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 |
|---|---|---|---|---|
| 2021-10-08 | EVERGY - EMPORIA (AIR) | EMPORIA, Lyon, KS | Pass | State |
| 2021-10-08 | NOVA CHEMICALS OLEFINS LLC - GEISMAR ETHYLENE PLANT | GEISMAR, Ascension, LA | Pass | State |
| 2021-10-08 | COREWELL HEALTH - BUTTERWORTH CAMPUS | GRAND RAPIDS, Kent, MI | Pass | State |
| 2021-10-08 | EP ENGINEERED CLAYS CORPORATION — high-priority violation on file | JACKSON, Hinds, MS | Pass | State |
| 2021-10-08 | ROCKY MOUNTAIN POWER | HARDIN, Big Horn, MT | Pass | State |
| 2021-10-08 | ROCKY MOUNTAIN POWER | HARDIN, Big Horn, MT | Pass | State |
| 2021-10-08 | ROCKY MOUNTAIN POWER | HARDIN, Big Horn, MT | Pass | State |
| 2021-10-08 | PHILLIPS 66 (BAYWAY REF/CONOCO) — high-priority violation on file | LINDEN, Union, NJ | Pass | State |
| 2021-10-08 | CHARLES LING EAST FED TANK BATTERY | JAL, Lea, NM | Pass | State |
| 2021-10-08 | GOLDSTRIKE MINE | CARLIN, Eureka, NV | Pass | State |
| 2021-10-08 | WEIDMANN ELECTRICAL TECHNOLOGY, INC. | URBANA, Champaign, OH | Pass | State |
| 2021-10-08 | WEIDMANN ELECTRICAL TECHNOLOGY, INC. | URBANA, Champaign, OH | Pass | State |
| 2021-10-08 | CLEVELAND-CLIFFS CLEVELAND WORKS LLC — high-priority violation on file | CLEVELAND, Cuyahoga, OH | Pass | State |
| 2021-10-08 | CLEVELAND-CLIFFS CLEVELAND WORKS LLC — high-priority violation on file | CLEVELAND, Cuyahoga, OH | Pass | State |
| 2021-10-08 | CLEVELAND-CLIFFS CLEVELAND WORKS LLC — high-priority violation on file | CLEVELAND, Cuyahoga, OH | Pass | State |
| 2021-10-08 | CLEVELAND-CLIFFS CLEVELAND WORKS LLC — high-priority violation on file | CLEVELAND, Cuyahoga, OH | Pass | State |
| 2021-10-08 | ONEOK FIELD SERVICES CO LLC / REDTAIL COMPRESSOR STATION | LINDSAY, Garvin, OK | Pass | State |
| 2021-10-08 | ONEOK FIELD SERVICES CO LLC / REDTAIL COMPRESSOR STATION | LINDSAY, Garvin, OK | Pass | State |
| 2021-10-08 | NORTHUMBERLAND TERM DE LLC/NORTHUMBERLAND TERM | NORTHUMBERLAND, Northumberland, PA | Pass | State |
| 2021-10-08 | RAUSCH CREEK GENERATION LLC/FRAILEY TWP — high-priority violation on file | TREMONT, Schuylkill, PA | Pass | State |
| 2021-10-08 | COLUMBIA GAS TRANS CORP/CGT DELMONT COMP STA | DELMONT, Westmoreland, PA | Pass | State |
| 2021-10-08 | MARKWEST LIBERTY BLUESTONE LLC/SARSEN GAS PROC PLT | EVANS CITY, Butler, PA | Pass | State |
| 2021-10-08 | MARKWEST LIBERTY BLUESTONE LLC/SARSEN GAS PROC PLT | EVANS CITY, Butler, PA | Pass | State |
| 2021-10-08 | XTO ENERGY HOMER CITY PP COMP STA/INDIANA — high-priority violation on file | HOMER CITY, Indiana, PA | Pass | State |
| 2021-10-08 | APPALACHIA MIDSTREAM SVC LLC/CHERRY COMP STA | DUSHORE, Sullivan, PA | Pass | State |
| 2021-10-08 | MTN GATHERING LLC/JEFFERSON COMP STA | BUTLER, Butler, PA | Pass | State |
| 2021-10-08 | U.S. SILICA COMPANY, LLC - COLUMBIA PLANT | WEST COLUMBIA, Lexington, SC | Pass | State |
| 2021-10-08 | AMAZON DATA SERVICES, INC. | STERLING, Loudoun, VA | Pass | State |
| 2021-10-08 | MICRON TECHNOLOGY, INC. | MANASSAS, Manassas (city), VA | Pass | State |
| 2021-10-08 | AVISTA - NECT | SPOKANE, Spokane, WA | Fail | Local |
| 2021-10-08 | CASPER COMPRESSOR STATION (TALLGRASS INTERSTATE GAS TRANSMISSION) | NATRONA COUNTY, Natrona, WY | Pass | State |
