EPA Air · stack tests by year
Air-emissions stack tests in 2026
- 11,110Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
States, 2026
- Ohio 1,474
- Indiana 1,010
- California 979
- Florida 795
- Wyoming 755
- New Mexico 724
- Georgia 509
- Pennsylvania 501
- Arkansas 374
- Alabama 357
- Missouri 326
- Texas 316
- Mississippi 263
- Michigan 207
- North Carolina 188
- Colorado 185
- Iowa 167
- Illinois 165
- South Carolina 135
- Wisconsin 135
- West Virginia 114
- Virginia 98
- Idaho 96
- Montana 91
- Tennessee 84
- Minnesota 84
- Delaware 73
- Kentucky 71
- Arizona 71
- Connecticut 68
- Kansas 63
- Nevada 57
- Massachusetts 54
- North Dakota 52
- Nebraska 51
- Utah 51
- Washington 46
- Alaska 45
- New York 43
- South Dakota 34
- District of Columbia 30
- New Hampshire 29
- Maryland 28
- Oregon 27
- Louisiana 26
- Hawaii 21
- Oklahoma 15
- Rhode Island 13
- Puerto Rico 5
- Maine 5
Other years
Air-emissions stack tests recorded in 2026
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2026-04-17 | HEARTLAND RURAL ELECTRIC - PWWSD13 | MOUND CITY, Linn, KS | Pass | State |
| 2026-04-17 | PANHANDLE EASTERN PIPE LINE - HAVEN STATION (AIR) | HAVEN, Reno, KS | Pass | State |
| 2026-04-17 | ENTEGRIS INC — high-priority violation on file | BEDFORD, TOWN OF, Middlesex, MA | Pending | State |
| 2026-04-17 | GENERAL FORMULATIONS, INC. | SPARTA, Kent, MI | Pass | State |
| 2026-04-17 | EES COKE BATTERY, LLC — high-priority violation on file | DETROIT, Wayne, MI | Pass | State |
| 2026-04-17 | SIMON CAMAMILE SOUTH TB | LA HUERTA, Eddy, NM | Pass | State |
| 2026-04-17 | MALLON 27 FED COM TB | HOBBS, Lea, NM | Pass | State |
| 2026-04-17 | OXY - RED TANK 19 CGL | EUNICE, Lea, NM | Pass | State |
| 2026-04-17 | OXY - RED TANK 19 CGL | EUNICE, Lea, NM | Pass | State |
| 2026-04-17 | GUNNER FED 5 B CTB | JAL, Lea, NM | Pass | State |
| 2026-04-17 | NEW YORK TIMES BUILDING CONDOMINIUM | NEW YORK, New York, NY | Pass | State |
| 2026-04-17 | NFG MIDSTREAM COVINGTON LLC/KRAUSE COMP STA | MAINESBURG, Tioga, PA | Pass | State |
| 2026-04-17 | HILCORP ENERGY CO/LACKAWANNOCK LARMON CTL FAC | MERCER, Mercer, PA | Pending | State |
| 2026-04-16 | KRONOSPAN USA — high-priority violation on file | EASTABOGA, Calhoun, AL | Pass | State |
| 2026-04-16 | KRONOSPAN USA — high-priority violation on file | EASTABOGA, Calhoun, AL | Pass | State |
| 2026-04-16 | BAY GAS STORAGE COMPANY, LLC | MCINTOSH, Washington, AL | Pass | State |
| 2026-04-16 | DESOTO GATHERING COMPANY LLC - PIKE CPF-1 | HATTIEVILLE, Conway, AR | Pass | State |
| 2026-04-16 | AMERICAN KRAFT PAPER INDUSTRIES, LLC. | WHITE HALL, Jefferson, AR | Pass | State |
| 2026-04-16 | DESOTO GATHERING COMPANY, LLC - STEELHEAD CPF-2 | CLINTON, Van Buren, AR | Pass | State |
