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 |
|---|---|---|---|---|
| 2025-11-13 | BOLT 35 COMPRESSOR STATION (EOG RESOURCES, INC.) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-11-13 | BOLT 35 COMPRESSOR STATION (EOG RESOURCES, INC.) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-11-13 | BOLT 35 COMPRESSOR STATION (EOG RESOURCES, INC.) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-11-13 | BOLT 35 COMPRESSOR STATION (EOG RESOURCES, INC.) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-11-13 | BOLT 35 COMPRESSOR STATION (EOG RESOURCES, INC.) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-11-13 | BOLT 35 COMPRESSOR STATION (EOG RESOURCES, INC.) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-11-13 | BOLT 35 COMPRESSOR STATION (EOG RESOURCES, INC.) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-11-13 | BOLT 35 COMPRESSOR STATION (EOG RESOURCES, INC.) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-11-13 | CROSSBOW COMPRESSOR STATION (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-11-13 | CROSSBOW COMPRESSOR STATION (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-11-13 | CROSSBOW COMPRESSOR STATION (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-11-13 | CROSSBOW COMPRESSOR STATION (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-11-12 | INTERNATIONAL PAPER COMPANY — high-priority violation on file | SELMA, Dallas, AL | Pass | State |
| 2025-11-12 | INTERNATIONAL PAPER COMPANY — high-priority violation on file | SELMA, Dallas, AL | Pass | State |
| 2025-11-12 | INTERNATIONAL PAPER COMPANY — high-priority violation on file | SELMA, Dallas, AL | Pass | State |
| 2025-11-12 | INTERNATIONAL PAPER COMPANY — high-priority violation on file | SELMA, Dallas, AL | Pass | State |
| 2025-11-12 | DAIKIN AMERICA INC | DECATUR, Morgan, AL | Pass | State |
| 2025-11-12 | DESOTO GATHERING COMPANY, LLC - MIDGE CPF-1 | SEARCY, White, AR | Pass | State |
| 2025-11-12 | DESOTO GATHERING COMPANY, LLC - MIDGE CPF-1 | SEARCY, White, AR | Pass | State |
| 2025-11-12 | MCCLELLAN BUSINESS PARK — high-priority violation on file | MCCLELLAN, Sacramento, CA | Pending | Local |
| 2025-11-12 | PHILLIPS 66 COMPANY/LA REFINERY | CARSON, Los Angeles, CA | Pass | Local |
| 2025-11-12 | SENTINEL PEAK RESOURCES CA LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-12 | CRESTONE PEAK - RESERVE 3-65 35-34 | AURORA, Adams, CO | Fail | State |
| 2025-11-12 | CRESTONE PEAK - RESERVE 3-65 35-34 | AURORA, Adams, CO | Fail | State |
| 2025-11-12 | SECURE MARK DECAL | TRUMBULL, Fairfield, CT | Pass | State |
| 2025-11-12 | FLORIDA POWER & LIGHT COMPANY (PCC) | COCOA, Brevard, FL | Pass | State |
| 2025-11-12 | AMERITERPENES, LLC | JACKSONVILLE, Duval, FL | Pass | State |
| 2025-11-12 | AMERITERPENES, LLC | JACKSONVILLE, Duval, FL | Pass | State |
| 2025-11-12 | CMC STEEL US, LLC | JACKSONVILLE, Duval, FL | Pass | State |
| 2025-11-12 | CMC STEEL US, LLC | JACKSONVILLE, Duval, FL | Pass | State |
| 2025-11-12 | CMC STEEL US, LLC | JACKSONVILLE, Duval, FL | Pass | State |
| 2025-11-12 | CMC STEEL US, LLC | JACKSONVILLE, Duval, FL | Pass | State |
| 2025-11-12 | CMC STEEL US, LLC | JACKSONVILLE, Duval, FL | Pass | State |
| 2025-11-12 | CMC STEEL US, LLC | JACKSONVILLE, Duval, FL | Pass | State |
