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 |
|---|---|---|---|---|
| 2021-10-31 | FRITO-LAY NORTH AMERICA, INC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-31 | FRITO-LAY NORTH AMERICA, INC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-31 | FRITO-LAY NORTH AMERICA, INC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-31 | FRITO-LAY NORTH AMERICA, INC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-31 | FRITO-LAY NORTH AMERICA, INC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-31 | FRITO-LAY NORTH AMERICA, INC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-31 | SUNCOR ENERGY - DENVER REFINERY — high-priority violation on file | COMMERCE CITY, Adams, CO | Pass | State |
| 2021-10-31 | CRRM REFINERY (AIR) | COFFEYVILLE, Montgomery, KS | Pass | State |
| 2021-10-31 | FRAMATOME NP | RICHLAND, Benton, WA | Pass | Local |
| 2021-10-30 | FLORIDA POWER & LIGHT COMPANY | PENSACOLA, Escambia, FL | Pass | State |
| 2021-10-29 | CITY OF HOPE MEDICAL CENTER | DUARTE, Los Angeles, CA | Pass | Local |
| 2021-10-29 | CITY OF HOPE MEDICAL CENTER | DUARTE, Los Angeles, CA | Pass | Local |
| 2021-10-29 | FRITO LAY INC | RANCHO CUCAMONGA, San Bernardino, CA | Pass | Local |
| 2021-10-29 | ELK CORPORATION OF TEXAS | SHAFTER, Kern, CA | Pass | Local |
| 2021-10-29 | ELK CORPORATION OF TEXAS | SHAFTER, Kern, CA | Pass | Local |
| 2021-10-29 | ELK CORPORATION OF TEXAS | SHAFTER, Kern, CA | Pass | Local |
| 2021-10-29 | ELK CORPORATION OF TEXAS | SHAFTER, Kern, CA | Pass | Local |
| 2021-10-29 | ELK CORPORATION OF TEXAS | SHAFTER, Kern, CA | Pass | Local |
| 2021-10-29 | ELK CORPORATION OF TEXAS | SHAFTER, Kern, CA | Pass | Local |
| 2021-10-29 | WES DJ GATHERING - FREDERICK CS — high-priority violation on file | DACONO AREA, Weld, CO | Pass | State |
| 2021-10-29 | MPLX TERMINALS LLC | FORT LAUDERDALE, Broward, FL | Pass | State |
| 2021-10-29 | ARMSTRONG WORLD INDUSTRIES, INC. | PENSACOLA, Escambia, FL | Pass | State |
| 2021-10-29 | ARMSTRONG WORLD INDUSTRIES, INC. | PENSACOLA, Escambia, FL | Pass | State |
| 2021-10-29 | BP PRODUCTS NORTH AMERICA INC WHITING BUSINESS UNIT — high-priority violation on file | WHITING, Lake, IN | Pass | State |
| 2021-10-29 | BONANZA BIOENERGY (AIR) | GARDEN CITY, Finney, KS | Pass | State |
| 2021-10-29 | COVERT GENERATING STATION — high-priority violation on file | COVERT, Van Buren, MI | Pass | State |
| 2021-10-29 | MISSISSIPPI LIME COMPANY | SAINTE GENEVIEVE, Ste. Genevieve, MO | Pending | State |
| 2021-10-29 | MISSISSIPPI LIME COMPANY | SAINTE GENEVIEVE, Ste. Genevieve, MO | Pending | State |
| 2021-10-29 | INGENCO WHOLESALE POWER, LLC - NEW BERN | NEW BERN, Craven, NC | Pass | State |
| 2021-10-29 | DEPARTMENT OF PUBLIC UTILITIES, CITY OF ORRVILLE, OHIO | ORRVILLE, Wayne, OH | Pass | State |
| 2021-10-29 | LONE STAR IND INC DBA BUZZI UNICEM USA / PRYOR CEMENT FACILITY | PRYOR, Mayes, OK | Pass | State |
| 2021-10-29 | GULFPORT MIDCON LLC / ORIN 2 9H | BRAY, Stephens, OK | Pass | State |
| 2021-10-29 | RHODE ISLAND STATE ENERGY CENTER, LP (FKA ENTERGY RI STATE ENERGY, LP) | JOHNSTON, TOWN OF, Providence, RI | Pass | State |
| 2021-10-29 | RESONAC GRAPHITE AMERICA INC — high-priority violation on file | RIDGEVILLE, Dorchester, SC | Pass | State |
| 2021-10-29 | NEW-INDY CATAWBA LLC | CATAWBA, York, SC | Pass | State |
