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 |
|---|---|---|---|---|
| 2025-09-22 | KERN OIL & REFINING — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-09-22 | NASA KENNEDY SPACE CENTER | JOHN F KENNEDY SPACE CENTER, Brevard, FL | Pass | State |
| 2025-09-22 | NASA KENNEDY SPACE CENTER | JOHN F KENNEDY SPACE CENTER, Brevard, FL | Pass | State |
| 2025-09-22 | CEMEX CONSTRUCTION MATERIALS FL. LLC. | MIAMI, Miami-Dade, FL | Pass | State |
| 2025-09-22 | JAX LNG LLC | JACKSONVILLE, Duval, FL | Pass | State |
| 2025-09-22 | LJR FOREST PRODUCTS | SWAINSBORO, Emanuel, GA | Pass | State |
| 2025-09-22 | LJR FOREST PRODUCTS | SWAINSBORO, Emanuel, GA | Pass | State |
| 2025-09-22 | LJR FOREST PRODUCTS | SWAINSBORO, Emanuel, GA | Pass | State |
| 2025-09-22 | LJR FOREST PRODUCTS | SWAINSBORO, Emanuel, GA | N/A | State |
| 2025-09-22 | LJR FOREST PRODUCTS | SWAINSBORO, Emanuel, GA | Pass | State |
| 2025-09-22 | LJR FOREST PRODUCTS | SWAINSBORO, Emanuel, GA | N/A | State |
| 2025-09-22 | LJR FOREST PRODUCTS | SWAINSBORO, Emanuel, GA | Pass | State |
| 2025-09-22 | LJR FOREST PRODUCTS | SWAINSBORO, Emanuel, GA | Pass | State |
| 2025-09-22 | LJR FOREST PRODUCTS | SWAINSBORO, Emanuel, GA | N/A | State |
| 2025-09-22 | GEORGIA-PACIFIC GYPSUM LLC | FORT DODGE, Webster, IA | Pass | State |
| 2025-09-22 | IDAHO MILK PRODUCTS | JEROME, Jerome, ID | Pass | State |
| 2025-09-22 | VENTURE GLOBAL PLAQUEMINES LNG LLC - PLAQUEMINES LNG TERMINAL | PORT SULPHUR, Plaquemines, LA | Pass | State |
| 2025-09-22 | MINNESOTA POWER - BOSWELL ENERGY CENTER | COHASSET, Itasca, MN | Pass | State |
| 2025-09-22 | SMMPA METHANE ENERGY FACILITY | MORA, Kanabec, MN | N/A | State |
| 2025-09-22 | FIREBALL GROUP LLC DATA CENTER — high-priority violation on file | PAPILLION, Sarpy, NE | Pass | State |
| 2025-09-22 | RIVERBEND 11-14 CTB 1 | MALAGA, Eddy, NM | Pass | State |
| 2025-09-22 | RIVERBEND 11-14 CTB 1 | MALAGA, Eddy, NM | Pass | State |
| 2025-09-22 | RJ BOOSTER STATION | LOCO HILLS, Eddy, NM | Pass | State |
| 2025-09-22 | FRAC CAT COMPRESSOR STATION | LOVING, Lea, NM | Pass | State |
| 2025-09-22 | CRAIG MILLER PAD 952413 | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-09-22 | CRAIG MILLER PAD 952413 | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-09-22 | CRAIG MILLER PAD 952413 | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-09-22 | SAWYERS PAD 952878 | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-09-22 | SAWYERS PAD 952878 | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-09-22 | SAWYERS PAD 952878 | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-09-22 | EQM GATHERING OPCO LLC/BLUE MOON COMP STA | DAISYTOWN, Washington, PA | Pass | State |
| 2025-09-22 | ECO-ENERGY STONE MOUNTAIN, LLC DBA STONE MOUNTAIN PROCESSING INLET FEED | ROGERSVILLE, Hawkins, TN | Pass | State |
| 2025-09-22 | PORT ARTHUR REFINERY — high-priority violation on file | PORT ARTHUR, Jefferson, TX | Pass | State |
| 2025-09-22 | BEAUMONT GAS TO GASOLINE PLANT — high-priority violation on file | BEAUMONT, Jefferson, TX | Pass | State |