| 2025-11-12 | TAMPA ELECTRIC COMPANY (TEC) | GIBSONTON, Hillsborough, FL | Pass | State |
| 2025-11-12 | NEW HOPE POWER COMPANY | SOUTH BAY, Palm Beach, FL | Pass | State |
| 2025-11-12 | NEW HOPE POWER COMPANY | SOUTH BAY, Palm Beach, FL | Pass | State |
| 2025-11-12 | NEW HOPE POWER COMPANY | SOUTH BAY, Palm Beach, FL | Pass | State |
| 2025-11-12 | NEW HOPE POWER COMPANY | SOUTH BAY, Palm Beach, FL | Pass | State |
| 2025-11-12 | NEW HOPE POWER COMPANY | SOUTH BAY, Palm Beach, FL | Pass | State |
| 2025-11-12 | NEW HOPE POWER COMPANY | SOUTH BAY, Palm Beach, FL | Pass | State |
| 2025-11-12 | GEORGIA-PACIFIC PALATKA LLC — high-priority violation on file | PALATKA, Putnam, FL | Pass | State |
| 2025-11-12 | SEMINOLE ELECTRIC COOPERATIVE, INC. | PALATKA, Putnam, FL | Pass | State |
| 2025-11-12 | CONCORDE/INTERSPACE BATTERY GEORGIA CORPORATION | AUSTELL, Cobb, GA | Pass | State |
| 2025-11-12 | ARGLASS YAMAMURA SE, LLC — high-priority violation on file | VALDOSTA, Lowndes, GA | Pass | State |
| 2025-11-12 | ARGLASS YAMAMURA SE, LLC — high-priority violation on file | VALDOSTA, Lowndes, GA | Pass | State |
| 2025-11-12 | ARGLASS YAMAMURA SE, LLC — high-priority violation on file | VALDOSTA, Lowndes, GA | Pass | State |
| 2025-11-12 | ARGLASS YAMAMURA SE, LLC — high-priority violation on file | VALDOSTA, Lowndes, GA | Pass | State |
| 2025-11-12 | ARGLASS YAMAMURA SE, LLC — high-priority violation on file | VALDOSTA, Lowndes, GA | Pass | State |
| 2025-11-12 | ARGLASS YAMAMURA SE, LLC — high-priority violation on file | VALDOSTA, Lowndes, GA | Pass | State |
| 2025-11-12 | ARGLASS YAMAMURA SE, LLC — high-priority violation on file | VALDOSTA, Lowndes, GA | Pass | State |
| 2025-11-12 | ARGLASS YAMAMURA SE, LLC — high-priority violation on file | VALDOSTA, Lowndes, GA | Pass | State |
| 2025-11-12 | ARGLASS YAMAMURA SE, LLC — high-priority violation on file | VALDOSTA, Lowndes, GA | Pass | State |
| 2025-11-12 | ALOHA PETROLEUM - CIP | KAPOLEI, Honolulu, HI | Pass | State |
| 2025-11-12 | POET BIOREFINING - MENLO, LLC | MENLO, Guthrie, IA | Pass | State |
| 2025-11-12 | BAYER CROPSCIENCE LP 3670/6908/6909 | MUSCATINE, Muscatine, IA | Pass | State |
| 2025-11-12 | VERBIO — high-priority violation on file | NEVADA, Story, IA | Pass | State |
| 2025-11-12 | VERBIO — high-priority violation on file | NEVADA, Story, IA | Pass | State |
| 2025-11-12 | VERBIO — high-priority violation on file | NEVADA, Story, IA | Pass | State |
| 2025-11-12 | VERBIO — high-priority violation on file | NEVADA, Story, IA | Pass | State |
| 2025-11-12 | LIGHTNING RENEWABLE LLC | DESOTO, Jackson, IL | Pass | State |
| 2025-11-12 | LIGHTNING RENEWABLE LLC | DESOTO, Jackson, IL | Pass | State |
| 2025-11-12 | NORTHERN INDIANA PUBLIC SERVICE COMPANY LLC MICHIGAN CITY GE — high-priority violation on file | MICHIGAN CITY, LaPorte, IN | Pass | State |
| 2025-11-12 | NORTHERN INDIANA PUBLIC SERVICE COMPANY LLC MICHIGAN CITY GE — high-priority violation on file | MICHIGAN CITY, LaPorte, IN | Pass | State |
| 2025-11-12 | COUNTRYMARK REFINING & LOGISTICS LLC | MOUNT VERNON, Posey, IN | Pass | State |
| 2025-11-12 | COUNTRYMARK REFINING & LOGISTICS LLC | MOUNT VERNON, Posey, IN | Pass | State |
