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 |
|---|---|---|---|---|
| 2025-09-05 | RYOBI DIE CASTING USA INC — high-priority violation on file | SHELBYVILLE, Shelby, IN | Pass | State |
| 2025-09-05 | RYOBI DIE CASTING USA INC — high-priority violation on file | SHELBYVILLE, Shelby, IN | Pass | State |
| 2025-09-05 | RYOBI DIE CASTING USA INC — high-priority violation on file | SHELBYVILLE, Shelby, IN | Pass | State |
| 2025-09-05 | PIONEER PLASTICS CORPORATION | AUBURN, Androscoggin, ME | Pass | State |
| 2025-09-05 | NAVAL SUPPORT ACTIVITY (NSA) CUTLER | CUTLER, Washington, ME | Pass | State |
| 2025-09-05 | CONSUMERS ENERGY CO. - ZEELAND GENERATING STATION | ZEELAND, Ottawa, MI | Pass | State |
| 2025-09-05 | TROJAN HORSE COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-09-05 | MOCKINGBIRD COMPRESSOR STATION | LOVING, Lea, NM | Pass | State |
| 2025-09-05 | CERRO COLORADO LANDFILL (FACILITY) | ALBUQUERQUE, Bernalillo, NM | Pass | Local |
| 2025-09-05 | TRAILWAY WOOD II | DUNDEE, Tuscarawas, OH | Pass | State |
| 2025-09-05 | TRAILWAY WOOD II | DUNDEE, Tuscarawas, OH | Pass | State |
| 2025-09-05 | TRAILWAY WOOD II | DUNDEE, Tuscarawas, OH | Pass | State |
| 2025-09-05 | TRAILWAY WOOD II | DUNDEE, Tuscarawas, OH | Pass | State |
| 2025-09-05 | TRAILWAY WOOD II | DUNDEE, Tuscarawas, OH | Pass | State |
| 2025-09-05 | TRAILWAY WOOD II | DUNDEE, Tuscarawas, OH | Pass | State |
| 2025-09-05 | CALYX ENERGY III LLC / CARVER PAD | DUSTIN, Hughes, OK | Pass | State |
| 2025-09-05 | FORMENTERA OPERATIONS / BETH 13 M1H BETH 24 M1H | HENNESSEY, Kingfisher, OK | Pass | State |
| 2025-09-05 | HEP PENNSYLVANIA GATHERING LLC/WHITE CPF 1 COMP STA | STEVENSVILLE, Bradford, PA | Pass | State |
| 2025-09-05 | REGENCY MARCELLUS GAS GATHERING LLC/TAYLOR COMP STA | CANTON, Bradford, PA | Pass | State |
| 2025-09-05 | EXPAND OPERATING LLC/ROSIEMAR SUS PAD | MESHOPPEN, Susquehanna, PA | Pass | State |
| 2025-09-05 | ARKEMA BEAUMONT PLANT | BEAUMONT, Jefferson, TX | Pass | State |
| 2025-09-05 | NUCOR STEEL | PLYMOUTH, Box Elder, UT | Pass | State |
| 2025-09-05 | WESTROCK VIRGINIA LLC - COVINGTON | COVINGTON, Covington (city), VA | Pass | State |
| 2025-09-05 | GRAYS HARBOR ENERGY LLC | ELMA, Grays Harbor, WA | Pending | Local |
| 2025-09-05 | AMERICAN BITUMINOUS POWER PARTNERS, L. P., GRANT | GRANT TOWN, Marion, WV | Pass | State |
| 2025-09-04 | MOSS MINE | BULLHEAD CITY, Mohave, AZ | Pass | State |
| 2025-09-04 | LA CITY, DWP HARBOR GENERATING STATION | WILMINGTON, Los Angeles, CA | Pass | Local |
| 2025-09-04 | PUBLIC SERVICE CO - HAYDEN PLT | HAYDEN, Routt, CO | Pass | State |
| 2025-09-04 | HARTFORD WATER POLLUTION CONTROL FACILITY — high-priority violation on file | HARTFORD, Hartford, CT | Pass | State |
| 2025-09-04 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | DELAWARE CITY, New Castle, DE | Pass | State |
| 2025-09-04 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | DELAWARE CITY, New Castle, DE | Pass | State |
| 2025-09-04 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | DELAWARE CITY, New Castle, DE | Pass | State |
| 2025-09-04 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | DELAWARE CITY, New Castle, DE | Pass | State |