| 2025-09-22 | BEAUMONT GAS TO GASOLINE PLANT — high-priority violation on file | BEAUMONT, Jefferson, TX | Pass | State |
| 2025-09-22 | PACIFICORP LAKESIDE (SUMMIT VINEYARD) | VINEYARD, Utah, UT | Pass | State |
| 2025-09-22 | PACIFICORP LAKESIDE (SUMMIT VINEYARD) | VINEYARD, Utah, UT | Pass | State |
| 2025-09-22 | PROCTER & GAMBLE PAPER PRODUCTS CO | GREEN BAY, Brown, WI | Pass | State |
| 2025-09-22 | STEAMBOAT PROCESSING FACILITY (THUNDER CREEK GAS SERVICES) | CONVERSE COUNTY, Converse, WY | Pass | State |
| 2025-09-22 | STEAMBOAT PROCESSING FACILITY (THUNDER CREEK GAS SERVICES) | CONVERSE COUNTY, Converse, WY | Pass | State |
| 2025-09-22 | STEAMBOAT PROCESSING FACILITY (THUNDER CREEK GAS SERVICES) | CONVERSE COUNTY, Converse, WY | Pass | State |
| 2025-09-22 | STEAMBOAT PROCESSING FACILITY (THUNDER CREEK GAS SERVICES) | CONVERSE COUNTY, Converse, WY | Pass | State |
| 2025-09-20 | RIETH RILEY CONSTRUCTION COMPANY INCORPORATED | INDIANAPOLIS, Marion, IN | Pass | State |
| 2025-09-20 | RIETH RILEY CONSTRUCTION COMPANY INCORPORATED | INDIANAPOLIS, Marion, IN | Pass | State |
| 2025-09-20 | RIETH RILEY CONSTRUCTION COMPANY INCORPORATED | INDIANAPOLIS, Marion, IN | Pass | State |
| 2025-09-20 | RIETH RILEY CONSTRUCTION COMPANY INCORPORATED | INDIANAPOLIS, Marion, IN | Pass | State |
| 2025-09-20 | LAMPE & MALPHRUS LUMBER COMPANY | SMITHFIELD, Johnston, NC | Pass | State |
| 2025-09-20 | CPV FAIRVIEW LLC/FAIRVIEW ENERGY CTR — high-priority violation on file | JOHNSTOWN, Cambria, PA | Pass | State |
| 2025-09-19 | JOHNS MANVILLE INC. | PHENIX CITY, Russell, AL | Pass | State |
| 2025-09-19 | JOHNS MANVILLE INC. | PHENIX CITY, Russell, AL | Pass | State |
| 2025-09-19 | LADW&P-HAYNES STEAM | LONG BEACH, Los Angeles, CA | Pass | Local |
| 2025-09-19 | LA CITY, DWP HARBOR GENERATING STATION | WILMINGTON, Los Angeles, CA | Pass | Local |
| 2025-09-19 | PCS NITROGEN FERTILIZER L.P. - AUGUSTA PLANT | AUGUSTA, Richmond, GA | Pass | State |
| 2025-09-19 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | BUTLER, DeKalb, IN | Pass | State |
| 2025-09-19 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | BUTLER, DeKalb, IN | Pass | State |
| 2025-09-19 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | BUTLER, DeKalb, IN | Pass | State |
| 2025-09-19 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | BUTLER, DeKalb, IN | Pass | State |
| 2025-09-19 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | BUTLER, DeKalb, IN | Pass | State |
| 2025-09-19 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | BUTLER, DeKalb, IN | Pass | State |
| 2025-09-19 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | BUTLER, DeKalb, IN | Pass | State |
| 2025-09-19 | TRUNKLINE GAS CO LLC - LONGVILLE COMPRESSOR STATION #48 | LONGVILLE, Beauregard, LA | Pass | State |
| 2025-09-19 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-09-19 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-09-19 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-09-19 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Fail | State |