| 2025-11-12 | MPLX TERMINALS, LLC - ALGONQUIN TERMINAL | LOUISVILLE, Jefferson, KY | Pass | Local |
| 2025-11-12 | MPLX TERMINALS, LLC - ALGONQUIN TERMINAL | LOUISVILLE, Jefferson, KY | Pass | Local |
| 2025-11-12 | MID-MAINE WASTE ACTION CORPORATION | AUBURN, Androscoggin, ME | Pass | State |
| 2025-11-12 | ST MARYS CEMENT U.S. LLC, CHARLEVOIX PLANT | CHARLEVOIX, Charlevoix, MI | Fail | State |
| 2025-11-12 | KENT COUNTY WASTE TO ENERGY FACILITY | GRAND RAPIDS, Kent, MI | Pass | State |
| 2025-11-12 | CENTRAL STONE TRAUTMAN QUARRY CS-74 | PEVELY, Jefferson, MO | Pass | State |
| 2025-11-12 | CENTRAL STONE TRAUTMAN QUARRY CS-74 | PEVELY, Jefferson, MO | Pass | State |
| 2025-11-12 | THOMAS HILL ENERGY CENTER - POWER DIVISION | CLIFTON HILL, Randolph, MO | Pass | State |
| 2025-11-12 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-11-12 | CITY OF HIGH POINT - EASTSIDE WASTEWATER TREATMENT PLANT | JAMESTOWN, Guilford, NC | Pass | State |
| 2025-11-12 | CAROLINA POULTRY POWER RG3, LLC | LAGRANGE (LENOIR,NC), Lenoir, NC | Pending | State |
| 2025-11-12 | DARLING INGREDIENTS INC | BELLEVUE, Sarpy, NE | Pass | State |
| 2025-11-12 | FORTY-NINER WEST | MALAGA, Eddy, NM | Pass | State |
| 2025-11-12 | EOG - JAFAR COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-11-12 | MARWARI 28 CTB 2 | MALAGA, Lea, NM | Pass | State |
| 2025-11-12 | HELIOS COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-11-12 | GORGON LGL STATION | MALAGA, Lea, NM | Pass | State |
| 2025-11-12 | GORGON LGL STATION | MALAGA, Lea, NM | Pass | State |
| 2025-11-12 | APEX REGIONAL LANDFILL — high-priority violation on file | LAS VEGAS, Clark, NV | Pass | Local |
| 2025-11-12 | GLOBAL COMPANIES LLC - INWOOD TERMINAL | INWOOD, Nassau, NY | Pass | State |
| 2025-11-12 | PILKINGTON NORTH AMERICA INC — high-priority violation on file | ROSSFORD, Wood, OH | Pass | State |
| 2025-11-12 | PILKINGTON NORTH AMERICA INC — high-priority violation on file | ROSSFORD, Wood, OH | Pass | State |
| 2025-11-12 | EOG RESOURCES, INC. - BLUE BUTTERFLY GY VAL PAD | BUFFALO, Guernsey, OH | Pass | State |
| 2025-11-12 | EOG RESOURCES, INC. - BLUE BUTTERFLY GY VAL PAD | BUFFALO, Guernsey, OH | Pass | State |
| 2025-11-12 | EOG RESOURCES, INC. - BLUE BUTTERFLY GY VAL PAD | BUFFALO, Guernsey, OH | Pass | State |
| 2025-11-12 | EOG RESOURCES, INC. - TYGERS GY VAL PAD | BUFFALO, Guernsey, OH | Pass | State |
| 2025-11-12 | EOG RESOURCES, INC. - TYGERS GY VAL PAD | BUFFALO, Guernsey, OH | Pass | State |
| 2025-11-12 | BASF CORPORATION — high-priority violation on file | GREENVILLE, Darke, OH | Pass | State |
| 2025-11-12 | BASF CORPORATION — high-priority violation on file | GREENVILLE, Darke, OH | Pass | State |
| 2025-11-12 | BASF CORPORATION — high-priority violation on file | GREENVILLE, Darke, OH | Pass | State |
| 2025-11-12 | BASF CORPORATION — high-priority violation on file | GREENVILLE, Darke, OH | Pass | State |
| 2025-11-12 | BASF CORPORATION — high-priority violation on file | GREENVILLE, Darke, OH | Pass | State |
| 2025-11-12 | BASF CORPORATION — high-priority violation on file | GREENVILLE, Darke, OH | Pass | State |
| 2025-11-12 | BASF CORPORATION — high-priority violation on file | GREENVILLE, Darke, OH | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.