| 2021-10-08 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2021-10-07 | CRESTWOOD CORPORATION | DOTHAN, Houston, AL | Pass | State |
| 2021-10-07 | DESOTO GATHERING COMPANY, LLC - STEELHEAD CPF-3 | CLINTON, Van Buren, AR | Pass | State |
| 2021-10-07 | DESOTO GATHERING COMPANY, LLC - STEELHEAD CPF-3 | CLINTON, Van Buren, AR | Pass | State |
| 2021-10-07 | CHEVRON USA | SACRAMENTO, Sacramento, CA | Pass | Local |
| 2021-10-07 | CMC STEEL US, LLC | JACKSONVILLE, Duval, FL | Pass | State |
| 2021-10-07 | CMC STEEL US, LLC | JACKSONVILLE, Duval, FL | Pass | State |
| 2021-10-07 | CMC STEEL US, LLC | JACKSONVILLE, Duval, FL | Pass | State |
| 2021-10-07 | ASCEND PERFORMANCE MATERIALS OPERATIONS — high-priority violation on file | CANTONMENT, Escambia, FL | Pass | State |
| 2021-10-07 | CITY OF TAMPA | TAMPA, Hillsborough, FL | Pass | State |
| 2021-10-07 | CITY OF TAMPA | TAMPA, Hillsborough, FL | Pass | State |
| 2021-10-07 | CITY OF TAMPA | TAMPA, Hillsborough, FL | Pass | State |
| 2021-10-07 | CITY OF TAMPA | TAMPA, Hillsborough, FL | Pass | State |
| 2021-10-07 | CITY OF TAMPA | TAMPA, Hillsborough, FL | Pass | State |
| 2021-10-07 | CITY OF TAMPA | TAMPA, Hillsborough, FL | Pass | State |
| 2021-10-07 | CITY OF TAMPA | TAMPA, Hillsborough, FL | Pass | State |
| 2021-10-07 | INTERNATIONAL PAPER COMPANY - ROME MILL | ROME, Floyd, GA | Pass | State |
| 2021-10-07 | INTERNATIONAL PAPER COMPANY - ROME MILL | ROME, Floyd, GA | Pass | State |
| 2021-10-07 | INTERNATIONAL PAPER COMPANY - ROME MILL | ROME, Floyd, GA | Pass | State |
| 2021-10-07 | INTERNATIONAL PAPER COMPANY - ROME MILL | ROME, Floyd, GA | Pass | State |
| 2021-10-07 | INTERNATIONAL PAPER COMPANY - ROME MILL | ROME, Floyd, GA | Pass | State |
| 2021-10-07 | SK BATTERY AMERICA, INC. | COMMERCE, Jackson, GA | Pass | State |
| 2021-10-07 | SK BATTERY AMERICA, INC. | COMMERCE, Jackson, GA | Pass | State |
| 2021-10-07 | LINCOLNWAY ENERGY LLC | NEVADA, Story, IA | Pass | State |
| 2021-10-07 | TRINITYRAIL MAINTENANCE SERVICES | SHELL ROCK, Butler, IA | Pass | State |
| 2021-10-07 | IDAHO FOREST GROUP LLC - MOYIE SPRINGS | MOYIE SPRINGS, Boundary, ID | Pass | State |
| 2021-10-07 | SNAKE RIVER OIL AND GAS LLC - LITTLE WILLOW ROAD GATHERING FACILITY | NEW PLYMOUTH, Payette, ID | Pass | State |
| 2021-10-07 | CHEM PROCESSING INC | ROCKFORD, Winnebago, IL | Pass | State |
| 2021-10-07 | LINEL A DIVISION OF MESTEK INC | MOORESVILLE, Morgan, IN | Pass | State |
| 2021-10-07 | CALCAR QUARRY | PAOLI, Orange, IN | Pass | State |
| 2021-10-07 | CALCAR QUARRY | PAOLI, Orange, IN | Pass | State |
| 2021-10-07 | CALCAR QUARRY | PAOLI, Orange, IN | Pass | State |
| 2021-10-07 | CALCAR QUARRY | PAOLI, Orange, IN | Pass | State |
| 2021-10-07 | ELLINWOOD MUN POWER PLANT (AIR) | ELLINWOOD, Barton, KS | Pass | State |
| 2021-10-07 | CENTURY ALUMINUM OF KY LLC | HAWESVILLE, Hancock, KY | Fail | State |
| 2021-10-07 | LOGAN ALUMINUM INC | RUSSELLVILLE, Logan, KY | Pass | State |
| 2021-10-07 | FCA US LLC - DETROIT ASSEMBLY COMPLEX — high-priority violation on file | DETROIT, Wayne, MI | Pending | State |
| 2021-10-07 | NAHAN PRINTING INC. | SAINT CLOUD, Stearns, MN | Pass | State |
| 2021-10-07 | ENERSYS ENERGY PRODUCTS INC - SPRINGFIELD 2 | SPRINGFIELD, Greene, MO | Fail | State |
