EPA Air · stack tests by year
Air-emissions stack tests in 2021
- 35,950Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
States, 2021
- California 17,676
- Ohio 2,582
- Florida 1,540
- Indiana 1,495
- Oklahoma 1,318
- Georgia 1,189
- New Mexico 841
- Pennsylvania 788
- Alabama 621
- Mississippi 589
- Texas 574
- Arkansas 518
- Missouri 515
- Colorado 407
- Iowa 368
- Washington 334
- North Carolina 273
- Michigan 256
- Wisconsin 239
- Wyoming 235
- West Virginia 225
- Kentucky 222
- Delaware 222
- Montana 220
- South Carolina 217
- Minnesota 209
- Kansas 177
- Alaska 143
- Illinois 142
- Utah 140
- Nevada 136
- Virginia 131
- Nebraska 117
- Maine 110
- New Jersey 110
- New York 103
- Connecticut 99
- Tennessee 98
- North Dakota 93
- Arizona 93
- Idaho 90
- Louisiana 69
- Hawaii 64
- Maryland 56
- South Dakota 55
- District of Columbia 54
- New Hampshire 53
- Oregon 45
- Rhode Island 34
- Massachusetts 29
- Puerto Rico 19
- Vermont 17
Other years
Air-emissions stack tests recorded in 2021
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2021-11-16 | CNX MIDSTREAM OPERATING COMPANY LLC, SHIRLEY STATION | ALMA, Tyler, WV | Pass | State |
| 2021-11-16 | COLUMBIA GAS TRANSMISSION, LLC, KENOVA | KENOVA, Wayne, WV | Pass | State |
| 2021-11-16 | HF SINCLAIR PARCO REFINING LLC — high-priority violation on file | SINCLAIR, Carbon, WY | Pass | State |
| 2021-11-16 | PINEDALE COMPLEX (HARVEST MIDSTREAM COMPANY) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2021-11-16 | EAST PAINTER FACILITY (NORTH SHORE EXPLORATION & PRODUCTION) | UINTA COUNTY, Uinta, WY | Pass | State |
| 2021-11-15 | SOUTHERN NATURAL GAS | ANNISTON, Calhoun, AL | Pass | State |
| 2021-11-15 | GULFSTREAM NATURAL GAS SYSTEM LLC | CODEN, Mobile, AL | Pass | State |
| 2021-11-15 | GULFSTREAM NATURAL GAS SYSTEM LLC | CODEN, Mobile, AL | Pass | State |
| 2021-11-15 | GULFSTREAM NATURAL GAS SYSTEM LLC | CODEN, Mobile, AL | Pass | State |
| 2021-11-15 | NAWS - CHINA LAKE | CALIFORNIA, Undetermined, CA | Pass | Local |
| 2021-11-15 | PQ CORPORATION | SOUTH GATE, Los Angeles, CA | Pass | Local |
| 2021-11-15 | MORTON SALT, INC. | CAPE CANAVERAL, Brevard, FL | Pass | State |
| 2021-11-15 | MORTON SALT, INC. | CAPE CANAVERAL, Brevard, FL | Pass | State |
| 2021-11-15 | CLARIOS, LLC | TAMPA, Hillsborough, FL | Pass | State |
| 2021-11-15 | CLARIOS, LLC | TAMPA, Hillsborough, FL | Pass | State |
| 2021-11-15 | CLARIOS, LLC | TAMPA, Hillsborough, FL | Pass | State |
| 2021-11-15 | CLARIOS, LLC | TAMPA, Hillsborough, FL | Pass | State |
| 2021-11-15 | OLDCASTLE APG SOUTH, INC. — high-priority violation on file | AUBURNDALE, Polk, FL | Pass | State |
| 2021-11-15 | DALTON CORPORATION WARSAW MANUFACTURING FACILITY — high-priority violation on file | WARSAW, Kosciusko, IN | Pass | State |
| 2021-11-15 | DALTON CORPORATION WARSAW MANUFACTURING FACILITY — high-priority violation on file | WARSAW, Kosciusko, IN | Pass | State |
| 2021-11-15 | DALTON CORPORATION WARSAW MANUFACTURING FACILITY — high-priority violation on file | WARSAW, Kosciusko, IN | Pass | State |
| 2021-11-15 | SIGECO - FB CULLEY GENERATING STATION | NEWBURGH, Warrick, IN | Pass | State |
| 2021-11-15 | STEEL DYNAMICS, INC. STRUCTURAL & RAIL DIVISION — high-priority violation on file | COLUMBIA CITY, Whitley, IN | Pass | State |
| 2021-11-15 | US ARMY GARRISON FORT KNOX | FORT KNOX, Hardin, KY | Pass | State |
| 2021-11-15 | AMERESCO CHICOPEE ENERGY, INC | CHICOPEE, TOWN OF, Hampden, MA | Pass | State |
