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 |
|---|---|---|---|---|
| 2025-12-01 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-01 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-01 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-01 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-01 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-01 | CATALINA COMPRESSOR STATION | LA HUERTA, Eddy, NM | Pass | State |
| 2025-12-01 | CATALINA COMPRESSOR STATION | LA HUERTA, Eddy, NM | Pass | State |
| 2025-12-01 | APOLLO B CTB | JAL, Lea, NM | Pass | State |
| 2025-12-01 | APOLLO D CTB | JAL, Lea, NM | Pass | State |
| 2025-12-01 | ANGRY ANGUS CTB | MONUMENT, Lea, NM | Pass | State |
| 2025-12-01 | EL CEDRO COMPRESSOR STATION | NAVAJO DAM, Rio Arriba, NM | N/A | State |
| 2025-12-01 | WINNEMUCCA COMPRESSOR STATION #4 | WINNEMUCCA, Humboldt, NV | Pass | State |
| 2025-12-01 | TEXAS EASTERN TRANS LP/WAYNESBURG STA | WAYNESBURG, Greene, PA | Pass | State |
| 2025-12-01 | EXCO APPLACHIA MIDSTREAM LLC/CONFER COMP STA | BURNSIDE TWP, Centre, PA | Pass | State |
| 2025-12-01 | NFG MIDSTREAM COVINGTON LLC/BREON COMP STA | MANSFIELD, Tioga, PA | Pass | State |
| 2025-12-01 | LEAVITT COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-12-01 | LEAVITT COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-12-01 | LEAVITT COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-12-01 | LEAVITT COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2025-12-01 | HF SINCLAIR PARCO REFINING LLC — high-priority violation on file | SINCLAIR, Carbon, WY | Pass | State |
| 2025-11-26 | DCP OPERATING CO - ROGGEN NGPP — high-priority violation on file | KEENESBURG 4.4 MI. E OF, Weld, CO | Pass | State |
| 2025-11-26 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-11-26 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-11-26 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-11-26 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-11-26 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-11-26 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-11-26 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-11-26 | VOSS CLARK DBA PGP CORP | JEFFERSONVILLE, Clark, IN | Pass | State |
| 2025-11-26 | VOSS CLARK DBA PGP CORP | JEFFERSONVILLE, Clark, IN | Pass | State |
| 2025-11-26 | VOSS CLARK DBA PGP CORP | JEFFERSONVILLE, Clark, IN | Pass | State |
| 2025-11-26 | VOSS CLARK DBA PGP CORP | JEFFERSONVILLE, Clark, IN | Pass | State |
| 2025-11-26 | VOSS CLARK DBA PGP CORP | JEFFERSONVILLE, Clark, IN | Pass | State |
| 2025-11-26 | EVERGY - LA CYGNE (AIR) | LA CYGNE, Linn, KS | Pass | State |
| 2025-11-26 | EVERGY - LA CYGNE (AIR) | LA CYGNE, Linn, KS | Pass | State |
| 2025-11-26 | HARSHMAN CONST (MASTER EQUIP LIST) (AIR) | CEDAR POINT, Marion, KS | Pass | State |
| 2025-11-26 | HARSHMAN CONST (MASTER EQUIP LIST) (AIR) | CEDAR POINT, Marion, KS | Pass | State |
| 2025-11-26 | EAST KY POWER COOP - SPURLOCK STATION | MAYSVILLE, Mason, KY | Pass | State |
| 2025-11-26 | MDU - GLENDIVE | GLENDIVE, Dawson, MT | Pass | State |
| 2025-11-26 | HACKBERRY COMPRESSOR STATION | WHITES CITY, Eddy, NM | Pass | State |
| 2025-11-26 | DIMENSIONS 6 GAS LIFT COMPRESSOR STATION | MALAGA, Eddy, NM | Pass | State |
| 2025-11-26 | DIMENSIONS 6 GAS LIFT COMPRESSOR STATION | MALAGA, Eddy, NM | Pass | State |
| 2025-11-26 | DIMENSIONS 6 GAS LIFT COMPRESSOR STATION | MALAGA, Eddy, NM | Pass | State |
| 2025-11-26 | ALAMO COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-11-26 | CONSOLIDATED CORTEZ & PIPELINE | CRESCENT VALLEY, Lander, NV | Pass | State |
| 2025-11-26 | TRUMBULL ENERGY CENTER | LORDSTOWN, Trumbull, OH | Pass | State |
| 2025-11-26 | TRUMBULL ENERGY CENTER | LORDSTOWN, Trumbull, OH | Pass | State |
| 2025-11-26 | TRUMBULL ENERGY CENTER | LORDSTOWN, Trumbull, OH | Pass | State |
| 2025-11-26 | TRUMBULL ENERGY CENTER | LORDSTOWN, Trumbull, OH | Pass | State |
| 2025-11-26 | TRUMBULL ENERGY CENTER | LORDSTOWN, Trumbull, OH | Pass | State |