| 2021-10-07 | ENERSYS ENERGY PRODUCTS INC - SPRINGFIELD 2 | SPRINGFIELD, Greene, MO | Pending | State |
| 2021-10-07 | ENERSYS ENERGY PRODUCTS INC - SPRINGFIELD 2 | SPRINGFIELD, Greene, MO | Pending | State |
| 2021-10-07 | ENERSYS ENERGY PRODUCTS INC - SPRINGFIELD 2 | SPRINGFIELD, Greene, MO | Pending | State |
| 2021-10-07 | ENERSYS ENERGY PRODUCTS INC - SPRINGFIELD 2 | SPRINGFIELD, Greene, MO | Pass | State |
| 2021-10-07 | ENERSYS ENERGY PRODUCTS INC - SPRINGFIELD 2 | SPRINGFIELD, Greene, MO | Fail | State |
| 2021-10-07 | ENERSYS ENERGY PRODUCTS INC - SPRINGFIELD 2 | SPRINGFIELD, Greene, MO | Pass | State |
| 2021-10-07 | ENERSYS ENERGY PRODUCTS INC - SPRINGFIELD 2 | SPRINGFIELD, Greene, MO | Fail | State |
| 2021-10-07 | ENERSYS ENERGY PRODUCTS INC - SPRINGFIELD 2 | SPRINGFIELD, Greene, MO | Pass | State |
| 2021-10-07 | ENERSYS ENERGY PRODUCTS INC - SPRINGFIELD 2 | SPRINGFIELD, Greene, MO | Pass | State |
| 2021-10-07 | ENERSYS ENERGY PRODUCTS INC - SPRINGFIELD 2 | SPRINGFIELD, Greene, MO | Pass | State |
| 2021-10-07 | ENERSYS ENERGY PRODUCTS INC - SPRINGFIELD 2 | SPRINGFIELD, Greene, MO | Pass | State |
| 2021-10-07 | ENERSYS ENERGY PRODUCTS INC - SPRINGFIELD 2 | SPRINGFIELD, Greene, MO | Pass | State |
| 2021-10-07 | ENERSYS ENERGY PRODUCTS INC - SPRINGFIELD 2 | SPRINGFIELD, Greene, MO | Pass | State |
| 2021-10-07 | EP ENGINEERED CLAYS CORPORATION — high-priority violation on file | JACKSON, Hinds, MS | Pass | State |
| 2021-10-07 | EP ENGINEERED CLAYS CORPORATION — high-priority violation on file | JACKSON, Hinds, MS | Pass | State |
| 2021-10-07 | EP ENGINEERED CLAYS CORPORATION — high-priority violation on file | JACKSON, Hinds, MS | Pass | State |
| 2021-10-07 | DENBURY ONSHORE LLC, EAST HEIDELBERG MEMBRANE SITE | HEIDELBERG, Jasper, MS | Pass | State |
| 2021-10-07 | DENBURY ONSHORE LLC, EAST HEIDELBERG MEMBRANE SITE | HEIDELBERG, Jasper, MS | Pass | State |
| 2021-10-07 | DENBURY ONSHORE LLC, EAST HEIDELBERG MEMBRANE SITE | HEIDELBERG, Jasper, MS | Pass | State |
| 2021-10-07 | CALEDONIA ENERGY PARTNERS LLC, CALEDONIA GAS STORAGE FACILITY | CALEDONIA, Lowndes, MS | Pass | State |
| 2021-10-07 | CALEDONIA ENERGY PARTNERS LLC, CALEDONIA GAS STORAGE FACILITY | CALEDONIA, Lowndes, MS | Pass | State |
| 2021-10-07 | CALEDONIA ENERGY PARTNERS LLC, CALEDONIA GAS STORAGE FACILITY | CALEDONIA, Lowndes, MS | Pass | State |
| 2021-10-07 | CALEDONIA ENERGY PARTNERS LLC, CALEDONIA GAS STORAGE FACILITY | CALEDONIA, Lowndes, MS | Pass | State |
| 2021-10-07 | USG INTERIORS LLC | GREENVILLE, Washington, MS | Pass | State |
| 2021-10-07 | PCS PHOSPHATE COMPANY, INC. - AURORA | AURORA, Beaufort, NC | Pass | State |
| 2021-10-07 | WHEELABRATOR GLOU CO LP (SES GLOUCESTER) | WEST DEPTFORD, TOWNSHIP OF, Gloucester, NJ | Pass | State |
| 2021-10-07 | HF SINCLAIR NAVAJO REFINING LLC (ARTESIA) — high-priority violation on file | ARTESIA, Eddy, NM | Pass | State |
| 2021-10-07 | ALBUQUERQUE PRODUCTS TERMINAL | ALBUQUERQUE, Bernalillo, NM | Pass | Local |
| 2021-10-07 | GOLDSTRIKE MINE | CARLIN, Eureka, NV | Pass | State |
| 2021-10-07 | EOG RESOURCES, INC. - JD CR AUG PAD | CARROLLTON, Carroll, OH | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.