EPA Air · stack tests by year
Air-emissions stack tests in 2025
- 26,633Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
States, 2025
- California 5,448
- Ohio 2,217
- New Mexico 1,801
- Indiana 1,621
- Florida 1,425
- Wyoming 1,362
- Georgia 1,234
- Oklahoma 1,229
- Pennsylvania 957
- Missouri 772
- Alabama 693
- Mississippi 689
- Arkansas 619
- Iowa 500
- Colorado 405
- Kansas 404
- Michigan 387
- Texas 308
- North Carolina 276
- Illinois 264
- Washington 263
- Wisconsin 245
- Minnesota 238
- West Virginia 224
- Delaware 212
- South Carolina 210
- Kentucky 207
- Connecticut 178
- Utah 175
- Montana 174
- Virginia 170
- Tennessee 168
- Alaska 157
- North Dakota 152
- Nebraska 145
- Maine 131
- Louisiana 129
- New York 126
- Arizona 116
- Idaho 111
- Nevada 75
- New Hampshire 59
- Massachusetts 59
- Hawaii 58
- Oregon 56
- Maryland 51
- South Dakota 46
- Rhode Island 30
- District of Columbia 28
- Puerto Rico 14
- New Jersey 11
- Vermont 4
Other years
Air-emissions stack tests recorded in 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 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 | JAS. W. GLOVER - HILO (0010) | UNKNOWN, Undetermined, HI | 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 |
| 2025-12-03 | LOUISVILLE MEDICAL CENTER STEAM PLANT | LOUISVILLE, Jefferson, KY | Pass | Local |
| 2025-12-03 | TENNESSEE GAS PIPELINE COMPANY LLC - COMPRESSOR STATION 40 500C1 | NATCHITOCHES, Natchitoches, LA | Pass | State |
| 2025-12-03 | DTE ELECTRIC COMPANY - MONROE POWER PLANT | MONROE, Monroe, MI | Pass | State |
| 2025-12-03 | MICHIGAN SUGAR COMPANY-CARO FACTORY — high-priority violation on file | CARO, Tuscola, MI | Pass | State |
| 2025-12-03 | CHOCTAW GENERATION LIMITED PARTNERSHIP, RED HILLS GENERATION FACILITY | ACKERMAN, Choctaw, MS | Pass | State |
| 2025-12-03 | CHOCTAW GENERATION LIMITED PARTNERSHIP, RED HILLS GENERATION FACILITY | ACKERMAN, Choctaw, MS | Pass | State |
| 2025-12-03 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2025-12-03 | SUNSHINE MILLS INC — high-priority violation on file | TUPELO, Lee, MS | Pass | State |
| 2025-12-03 | SUNSHINE MILLS INC — high-priority violation on file | TUPELO, Lee, MS | Pass | State |
| 2025-12-03 | SUNSHINE MILLS INC — high-priority violation on file | TUPELO, Lee, MS | Pass | State |
| 2025-12-03 | NET-ZERO RICHARDTON, LLC - RICHARDTON ETHANOL PLANT - AQ | RICHARDTON, Stark, ND | Pass | State |
| 2025-12-03 | TANGO COMPRESSOR STATION | LA HUERTA, Eddy, NM | Pass | State |
| 2025-12-03 | TANGO COMPRESSOR STATION | LA HUERTA, Eddy, NM | Pass | State |
| 2025-12-03 | CATALINA COMPRESSOR STATION | LA HUERTA, Eddy, NM | Pass | State |
| 2025-12-03 | CATALINA COMPRESSOR STATION | LA HUERTA, Eddy, NM | Pass | State |
| 2025-12-03 | LEA UNIT 14-11 CTB | MONUMENT, Lea, NM | Fail | State |
| 2025-12-03 | XTO ENERGY INC - MILLER UNIT PAD | BELLAIRE, Belmont, OH | Pass | State |
| 2025-12-03 | XTO ENERGY INC - MILLER UNIT PAD | BELLAIRE, Belmont, OH | Pass | State |
| 2025-12-03 | XTO ENERGY INC - MILLER UNIT PAD | BELLAIRE, Belmont, OH | Pass | State |
| 2025-12-03 | HF SINCLAIR TULSA REFINING LLC / TULSA REFINERY EAST — high-priority violation on file | TULSA, Tulsa, OK | Pass | State |
| 2025-12-03 | ENERGY DEVS MORGANTOWN LLC/CAERNARVON TWP | MORGANTOWN, Berks, PA | Pass | State |
| 2025-12-03 | EQUITRANS LP/JEFFERSON COMP STA | LIPPINCOTT, Greene, PA | Pass | State |
| 2025-12-03 | NFG MIDSTREAM COVINGTON LLC/KINNAN 845 WELL PAD | MIDDLEBURY, Tioga, PA | Pass | State |
| 2025-12-03 | NFG MIDSTREAM COVINGTON LLC/KEENEYVILLE COMP STA | MIDDLEBURY CTR, Tioga, PA | Pass | State |
| 2025-12-03 | BROWN UNIVERSITY | PROVIDENCE, Providence, RI | Fail | State |
| 2025-12-03 | WATEREE STATION | EASTOVER, Richland, SC | Pass | State |
| 2025-12-03 | CRUCIBLE ZINC, LLC — high-priority violation on file | CLARKSVILLE, Montgomery, TN | Fail | State |
| 2025-12-03 | TENNESSEE OPERATIONS OF EASTMAN CHEMICAL COMPANY — high-priority violation on file | KINGSPORT, Sullivan, TN | Pass | State |
| 2025-12-03 | PACIFICORP HUNTER | UTAH, Undetermined, UT | Pass | State |