| 2021-10-29 | CALAVERAS PLANT SITE | SAN ANTONIO, Bexar, TX | Pass | State |
| 2021-10-29 | WEST KARNES CENTRAL FACILITY | KARNES CITY, Karnes, TX | Pass | State |
| 2021-10-29 | WEST KARNES CENTRAL FACILITY | KARNES CITY, Karnes, TX | Pass | State |
| 2021-10-29 | WEST KARNES CENTRAL FACILITY | KARNES CITY, Karnes, TX | Pass | State |
| 2021-10-29 | WEST KARNES CENTRAL FACILITY | KARNES CITY, Karnes, TX | Pass | State |
| 2021-10-29 | WEST KARNES CENTRAL FACILITY | KARNES CITY, Karnes, TX | Pass | State |
| 2021-10-29 | WEST KARNES CENTRAL FACILITY | KARNES CITY, Karnes, TX | Pass | State |
| 2021-10-29 | WEST KARNES CENTRAL FACILITY | KARNES CITY, Karnes, TX | Pass | State |
| 2021-10-29 | WEST KARNES CENTRAL FACILITY | KARNES CITY, Karnes, TX | Pass | State |
| 2021-10-29 | WEST KARNES CENTRAL FACILITY | KARNES CITY, Karnes, TX | Pass | State |
| 2021-10-29 | CAPITAL POWER CORPORATION | TACOMA, Pierce, WA | Pass | Local |
| 2021-10-29 | UNITED GRAIN CORPORATION — high-priority violation on file | VANCOUVER, Clark, WA | Pass | Local |
| 2021-10-29 | CHEYENNE RENEWABLE DIESEL COMPANY (CHEYENNE RENEWABLE DIESEL COMPANY LLC) | CHEYENNE, Laramie, WY | Pass | State |
| 2021-10-29 | SHERIDAN MEDICAL CENTER (DEPARTMENT OF VETERANS AFFAIRS) | SHERIDAN, Sheridan, WY | Pass | State |
| 2021-10-28 | WEXPRO ISLAND COMPRESSOR (FRMLY MPLX) | VERNAL, Uintah, UT | Pass | U.S. EPA |
| 2021-10-28 | WEST FRASER HUGULEY | HUGULEY, Chambers, AL | Pass | State |
| 2021-10-28 | SOUTHERN NATURAL GAS | ELMORE, Elmore, AL | Pass | State |
| 2021-10-28 | CEMEX SOUTHEAST LLC | DEMOPOLIS, Marengo, AL | Pass | State |
| 2021-10-28 | HILCORP ENERGY COMPANY | CREOLA, Mobile, AL | Pass | State |
| 2021-10-28 | HILCORP ENERGY COMPANY | CREOLA, Mobile, AL | Pass | State |
| 2021-10-28 | UCD MEDICAL CENTER | SACRAMENTO, Sacramento, CA | Pass | Local |
| 2021-10-28 | LA CITY DWP- VALLEY GENERATING STN | SUN VALLEY, Los Angeles, CA | Pass | Local |
| 2021-10-28 | LA CITY DWP- VALLEY GENERATING STN | SUN VALLEY, Los Angeles, CA | Pass | Local |
| 2021-10-28 | CITY OF HOPE MEDICAL CENTER | DUARTE, Los Angeles, CA | Pass | Local |
| 2021-10-28 | CALIFORNIA STEEL INDUSTRIES INC — high-priority violation on file | FONTANA, San Bernardino, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-28 | CHEVRON USA PRODUCTS INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-10-28 | CHEVRON USA PRODUCTS INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-10-28 | CHEVRON USA PRODUCTS INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-10-28 | CHEVRON USA PRODUCTS INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-10-28 | CHEVRON USA PRODUCTS INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-10-28 | CHEVRON USA PRODUCTS INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-10-28 | CHEVRON USA PRODUCTS INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-10-28 | CHEVRON USA PRODUCTS INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-10-28 | CHEVRON USA PRODUCTS INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-10-28 | CHEVRON USA PRODUCTS INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-10-28 | CHEVRON USA PRODUCTS INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-10-28 | CHEVRON USA PRODUCTS INC | TRACY, San Joaquin, CA | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.