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 | NEW HOPE POWER COMPANY | SOUTH BAY, Palm Beach, FL | Pass | State |
| 2025-11-13 | PILGRIM'S PRIDE CORPORATION | LIVE OAK, Suwannee, FL | Pass | State |
| 2025-11-13 | PILGRIM'S PRIDE CORPORATION | LIVE OAK, Suwannee, FL | Pass | State |
| 2025-11-13 | PILGRIM'S PRIDE CORPORATION | LIVE OAK, Suwannee, FL | Pass | State |
| 2025-11-13 | PILGRIM'S PRIDE CORPORATION | LIVE OAK, Suwannee, FL | Pass | State |
| 2025-11-13 | PILGRIM'S PRIDE CORPORATION | LIVE OAK, Suwannee, FL | Pass | State |
| 2025-11-13 | PILGRIM'S PRIDE CORPORATION | LIVE OAK, Suwannee, FL | Pass | State |
| 2025-11-13 | PILGRIM'S PRIDE CORPORATION | LIVE OAK, Suwannee, FL | Pass | State |
| 2025-11-13 | PILGRIM'S PRIDE CORPORATION | LIVE OAK, Suwannee, FL | Pass | State |
| 2025-11-13 | PILGRIM'S PRIDE CORPORATION | LIVE OAK, Suwannee, FL | Pass | State |
| 2025-11-13 | PILGRIM'S PRIDE CORPORATION | LIVE OAK, Suwannee, FL | Pass | State |
| 2025-11-13 | PILGRIM'S PRIDE CORPORATION | LIVE OAK, Suwannee, FL | Pass | State |
| 2025-11-13 | PILGRIM'S PRIDE CORPORATION | LIVE OAK, Suwannee, FL | Pass | State |
| 2025-11-13 | CENTERS FOR DISEASE CONTROL AND PREVENTION (CDC) | ATLANTA, DeKalb, GA | Pass | State |
| 2025-11-13 | INTERNATIONAL PAPER COMPANY - ROME MILL | ROME, Floyd, GA | Pass | State |
| 2025-11-13 | SUNIVA, INC. | NORCROSS, Gwinnett, GA | Pass | State |
| 2025-11-13 | SUNIVA, INC. | NORCROSS, Gwinnett, GA | Pass | State |
| 2025-11-13 | GA POWER CO. - PLANT SCHERER | JULIETTE, Monroe, GA | Pass | State |
| 2025-11-13 | MECO - MAALAEA | MAALAEA, Maui, HI | Pass | State |
| 2025-11-13 | VALERO RENEWABLE FUELS LLC-CHARLES CITY | CHARLES CITY, Floyd, IA | Pass | State |
| 2025-11-13 | VALERO RENEWABLE FUELS LLC-CHARLES CITY | CHARLES CITY, Floyd, IA | Pass | State |
| 2025-11-13 | GRAIN PROCESSING CORP — high-priority violation on file | MUSCATINE, Muscatine, IA | Fail | State |
| 2025-11-13 | OSMIUM DATA CENTER — high-priority violation on file | WEST DES MOINES, Warren, IA | Fail | State |
| 2025-11-13 | CARGILL INC-CORN MILLING | CEDAR RAPIDS, Linn, IA | Pass | Local |
| 2025-11-13 | CARGILL INC-CORN MILLING | CEDAR RAPIDS, Linn, IA | Pass | Local |
| 2025-11-13 | LOUIS DREYFUS COMPANY AGRICULTURAL PRODUCTS LLC | CLAYPOOL, Kosciusko, IN | Pass | State |
| 2025-11-13 | LOUIS DREYFUS COMPANY AGRICULTURAL PRODUCTS LLC | CLAYPOOL, Kosciusko, IN | Pass | State |
| 2025-11-13 | LOUIS DREYFUS COMPANY AGRICULTURAL PRODUCTS LLC | CLAYPOOL, Kosciusko, IN | Pass | State |
| 2025-11-13 | LOUIS DREYFUS COMPANY AGRICULTURAL PRODUCTS LLC | CLAYPOOL, Kosciusko, IN | Pass | State |
| 2025-11-13 | GNB - KANSAS CITY (AIR) | KANSAS CITY, Wyandotte, KS | Pass | State |
| 2025-11-13 | SAFETY-KLEEN SYSTEMS, INC. - SMITHFIELD RECYCLE CENTER | SMITHFIELD, Henry, KY | Pass | State |
| 2025-11-13 | MARATHON PETROLEUM CO LP (KRAMERS LANE) | LOUISVILLE, Jefferson, KY | Pass | Local |
| 2025-11-13 | THE DOW CHEMICAL COMPANY U.S.A., MIDLAND — high-priority violation on file | MIDLAND, Midland, MI | Pass | State |
| 2025-11-13 | FCA US LLC - DETROIT ASSEMBLY COMPLEX — high-priority violation on file | DETROIT, Wayne, MI | Pass | State |
| 2025-11-13 | KINGSFORD MANUFACTURING COMPANY | BELLE, Maries, MO | Pass | State |
| 2025-11-13 | KINGSFORD MANUFACTURING COMPANY | BELLE, Maries, MO | Pass | State |
| 2025-11-13 | KINGSFORD MANUFACTURING COMPANY | BELLE, Maries, MO | Pass | State |
| 2025-11-13 | HANKINS LUMBER COMPANY INC, ELLIOTT — high-priority violation on file | ELLIOTT, Grenada, MS | Pass | State |
| 2025-11-13 | HANKINS LUMBER COMPANY INC, ELLIOTT — high-priority violation on file | ELLIOTT, Grenada, MS | Pass | State |
| 2025-11-13 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-11-13 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-11-13 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-11-13 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-11-13 | BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2025-11-13 | GCF US HOLDINGS LLC - NEW BERN MILL | VANCEBORO, Craven, NC | Pass | State |