| 2025-12-03 | ALIGNED DATA CENTERS IAD03 | STERLING, Loudoun, VA | Pass | State |
| 2025-12-03 | VAUGHAN-BASSETT FURNITURE COMPANY | GALAX, Galax (city), VA | Pass | State |
| 2025-12-03 | VAUGHAN-BASSETT FURNITURE COMPANY | GALAX, Galax (city), VA | Pass | State |
| 2025-12-03 | ANR PIPELINE CO - JANESVILLE COMPRESSOR | JANESVILLE, Rusk, WI | Pass | State |
| 2025-12-02 | HILCORP ALASKA, LLC / TYONEK PLATFORM | KENAI, Kenai Peninsula, AK | Pass | State |
| 2025-12-02 | STEEL DUST RECYCLING LLC | MILLPORT, Lamar, AL | Pass | State |
| 2025-12-02 | WARRIOR MET COAL GAS, LLC | BROOKWOOD, Tuscaloosa, AL | Pass | State |
| 2025-12-02 | DESOTO GATHERING COMPANY, LLC - STEELHEAD CPF-2 | CLINTON, Van Buren, AR | Pass | State |
| 2025-12-02 | CITY OF SACRAMENTO - 28TH ST LANDFILL | SACRAMENTO, Sacramento, CA | Pass | Local |
| 2025-12-02 | CALIFORNIA RESOURCES PRODUCTION CORP — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-12-02 | CALIFORNIA RESOURCES PRODUCTION CORP — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-12-02 | CALIFORNIA RESOURCES PRODUCTION CORP — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-12-02 | CALIFORNIA RESOURCES PRODUCTION CORP — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-12-02 | CALIFORNIA RESOURCES PRODUCTION CORP — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-12-02 | CALIFORNIA RESOURCES PRODUCTION CORP — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-12-02 | KIMBERLY-CLARK CORPORATION, NEW MILFORD MILL — high-priority violation on file | NEW MILFORD, Litchfield, CT | Pass | State |
| 2025-12-02 | ALGONQUIN GAS TRANSMISSION, LLC - CROMWELL COMPRESSOR STATION | CROMWELL, Middlesex, CT | Pass | State |
| 2025-12-02 | ALGONQUIN GAS TRANSMISSION, LLC - CROMWELL COMPRESSOR STATION | CROMWELL, Middlesex, CT | Pass | State |
| 2025-12-02 | QUIKRETE CONSTRUCTION MATERIALS, LLC | NEWBERRY, Alachua, FL | Pass | State |
| 2025-12-02 | QUIKRETE CONSTRUCTION MATERIALS, LLC | NEWBERRY, Alachua, FL | Pass | State |
| 2025-12-02 | QUIKRETE CONSTRUCTION MATERIALS, LLC | NEWBERRY, Alachua, FL | Pass | State |
| 2025-12-02 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-02 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-02 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-02 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-02 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-02 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-02 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-02 | BREITBURN OPERATING LP — high-priority violation on file | JAY, Santa Rosa, FL | Pass | State |
| 2025-12-02 | SOUTHERN LNG CO., LLC - ELBA ISLAND LNG TERMINAL - (KINDER MORGAN, INC.) — high-priority violation on file | SAVANNAH, Chatham, GA | Pass | State |
| 2025-12-02 | SOUTHERN LNG CO., LLC - ELBA ISLAND LNG TERMINAL - (KINDER MORGAN, INC.) — high-priority violation on file | SAVANNAH, Chatham, GA | Pass | State |
| 2025-12-02 | PIEDMONT GREEN POWER, LLC | BARNESVILLE, Lamar, GA | Pass | State |
| 2025-12-02 | PIEDMONT GREEN POWER, LLC | BARNESVILLE, Lamar, GA | Pass | State |
| 2025-12-02 | PIEDMONT GREEN POWER, LLC | BARNESVILLE, Lamar, GA | Pass | State |
| 2025-12-02 | POET BIOREFINING IOWA FALLS, LLC — high-priority violation on file | IOWA FALLS, Hardin, IA | Pass | State |
| 2025-12-02 | POET BIOREFINING IOWA FALLS, LLC — high-priority violation on file | IOWA FALLS, Hardin, IA | Pass | State |
| 2025-12-02 | NORTH SHORE GAS CO | LIBERTYVILLE, Lake, IL | Pass | State |
| 2025-12-02 | NORTH SHORE GAS CO | LIBERTYVILLE, Lake, IL | Pass | State |
| 2025-12-02 | NORTH SHORE GAS CO | LIBERTYVILLE, Lake, IL | Pass | State |
| 2025-12-02 | NORTH SHORE GAS CO | LIBERTYVILLE, Lake, IL | Pass | State |
| 2025-12-02 | NORTH SHORE GAS CO | LIBERTYVILLE, Lake, IL | Pass | State |
| 2025-12-02 | US MINERALS | COFFEEN, Montgomery, IL | Fail | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.
What this page shows
This page covers Clean Air Act facilities in the EPA air register and stack tests in 2025. It lists 26,291 stack tests recorded nationwide in 2025.