| 2025-09-19 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-09-19 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-09-19 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-09-19 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-09-19 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-09-19 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-09-19 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-09-19 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-09-19 | ESI CONTRACTING (PORT-0923) | PORTABLE, Undetermined, MO | Pass | State |
| 2025-09-19 | ESI CONTRACTING (PORT-0923) | PORTABLE, Undetermined, MO | Pass | State |
| 2025-09-19 | ESI CONTRACTING (PORT-0923) | PORTABLE, Undetermined, MO | Pass | State |
| 2025-09-19 | ESI CONTRACTING (PORT-0923) | PORTABLE, Undetermined, MO | Pass | State |
| 2025-09-19 | ESI CONTRACTING (PORT-0923) | PORTABLE, Undetermined, MO | Pass | State |
| 2025-09-19 | ESI CONTRACTING (PORT-0923) | PORTABLE, Undetermined, MO | Pass | State |
| 2025-09-19 | ESI CONTRACTING (PORT-0923) | PORTABLE, Undetermined, MO | Pass | State |
| 2025-09-19 | ESI CONTRACTING (PORT-0923) | PORTABLE, Undetermined, MO | Pass | State |
| 2025-09-19 | ESI CONTRACTING (PORT-0923) | PORTABLE, Undetermined, MO | Pass | State |
| 2025-09-19 | ESI CONTRACTING (PORT-0923) | PORTABLE, Undetermined, MO | Pass | State |
| 2025-09-19 | ESI CONTRACTING (PORT-0923) | PORTABLE, Undetermined, MO | Pass | State |
| 2025-09-19 | ESI CONTRACTING (PORT-0923) | PORTABLE, Undetermined, MO | Pass | State |
| 2025-09-19 | ESI CONTRACTING (PORT-0923) | PORTABLE, Undetermined, MO | Pass | State |
| 2025-09-19 | ESI CONTRACTING (PORT-0923) | PORTABLE, Undetermined, MO | Pass | State |
| 2025-09-19 | ESI CONTRACTING (PORT-0923) | PORTABLE, Undetermined, MO | Pass | State |
| 2025-09-19 | HOM DEVELOPMENT, LLC (ACI) | EAST LAKE, Dare, NC | Pass | State |
| 2025-09-19 | BUNCOMBE COUNTY LANDFILL II | ALEXANDER, Buncombe, NC | Pass | Local |
| 2025-09-19 | ARCHER DANIELS MIDLAND COMPANY (ADM) - ENDERLIN FACILITY - AQ | ENDERLIN, Ransom, ND | Pass | State |
| 2025-09-19 | PROCLAMATION LOCALIZED GAS LIFT STATION | JAL, Lea, NM | Pass | State |
| 2025-09-19 | PROCLAMATION LOCALIZED GAS LIFT STATION | JAL, Lea, NM | Pass | State |
| 2025-09-19 | REDHAWK COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-09-19 | REDHAWK COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-09-19 | GOWANUS GENERATING STATION | BROOKLYN, Kings, NY | Pass | State |
| 2025-09-19 | TOLEDO TERMINAL HOLDINGS, LLC — high-priority violation on file | TOLEDO, Lucas, OH | Pass | State |
| 2025-09-19 | GULFPORT APPALACHIA, LLC - JONES PAD | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-09-19 | GULFPORT APPALACHIA, LLC - JONES PAD | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-09-19 | GULFPORT APPALACHIA, LLC - JONES PAD | BEALLSVILLE, Monroe, OH | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.