| 2025-11-13 | CITY OF GREENSBORO - T.Z. OSBORNE WATER RECLAMATION FACILITY — high-priority violation on file | MCLEANSVILLE, Guilford, NC | Pass | State |
| 2025-11-13 | CII METHANE MANAGEMENT IV, LLC | SMITHFIELD, Johnston, NC | Pass | State |
| 2025-11-13 | CITY OF LAURINBURG - YARD WASTE BURN SITE | LAURINBURG, Scotland, NC | Pending | State |
| 2025-11-13 | NORTH CAROLINA STATE UNIVERSITY | RALEIGH, Wake, NC | Pass | State |
| 2025-11-13 | HILAND PARTNERS HOLDINGS LLC - RIVERS EDGE COMPRESSOR STATION | WILLISTON, McKenzie, ND | Pass | State |
| 2025-11-13 | ENTERPRISE - OXY SAND DUNES NORTH COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-11-13 | ENTERPRISE - OXY SAND DUNES NORTH COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-11-13 | ENTERPRISE - OXY SAND DUNES NORTH COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-11-13 | SPARTAN COMPRESSOR STATION | MALAGA, Eddy, NM | Pass | State |
| 2025-11-13 | NORTH CORRIDOR EAST CENTRAL GAS LIFT | MALAGA, Eddy, NM | Pass | State |
| 2025-11-13 | NORTH CORRIDOR EAST CENTRAL GAS LIFT | MALAGA, Eddy, NM | Pass | State |
| 2025-11-13 | ISLAND BOOSTER STATION | LOVING, Eddy, NM | Pass | State |
| 2025-11-13 | ALYSON TB | LA HUERTA, Eddy, NM | Pass | State |
| 2025-11-13 | MARWARI 28 CTB 2 | MALAGA, Lea, NM | Pass | State |
| 2025-11-13 | MARWARI 28 CTB 2 | MALAGA, Lea, NM | Pass | State |
| 2025-11-13 | PERSEUS COMPRESSOR STATION | MALAGA, Lea, NM | Pass | State |
| 2025-11-13 | PERSEUS COMPRESSOR STATION | MALAGA, Lea, NM | Pass | State |
| 2025-11-13 | PERSEUS COMPRESSOR STATION | MALAGA, Lea, NM | Pass | State |
| 2025-11-13 | PERSEUS COMPRESSOR STATION | MALAGA, Lea, NM | Pass | State |
| 2025-11-13 | MERCHANT COMPRESSOR STATION | EUNICE, Lea, NM | Pass | State |
| 2025-11-13 | MERCHANT COMPRESSOR STATION | EUNICE, Lea, NM | Pass | State |
| 2025-11-13 | BOLL WEEVIL 27 CTB 2 | JAL, Lea, NM | Pass | State |
| 2025-11-13 | RANGER NORTH COMPRESSOR STATION | HOBBS, Lea, NM | Pass | State |
| 2025-11-13 | U S SALT - WATKINS GLEN REFINERY | READING, Schuyler, NY | Pass | State |
| 2025-11-13 | TENNESSEE GAS PIPELINE CO COMPRESSOR STATION 224 | CLYMER, Chautauqua, NY | Pass | State |
| 2025-11-13 | GULFPORT APPALACHIA, LLC - HOWELL | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-11-13 | GULFPORT APPALACHIA, LLC - HOWELL | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-11-13 | GULFPORT APPALACHIA, LLC - HOWELL | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-11-13 | ROCKIES EXPRESS PIPELINE LLC- CHANDLERSVILLE CS | PHILO, Muskingum, OH | Pass | State |
| 2025-11-13 | MIAMI FORT POWER COMPANY LLC | NORTH BEND, Hamilton, OH | Pass | State |
| 2025-11-13 | EASTERN GAS TRANS & STORAGE/CHAMBERSBURG COMP STA | CHAMBERSBURG, Franklin, PA | Pass | State |
| 2025-11-13 | EXCO APPALACHIA MIDSTREAM LLC/SAWMILL COMP STA | KITTANNING, Armstrong, PA | Pass | State |
| 2025-11-13 | APPALACHIA MIDSTREAM SVC LLC/RED FOX CDP | FOX, Sullivan, PA | Pass | State |
| 2025-11-13 | STODDARD, T. PAD 1 | KINGSLEY, Susquehanna, PA | Pass | State |
| 2025-11-13 | CRANE, J PAD 1 — high-priority violation on file | SPRINGVILLE, Susquehanna, PA | Pass | State |
| 2025-11-13 | US MINT/PHILA | PHILADELPHIA, Philadelphia, PA | Pass | Local |
| 2025-11-13 | ARAUCO NORTH AMERICA INC — high-priority violation on file | BENNETTSVILLE, Marlboro, SC | Pending | State |
| 2025-11-13 | KING ASPHALT INC ANDERSON PLANT | ANDERSON, Anderson, SC | Pass | State |
| 2025-11-13 | PACIFICORP HUNTER | UTAH, Undetermined, UT | Pass | State |
| 2025-11-13 | APG MID-ATLANTIC - MILFORD | MILFORD, Caroline, VA | Fail | State |
| 2025-11-13 | WESTROCK LONGVIEW LLC — high-priority violation on file | LONGVIEW, Cowlitz, WA | Pass | State |
| 2025-11-13 | WESTROCK LONGVIEW LLC — high-priority violation on file | LONGVIEW, Cowlitz, WA | Pass | State |
| 2025-11-13 | PACKAGING CORPORATION OF AMERICA — high-priority violation on file | WALLULA, Walla Walla, WA | Pending | 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 | 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 |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.