| 2026-04-16 | BALL METAL BEVERAGE CONTAINER CORPORATION — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2026-04-16 | BALL METAL BEVERAGE CONTAINER CORPORATION — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pending | Local |
| 2026-04-16 | TESORO REFINING & MARKETING CO, LLC — high-priority violation on file | CARSON, Los Angeles, CA | Pass | Local |
| 2026-04-16 | SENTINEL PEAK RESOURCES CA LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2026-04-16 | SENTINEL PEAK RESOURCES CA LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2026-04-16 | SAPUTO CHEESE USA INC | TULARE, Tulare, CA | Pass | Local |
| 2026-04-16 | SAPUTO CHEESE USA INC | TULARE, Tulare, CA | Pass | Local |
| 2026-04-16 | SAPUTO CHEESE USA INC | TULARE, Tulare, CA | Pass | Local |
| 2026-04-16 | SAPUTO CHEESE USA INC | TULARE, Tulare, CA | Pass | Local |
| 2026-04-16 | LARAMIE ENERGY - MVS COMPRESSOR STATION | COLLBRAN 10.8 MI. E OF, Mesa, CO | Pass | State |
| 2026-04-16 | GCC RIO GRANDE - PUEBLO CEMENT PLANT — high-priority violation on file | PUEBLO 4.5 MI. S OF, Pueblo, CO | Pass | State |
| 2026-04-16 | QUIKRETE CONSTRUCTION MATERIALS, LLC | NEWBERRY, Alachua, FL | Pass | State |
| 2026-04-16 | QUIKRETE CONSTRUCTION MATERIALS, LLC | NEWBERRY, Alachua, FL | Pass | State |
| 2026-04-16 | SPECTRA METAL SALES, INC. | CLEARWATER, Pinellas, FL | Pass | State |
| 2026-04-16 | GRAPHIC PACKAGING INTERNATIONAL, LLC - MACON MILL | MACON, Bibb, GA | Pass | State |
| 2026-04-16 | GRAPHIC PACKAGING INTERNATIONAL, LLC - MACON MILL | MACON, Bibb, GA | Pass | State |
| 2026-04-16 | GRAPHIC PACKAGING INTERNATIONAL, LLC - MACON MILL | MACON, Bibb, GA | Pass | State |
| 2026-04-16 | GRAPHIC PACKAGING INTERNATIONAL, LLC - MACON MILL | MACON, Bibb, GA | Pass | State |
| 2026-04-16 | MAS GEORGIA LFG, LLC (PINE RIDGE) | GRIFFIN, Butts, GA | Pass | State |
| 2026-04-16 | MAS GEORGIA LFG, LLC (PINE RIDGE) | GRIFFIN, Butts, GA | Pass | State |
| 2026-04-16 | MAS GEORGIA LFG, LLC (PINE RIDGE) | GRIFFIN, Butts, GA | Pass | State |
| 2026-04-16 | TROJAN BATTERY COMPANY, LLC | LITHONIA, DeKalb, GA | Pass | State |
| 2026-04-16 | TROJAN BATTERY COMPANY, LLC | LITHONIA, DeKalb, GA | Pass | State |
| 2026-04-16 | MATTHEWS C W CONTRACTING CO INC | NORCROSS, Gwinnett, GA | Pass | State |
| 2026-04-16 | GREEN POWER SOLUTIONS OF GEORGIA | DUBLIN, Laurens, GA | Pass | State |
| 2026-04-16 | GREEN POWER SOLUTIONS OF GEORGIA | DUBLIN, Laurens, GA | Pass | State |
| 2026-04-16 | GREEN POWER SOLUTIONS OF GEORGIA | DUBLIN, Laurens, GA | Pass | State |
| 2026-04-16 | GREEN POWER SOLUTIONS OF GEORGIA | DUBLIN, Laurens, GA | Pass | State |