| 2025-09-04 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | DELAWARE CITY, New Castle, DE | Pass | State |
| 2025-09-04 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | DELAWARE CITY, New Castle, DE | Pass | State |
| 2025-09-04 | MOSAIC FERTILIZER, LLC — high-priority violation on file | BARTOW, Polk, FL | Pass | State |
| 2025-09-04 | PRINTPACK INC. | VILLA RICA, Carroll, GA | Pass | State |
| 2025-09-04 | ATLANTA GAS LIGHT COMPANY - RIVERDALE LNG PLANT — high-priority violation on file | RIVERDALE, Clayton, GA | Pass | State |
| 2025-09-04 | ATLANTA GAS LIGHT COMPANY - RIVERDALE LNG PLANT — high-priority violation on file | RIVERDALE, Clayton, GA | Pass | State |
| 2025-09-04 | STARBUCKS MANUFACTURING CORP. GEORGIA SOLUBLE PLANT (GSP) | AUGUSTA, Richmond, GA | Pass | State |
| 2025-09-04 | STARBUCKS MANUFACTURING CORP. GEORGIA SOLUBLE PLANT (GSP) | AUGUSTA, Richmond, GA | Pass | State |
| 2025-09-04 | STARBUCKS MANUFACTURING CORP. GEORGIA SOLUBLE PLANT (GSP) | AUGUSTA, Richmond, GA | Pass | State |
| 2025-09-04 | MID AMERICAN ENERGY CO-COUNCIL BLUFFS | COUNCIL BLUFFS, Pottawattamie, IA | Pass | State |
| 2025-09-04 | BUNGE NORTH AMERICA INC-COUNCIL BLUFFS | COUNCIL BLUFFS, Pottawattamie, IA | Pass | State |
| 2025-09-04 | MIDAMERICAN ENERGY CO PLEASANT HILL GDMEC | PLEASANT HILL, Polk, IA | Pass | Local |
| 2025-09-04 | KINDER MORGAN LIQUIDS TERMINALS LLC | FOREST VIEW, Cook, IL | Pass | State |
| 2025-09-04 | DUALTECH INCORPORATED — high-priority violation on file | FRANKLIN, Johnson, IN | Pass | State |
| 2025-09-04 | LINDE INC | EAST CHICAGO, Lake, IN | Pass | State |
| 2025-09-04 | SUMMIT SUSTAINABLE INGREDIENTS LLC DBA AMBER WAVE(AIR) | PHILLIPSBURG, Phillips, KS | Pass | State |
| 2025-09-04 | FUTAMURA USA (AIR) — high-priority violation on file | TECUMSEH, Shawnee, KS | Pass | State |
| 2025-09-04 | TEXAS GAS TRANSMISSION LLC - MIDLAND III TRANSMISSION | BREMEN, Muhlenberg, KY | Pass | State |
| 2025-09-04 | ECO MAINE | PORTLAND, Cumberland, ME | Pass | State |
| 2025-09-04 | NAVAL SUPPORT ACTIVITY (NSA) CUTLER | CUTLER, Washington, ME | Pass | State |
| 2025-09-04 | NAVAL SUPPORT ACTIVITY (NSA) CUTLER | CUTLER, Washington, ME | Pass | State |
| 2025-09-04 | DTE ST. CLAIR / BELLE RIVER POWER PLANT — high-priority violation on file | CHINA, St. Clair, MI | Pass | State |
| 2025-09-04 | FCA US LLC STERLING HEIGHTS ASSEMBLY PLANT | STERLING HEIGHTS, Macomb, MI | Pass | State |
| 2025-09-04 | EES COKE BATTERY, LLC — high-priority violation on file | DETROIT, Wayne, MI | Pass | State |
| 2025-09-04 | N. B. WEST CONTRACTING CO INC PACIFIC PLANT | PACIFIC, Franklin, MO | Pass | State |
| 2025-09-04 | DELTA ASPHALT INC | DEXTER, Stoddard, MO | Pass | State |
| 2025-09-04 | TRANSCONTINENTAL GAS PIPE LINE COMPANY LLC, STATION 77 | SEMINARY, Covington, MS | Pass | State |
| 2025-09-04 | TRANSCONTINENTAL GAS PIPE LINE COMPANY LLC, STATION 77 | SEMINARY, Covington, MS | Pass | State |
| 2025-09-04 | TRANSCONTINENTAL GAS PIPE LINE COMPANY LLC, STATION 77 | SEMINARY, Covington, MS | Pass | State |
| 2025-09-04 | TRANSCONTINENTAL GAS PIPE LINE COMPANY LLC, STATION 77 | SEMINARY, Covington, MS | Pass | State |
| 2025-09-04 | PCS PHOSPHATE COMPANY, INC. - AURORA | AURORA, Beaufort, NC | Pass | State |