| 2021-11-15 | MAGNUM COMPRESSOR STATION — high-priority violation on file | CARLSBAD, Eddy, NM | Pass | State |
| 2021-11-15 | SPARTAN COMPRESSOR STATION | MALAGA, Eddy, NM | Pass | State |
| 2021-11-15 | SPARTAN COMPRESSOR STATION | MALAGA, Eddy, NM | Pass | State |
| 2021-11-15 | SAND DUNES NORTH CORRIDOR WEST COMPRESSION STATION | MALAGA, Eddy, NM | Pass | State |
| 2021-11-15 | EUNICE GAS PROCESSING PLANT — high-priority violation on file | EUNICE, Lea, NM | Pass | State |
| 2021-11-15 | EUNICE GAS PROCESSING PLANT — high-priority violation on file | EUNICE, Lea, NM | Pass | State |
| 2021-11-15 | EUNICE GAS PROCESSING PLANT — high-priority violation on file | EUNICE, Lea, NM | Pass | State |
| 2021-11-15 | EOG RESOURCES, INC. - HOCHSTETLER 7-11-5 PAD | JEWETT, Harrison, OH | Pass | State |
| 2021-11-15 | EOG RESOURCES, INC. - HOCHSTETLER 7-11-5 PAD | JEWETT, Harrison, OH | Pass | State |
| 2021-11-15 | ET GATHERING PROCESSING LLC / HYDRO COMPRESSOR STATION | HYDRO, Blaine, OK | Pass | State |
| 2021-11-15 | ET GATHERING PROCESSING LLC / HYDRO COMPRESSOR STATION | HYDRO, Blaine, OK | Pass | State |
| 2021-11-15 | ET GATHERING PROCESSING LLC / HYDRO COMPRESSOR STATION | HYDRO, Blaine, OK | Pass | State |
| 2021-11-15 | ET GATHERING PROCESSING LLC / HYDRO COMPRESSOR STATION | HYDRO, Blaine, OK | Pass | State |
| 2021-11-15 | XTO ENERGY INC / WASHITA COMPRESSOR STATION | ARDMORE, Carter, OK | Pass | State |
| 2021-11-15 | TARGA PIPELINE MIDCONTINENT LLC / MATHEWS COMPRESSOR STATION | WILSON, Carter, OK | Pass | State |
| 2021-11-15 | DCP OPERATING CO LP / WILD HOG BOOSTER STATION | BRADLEY, Grady, OK | Pass | State |
| 2021-11-15 | DCP OPERATING CO LP / WILD HOG BOOSTER STATION | BRADLEY, Grady, OK | Pass | State |
| 2021-11-15 | EQM GATHERING OPCO LLC/PETTIT COMP STA | HOLBROOK, Greene, PA | Pass | State |
| 2021-11-15 | CHEMDESIGN PRODUCTS, INC. | MARINETTE, Marinette, WI | Pass | State |
| 2021-11-15 | MADISON GAS AND ELECTRIC COMPANY - WEST MARINETTE FACILITY — high-priority violation on file | PESHTIGO, Marinette, WI | Pass | State |
| 2021-11-15 | HILIGHT GAS PLANT (WES POWDER RIVER HOLDINGS LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2021-11-14 | HILCORP ALASKA, LLC / GATHERING CENTER #2 (GC 2) | NORTH SLOPE BOROUGH, North Slope, AK | Pass | State |
| 2021-11-14 | BRUNSWICK CELLULOSE LLC | BRUNSWICK, Glynn, GA | Pass | State |
| 2021-11-14 | BRUNSWICK CELLULOSE LLC | BRUNSWICK, Glynn, GA | Pass | State |
| 2021-11-13 | HILCORP ALASKA, LLC / GATHERING CENTER #2 (GC 2) | NORTH SLOPE BOROUGH, North Slope, AK | Pass | State |
| 2021-11-13 | FLORIDA POWER & LIGHT COMPANY | PENSACOLA, Escambia, FL | Pass | State |
| 2021-11-13 | BRUNSWICK CELLULOSE LLC | BRUNSWICK, Glynn, GA | Pass | State |
| 2021-11-13 | CERTAINTEED LLC (AIR) — high-priority violation on file | KANSAS CITY, Wyandotte, KS | Pass | State |
| 2021-11-12 | BOISE WHITE PAPER LLC | JACKSON, Clarke, AL | Pass | State |
| 2021-11-12 | RAZORBACK GATHERING COMPANY, LLC. - HARMONY CPF 1 | SEARCY, White, AR | Pass | State |
| 2021-11-12 | RAZORBACK GATHERING COMPANY, LLC. - HARMONY CPF 1 | SEARCY, White, AR | Pass | State |
| 2021-11-12 | EL SEGUNDO ENERGY CENTER LLC | EL SEGUNDO, Los Angeles, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
| 2021-11-12 | VITRO FLAT GLASS LLC — high-priority violation on file | FRESNO, Fresno, CA | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.