| 2026-04-16 | GREEN POWER SOLUTIONS OF GEORGIA | DUBLIN, Laurens, GA | Pass | State |
| 2026-04-16 | GREEN POWER SOLUTIONS OF GEORGIA | DUBLIN, Laurens, GA | Pass | State |
| 2026-04-16 | GREEN POWER SOLUTIONS OF GEORGIA | DUBLIN, Laurens, GA | Pass | State |
| 2026-04-16 | GREEN POWER SOLUTIONS OF GEORGIA | DUBLIN, Laurens, GA | Pass | State |
| 2026-04-16 | ABSOLUTE ENERGY LLC-SAINT ANSGAR (MONA) | SAINT ANSGAR, Mitchell, IA | Pass | State |
| 2026-04-16 | CLARIOS LLC | GENEVA, Kane, IL | Fail | State |
| 2026-04-16 | CLARIOS LLC | GENEVA, Kane, IL | Pass | State |
| 2026-04-16 | BP PRODUCTS NORTH AMERICA INC WHITING BUSINESS UNIT — high-priority violation on file | WHITING, Lake, IN | Pass | State |
| 2026-04-16 | BP PRODUCTS NORTH AMERICA INC WHITING BUSINESS UNIT — high-priority violation on file | WHITING, Lake, IN | Pass | State |
| 2026-04-16 | BP PRODUCTS NORTH AMERICA INC WHITING BUSINESS UNIT — high-priority violation on file | WHITING, Lake, IN | Pass | State |
| 2026-04-16 | BP PRODUCTS NORTH AMERICA INC WHITING BUSINESS UNIT — high-priority violation on file | WHITING, Lake, IN | Pass | State |
| 2026-04-16 | BP PRODUCTS NORTH AMERICA INC WHITING BUSINESS UNIT — high-priority violation on file | WHITING, Lake, IN | Pass | State |
| 2026-04-16 | BP PRODUCTS NORTH AMERICA INC WHITING BUSINESS UNIT — high-priority violation on file | WHITING, Lake, IN | Fail | State |
| 2026-04-16 | HOWMET CASTINGS AND SERVICES INCORPORATED | LA PORTE, LaPorte, IN | Pass | State |
| 2026-04-16 | HOWMET CASTINGS AND SERVICES INCORPORATED | LA PORTE, LaPorte, IN | Pass | State |
| 2026-04-16 | HOWMET CASTINGS AND SERVICES INCORPORATED | LA PORTE, LaPorte, IN | Pass | State |
| 2026-04-16 | HOWMET CASTINGS AND SERVICES INCORPORATED | LA PORTE, LaPorte, IN | Pass | State |
| 2026-04-16 | HOWMET CASTINGS AND SERVICES INCORPORATED | LA PORTE, LaPorte, IN | Pass | State |
| 2026-04-16 | VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT | BLUFFTON, Wells, IN | Pass | State |
| 2026-04-16 | VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT | BLUFFTON, Wells, IN | Pass | State |
| 2026-04-16 | ONEOK HYDROCARBON - BUSHTON COMPLEX (FRACTIONATOR) (AIR) | BUSHTON, Ellsworth, KS | Pass | State |
| 2026-04-16 | AMRIZE — high-priority violation on file | HAGERSTOWN, Washington, MD | Pass | State |
| 2026-04-16 | HEARTLAND CORN PRODUCTS | WINTHROP, Sibley, MN | Pass | State |
| 2026-04-16 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2026-04-16 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2026-04-16 | PCS PHOSPHATE COMPANY, INC. - AURORA | AURORA, Beaufort, NC | Pass | State |
| 2026-04-16 | PCS PHOSPHATE COMPANY, INC. - AURORA | AURORA, Beaufort, NC | Pass | State |