| 2025-09-04 | S. T. WOOTEN - PEA RIDGE ASPHALT PLANT | NEW HILL, Chatham, NC | Pending | State |
| 2025-09-04 | UNILIN FLOORING, N.V. — high-priority violation on file | MOUNT GILEAD, Montgomery, NC | Pending | State |
| 2025-09-04 | CANAL AG RECYCLING LLC — high-priority violation on file | TURKEY, Sampson, NC | Pending | State |
| 2025-09-04 | TESORO REFINING & MARKETING COMPANY LLC - MARATHON MANDAN REFINERY - AQ | MANDAN, Morton, ND | Pass | State |
| 2025-09-04 | LON D WRIGHT POWER PLANT | FREMONT, Dodge, NE | N/A | State |
| 2025-09-04 | OXY USA INC - CORRAL CS 2S | MALAGA, Eddy, NM | Pass | State |
| 2025-09-04 | OXY USA INC - CORRAL CS 2S | MALAGA, Eddy, NM | Pass | State |
| 2025-09-04 | CORRAL 2N COMPRESSOR | MALAGA, Eddy, NM | Pass | State |
| 2025-09-04 | CORRAL 2N COMPRESSOR | MALAGA, Eddy, NM | Pass | State |
| 2025-09-04 | CORRAL 2N COMPRESSOR | MALAGA, Eddy, NM | Pass | State |
| 2025-09-04 | ROSS DRAW COMPRESSOR STATION | MALAGA, Eddy, NM | Pass | State |
| 2025-09-04 | POSEIDON CTB | JAL, Eddy, NM | Pass | State |
| 2025-09-04 | REVEILLE COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-09-04 | REVEILLE COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-09-04 | RED RAIDER COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2025-09-04 | THISTLE COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-09-04 | HARRIER COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-09-04 | MOCKINGBIRD COMPRESSOR STATION | LOVING, Lea, NM | Pass | State |
| 2025-09-04 | MOCKINGBIRD COMPRESSOR STATION | LOVING, Lea, NM | Pass | State |
| 2025-09-04 | EOG RESOURCES, INC. - HN STO 26 12-11-6 SOUTH PAD | CADIZ, Harrison, OH | Pass | State |
| 2025-09-04 | EOG RESOURCES, INC. - HN STO 26 12-11-6 SOUTH PAD | CADIZ, Harrison, OH | Pass | State |
| 2025-09-04 | EUREKA MIDSTREAM-ZINK COMPRESSOR STATION | CLARINGTON, Monroe, OH | Pass | State |
| 2025-09-04 | EUREKA MIDSTREAM-ZINK COMPRESSOR STATION | CLARINGTON, Monroe, OH | Pass | State |
| 2025-09-04 | EUREKA MIDSTREAM-ZINK COMPRESSOR STATION | CLARINGTON, Monroe, OH | Pass | State |
| 2025-09-04 | EUREKA MIDSTREAM-ZINK COMPRESSOR STATION | CLARINGTON, Monroe, OH | Pass | State |
| 2025-09-04 | EUREKA MIDSTREAM-ZINK COMPRESSOR STATION | CLARINGTON, Monroe, OH | Pass | State |
| 2025-09-04 | EUREKA MIDSTREAM-ZINK COMPRESSOR STATION | CLARINGTON, Monroe, OH | Pass | State |
| 2025-09-04 | EUREKA MIDSTREAM-ZINK COMPRESSOR STATION | CLARINGTON, Monroe, OH | Pass | State |
| 2025-09-04 | EUREKA MIDSTREAM-ZINK COMPRESSOR STATION | CLARINGTON, Monroe, OH | Pass | State |
| 2025-09-04 | EUREKA MIDSTREAM-ZINK COMPRESSOR STATION | CLARINGTON, Monroe, OH | Pass | State |
| 2025-09-04 | EUREKA MIDSTREAM-ZINK COMPRESSOR STATION | CLARINGTON, Monroe, OH | Pass | State |
| 2025-09-04 | EUREKA MIDSTREAM-ZINK COMPRESSOR STATION | CLARINGTON, Monroe, OH | Pass | State |
| 2025-09-04 | EUREKA MIDSTREAM-ZINK COMPRESSOR STATION | CLARINGTON, Monroe, OH | Pass | State |
| 2025-09-04 | BCE MACH III LLC / LSEOU 41 2HO LSEOU 47 2HO LSEOU 47 3 | DOVER, Kingfisher, OK | Pass | State |
| 2025-09-04 | BCE MACH III LLC / LSEOU 41 2HO LSEOU 47 2HO LSEOU 47 3 | DOVER, Kingfisher, OK | Pass | State |
| 2025-09-04 | CALYX ENERGY III LLC / EAGLE PAD | VERNON, Pittsburg, OK | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.