlitz, WA | Pass | Local |
| 2025-12-04 | ANR PIPELINE CO - JANESVILLE COMPRESSOR | JANESVILLE, Rusk, WI | Pass | State |
| 2025-12-04 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | PROCTOR, Marshall, WV | Pass | State |
| 2025-12-04 | HOUSE CREEK MAINLINE COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-12-04 | HOUSE CREEK MAINLINE COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-12-04 | HOUSE CREEK MAINLINE COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-12-04 | HOUSE CREEK MAINLINE COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-12-04 | HOUSE CREEK MAINLINE COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-12-04 | HOUSE CREEK MAINLINE COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-12-04 | HOUSE CREEK MAINLINE COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-12-04 | HOUSE CREEK MAINLINE COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-12-03 | STEEL DUST RECYCLING LLC | MILLPORT, Lamar, AL | Pass | State |
| 2025-12-03 | STEEL DUST RECYCLING LLC | MILLPORT, Lamar, AL | Pass | State |
| 2025-12-03 | MURPHY OIL USA | MONTGOMERY, Montgomery, AL | Pass | State |
| 2025-12-03 | GEORGIA-PACIFIC WOOD PRODUCTS LLC | GURDON, Clark, AR | Pass | State |
| 2025-12-03 | GEORGIA-PACIFIC WOOD PRODUCTS LLC | GURDON, Clark, AR | Pass | State |
| 2025-12-03 | DESOTO GATHERING COMPANY, LLC - COVE CREEK CPF-3 | SPRINGFIELD, Conway, AR | Pass | State |
| 2025-12-03 | NUCOR COATINGS CORPORATION - BLYTHEVILLE PLANT | BLYTHEVILLE, Mississippi, AR | Pass | State |
| 2025-12-03 | DESOTO GATHERING COMPANY, LLC - COVE CREEK CPF-2 | BEE BRANCH, Van Buren, AR | Pass | State |
| 2025-12-03 | MOSS LANDING POWER COMPANY LLC (FRMLY DYNEGY MOSS LANDING LLC) | MOSS LANDING, Monterey, CA | Pass | Local |
| 2025-12-03 | TESORO REFINING & MARKETING CO, LLC — high-priority violation on file | CARSON, Los Angeles, CA | Pass | Local |
| 2025-12-03 | SENTINEL PEAK RESOURCES CA LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-12-03 | COORSTEK INC - CLEAR CREEK VALLEY PLANT — high-priority violation on file | GOLDEN AREA, Jefferson, CO | Fail | State |
| 2025-12-03 | THE JACKSON LABORATORY FOR GENOMIC MEDICINE — high-priority violation on file | FARMINGTON, Hartford, CT | Pass | State |
| 2025-12-03 | ROHM & HAAS ELECTRONIC MATERIALS,CMP,INC | NEWARK, New Castle, DE | Pass | State |
| 2025-12-03 | CITY OF TALLAHASSEE | TALLAHASSEE, Leon, FL | Pass | State |
| 2025-12-03 | CITY OF TALLAHASSEE | TALLAHASSEE, Leon, FL | Pass | State |
| 2025-12-03 | CITY OF TALLAHASSEE | TALLAHASSEE, Leon, FL | Pass | State |
| 2025-12-03 | CITY OF TALLAHASSEE | TALLAHASSEE, Leon, FL | Pass | State |
| 2025-12-03 | CITY OF TALLAHASSEE | TALLAHASSEE, Leon, FL | Pass | State |
| 2025-12-03 | CITY OF TALLAHASSEE | TALLAHASSEE, Leon, FL | Pass | State |
| 2025-12-03 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-03 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-03 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-03 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-03 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-03 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-03 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-03 | CARLISLE EPS HOLDING, LLC | LAKELAND, Polk, FL | Pass | State |
| 2025-12-03 | DUKE ENERGY FLORIDA, LLC | LIVE OAK, Suwannee, FL | Pass | State |
| 2025-12-03 | DUKE ENERGY FLORIDA, LLC | LIVE OAK, Suwannee, FL | Pass | State |
| 2025-12-03 | DUKE ENERGY FLORIDA, LLC | LIVE OAK, Suwannee, FL | Pass | State |
| 2025-12-03 | SOUTHERN LNG CO., LLC - ELBA ISLAND LNG TERMINAL - (KINDER MORGAN, INC.) — high-priority violation on file | SAVANNAH, Chatham, GA | Pass | State |
| 2025-12-03 | SOUTHERN LNG CO., LLC - ELBA ISLAND LNG TERMINAL - (KINDER MORGAN, INC.) — high-priority violation on file | SAVANNAH, Chatham, GA | Pass | State |
| 2025-12-03 | SOUTHERN LNG CO., LLC - ELBA ISLAND LNG TERMINAL - (KINDER MORGAN, INC.) — high-priority violation on file | SAVANNAH, Chatham, GA | Pass | State |
| 2025-12-03 | SOUTHERN LNG CO., LLC - ELBA ISLAND LNG TERMINAL - (KINDER MORGAN, INC.) — high-priority violation on file | SAVANNAH, Chatham, GA | Pass | State |
| 2025-12-03 | WASHINGTON COUNTY POWER, LLC | SANDERSVILLE, Washington, GA | Pass | State |
| 2025-12-03 | POET BIOREFINING IOWA FALLS, LLC — high-priority violation on file | IOWA FALLS, Hardin, IA | Pass | State |
| 2025-12-03 | H & B CRUSHING 00380 | KUNA, Ada, ID | Pass | State |
| 2025-12-03 | H & B CRUSHING 00595 | KUNA, Ada, ID | Pass | State |
| 2025-12-03 | H & B CRUSHING 00596 | KUNA, Ada, ID | Pass | State |
| 2025-12-03 | H & B CRUSHING 00597 | KUNA, Ada, ID | Pass | State |
| 2025-12-03 | H & B CRUSHING 00598 | KUNA, Ada, ID | Pass | State |
| 2025-12-03 | H & B CRUSHING 00615 | KUNA, Ada, ID | Pass | State |
| 2025-12-03 | ID CASTINGS OF ILLINOIS LLC — high-priority violation on file | MARTINSVILLE, Clark, IL | Pass | State |
| 2025-12-03 | TENNESSEE VALLEY AUTHORITY (TVA) - SHAWNEE FOSSIL PLANT | WEST PADUCAH, McCracken, KY | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.