| 2025-11-26 | TRUMBULL ENERGY CENTER | LORDSTOWN, Trumbull, OH | Pass | State |
| 2025-11-26 | TRUMBULL ENERGY CENTER | LORDSTOWN, Trumbull, OH | Pass | State |
| 2025-11-26 | TRUMBULL ENERGY CENTER | LORDSTOWN, Trumbull, OH | Pass | State |
| 2025-11-26 | TRUMBULL ENERGY CENTER | LORDSTOWN, Trumbull, OH | Pass | State |
| 2025-11-26 | TRUMBULL ENERGY CENTER | LORDSTOWN, Trumbull, OH | Pass | State |
| 2025-11-26 | TRUMBULL ENERGY CENTER | LORDSTOWN, Trumbull, OH | Pass | State |
| 2025-11-26 | TRUMBULL ENERGY CENTER | LORDSTOWN, Trumbull, OH | Pass | State |
| 2025-11-26 | TRUMBULL ENERGY CENTER | LORDSTOWN, Trumbull, OH | Pass | State |
| 2025-11-26 | TRUMBULL ENERGY CENTER | LORDSTOWN, Trumbull, OH | Pass | State |
| 2025-11-26 | ATI FLAT ROLLED PRODUCTS HOLDINGS LLC/VANDERGRIFT | VANDERGRIFT, Westmoreland, PA | Pass | State |
| 2025-11-26 | PA STATE UNIV/UNIV PARK CAMPUS | UNIVERSITY PARK, Centre, PA | Pass | State |
| 2025-11-26 | HF SINCLAIR PARCO REFINING LLC — high-priority violation on file | SINCLAIR, Carbon, WY | Pass | State |
| 2025-11-26 | HF SINCLAIR PARCO REFINING LLC — high-priority violation on file | SINCLAIR, Carbon, WY | Pass | State |
| 2025-11-25 | SANDERS LEAD CO | TROY, Pike, AL | Pass | State |
| 2025-11-25 | SANDERS LEAD CO | TROY, Pike, AL | Pass | State |
| 2025-11-25 | SANDERS LEAD CO | TROY, Pike, AL | Pass | State |
| 2025-11-25 | SANDERS LEAD CO | TROY, Pike, AL | Pass | State |
| 2025-11-25 | SANDERS LEAD CO | TROY, Pike, AL | Pass | State |
| 2025-11-25 | RAZORBACK GATHERING COMPANY, LLC. - JUDSONIA CPF 1 | JUDSONIA, White, AR | Pass | State |
| 2025-11-25 | LA CITY DWP- VALLEY GENERATING STN | SUN VALLEY, Los Angeles, CA | Pass | Local |
| 2025-11-25 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-25 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-25 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-25 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-25 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-25 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-25 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-25 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-25 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-25 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-25 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-25 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-25 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-25 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-25 | WES DJ GAS PROC - WATTENBERG PLANT | AURORA, Adams, CO | N/A | State |
| 2025-11-25 | CMC STEEL US, LLC | JACKSONVILLE, Duval, FL | Pass | State |
| 2025-11-25 | CMC STEEL US, LLC | JACKSONVILLE, Duval, FL | Pass | State |
| 2025-11-25 | WHITE SPRINGS AGRICULTURAL CHEMICALS,INC | WHITE SPRINGS, Hamilton, FL | Pass | State |
| 2025-11-25 | SEABOARD TRIUMPH FOODS, LLC — high-priority violation on file | CITY OF SIOUX CITY, Woodbury, IA | Pass | State |
| 2025-11-25 | HINSDALE HOSPITAL | HINSDALE, DuPage, IL | Pass | State |
| 2025-11-25 | HINSDALE HOSPITAL | HINSDALE, DuPage, IL | Pass | State |
| 2025-11-25 | HINSDALE HOSPITAL | HINSDALE, DuPage, IL | Pass | State |
| 2025-11-25 | HINSDALE HOSPITAL | HINSDALE, DuPage, IL | Pass | State |
| 2025-11-25 | RIVERSIDE HOSPITAL | KANKAKEE, Kankakee, IL | Pass | State |
| 2025-11-25 | RIVERSIDE HOSPITAL | KANKAKEE, Kankakee, IL | Pass | State |
| 2025-11-25 | RIVERSIDE HOSPITAL | KANKAKEE, Kankakee, IL | Pass | State |
| 2025-11-25 | ANR PIPELINE COMPANY SHELBYVILLE COMPRESSOR STATION | SHELBYVILLE, Shelby, IN | Pass | State |
| 2025-11-25 | ALCOA POWER GENERATING INC WARRICK POWER PLANT — high-priority violation on file | NEWBURGH, Warrick, IN | Pass | State |
| 2025-11-25 | BIO TOWN BIOGAS LLC & BIO TOWN AG INCORPORATED — high-priority violation on file | REYNOLDS, White, IN | Pass | State |
| 2025-11-25 | BIO TOWN BIOGAS LLC & BIO TOWN AG INCORPORATED — high-priority violation on file | REYNOLDS, White, IN | Pass | 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.