| 2026-04-16 | CROWN EQUIPMENT CORPORATION-KINSTON | KINSTON, Lenoir, NC | Pending | State |
| 2026-04-16 | WHEELABRATOR CONCORD COMPANY, L.P. | CONCORD, Merrimack, NH | Pass | State |
| 2026-04-16 | BLOSSOM COMPRESSOR STATION | CARLSBAD, Eddy, NM | Pass | State |
| 2026-04-16 | ENTERPRISE - DEVON RATTLESNAKE COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2026-04-16 | GUNNER FED 5 B CTB | JAL, Lea, NM | Pass | State |
| 2026-04-16 | GUNNER FED 5 B CTB | JAL, Lea, NM | Pass | State |
| 2026-04-16 | LANCASTER CNTY SWMA/SUSQ RESOURCE MGMT COMPLEX — high-priority violation on file | HARRISBURG, Dauphin, PA | Pass | State |
| 2026-04-16 | REGENCY MARCELLUS GATHERING LLC/BRADFORD WEST COMP STA | GRANVILLE SUMMIT, Bradford, PA | Pass | State |
| 2026-04-16 | NFG MIDSTREAM COVINGTON LLC/DCNR TRACT 595 | ARNOT, Tioga, PA | Pass | State |
| 2026-04-16 | EQM GATHERING OPCO LLC/TERRA COMP STA | PLUM CREEK, Armstrong, PA | Pass | State |
| 2026-04-16 | MARKWEST LIBERTY MIDST & RES/IMPERIAL CIBUS RANCH COMP STA | ROBINSON, Washington, PA | Pass | State |
| 2026-04-16 | WOLF RUN ENERGY LLC/ELECTRIC GENERATION STATION | WYALUSING, Bradford, PA | Pass | State |
| 2026-04-16 | RAG APPLE LLC PAD 1 — high-priority violation on file | MONTROSE, Susquehanna, PA | Pass | State |
| 2026-04-16 | JHHC PAD 1 — high-priority violation on file | MONTROSE, Susquehanna, PA | Pass | State |
| 2026-04-16 | CENTURY ALUMINUM OF SOUTH CAROLINA INC — high-priority violation on file | GOOSE CREEK, Berkeley, SC | Pending | State |
| 2026-04-16 | QUIKRETE CONSTRUCTION MATERIALS, LLC — high-priority violation on file | HARLEYVILLE, Dorchester, SC | Pending | State |
| 2026-04-16 | PETE LIEN & SONS, INC. MAIN PLANT | RAPID CITY, Pennington, SD | Pass | State |
| 2026-04-16 | DOMINION - LADYSMITH CT STATION | WOODFORD, Caroline, VA | Pass | State |
| 2026-04-16 | WASTE MANAGEMENT OF WISCONSIN, INC. - PHEASANT RUN RECYCLING AND DISPOSAL FACILI | BRISTOL, Kenosha, WI | Pass | State |
| 2026-04-16 | DOUGLAS GAS PLANT (TALLGRASS MIDSTREAM) | DOUGLAS, Converse, WY | Pass | State |
| 2026-04-16 | DOUGLAS GAS PLANT (TALLGRASS MIDSTREAM) | DOUGLAS, Converse, WY | Pass | State |
| 2026-04-16 | DOUGLAS GAS PLANT (TALLGRASS MIDSTREAM) | DOUGLAS, Converse, WY | Pass | State |
| 2026-04-16 | DOUGLAS GAS PLANT (TALLGRASS MIDSTREAM) | DOUGLAS, Converse, WY | Pass | State |
| 2026-04-16 | DOUGLAS GAS PLANT (TALLGRASS MIDSTREAM) | DOUGLAS, Converse, WY | Pass | State |
| 2026-04-16 | DOUGLAS GAS PLANT (TALLGRASS MIDSTREAM) | DOUGLAS, Converse, WY | Pass | State |
| 2026-04-16 | DOUGLAS GAS PLANT (TALLGRASS MIDSTREAM) | DOUGLAS, Converse, WY | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.