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 |
|---|---|---|---|---|
| 2021-10-04 | CRESTWOOD CORPORATION | DOTHAN, Houston, AL | Pass | State |
| 2021-10-04 | FREEBIRD GAS STORAGE | DETROIT, Lamar, AL | Pass | State |
| 2021-10-04 | DESOTO GATHERING COMPANY, LLC - YELLOWSTONE CPF 1 | BEE BRANCH, Van Buren, AR | Pass | State |
| 2021-10-04 | DESOTO GATHERING COMPANY, LLC - YELLOWSTONE CPF 1 | BEE BRANCH, Van Buren, AR | Pass | State |
| 2021-10-04 | FREEPORT-MCMORAN SIERRITA | GREEN VALLEY, Pima, AZ | Pass | Local |
| 2021-10-04 | PHILLIPS 66 CO/LA REFINERY WILMINGTON — high-priority violation on file | WILMINGTON, Los Angeles, CA | Pass | Local |
| 2021-10-04 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-04 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-04 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-04 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-04 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-04 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-04 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-04 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-04 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-04 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-04 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-04 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-04 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-04 | GRAND RIVER GATH - OH14 WELL PAD | DEBEQUE 2.5 MI. NE OF, Mesa, CO | Pass | State |
| 2021-10-04 | DCP OPERATING CO - O'CONNOR GAS PLANT | KERSEY AREA, Weld, CO | Pass | State |
| 2021-10-04 | DCP OPERATING CO - O'CONNOR GAS PLANT | KERSEY AREA, Weld, CO | Pass | State |
| 2021-10-04 | MIAMI-DADE WATER AND SEWER DEPARTMENT | MIAMI, Miami-Dade, FL | Pass | State |
| 2021-10-04 | MIAMI-DADE WATER AND SEWER DEPARTMENT | MIAMI, Miami-Dade, FL | Pass | State |
| 2021-10-04 | CITY OF TAMPA | TAMPA, Hillsborough, FL | Pass | State |
| 2021-10-04 | CITY OF TAMPA | TAMPA, Hillsborough, FL | Pass | State |
| 2021-10-04 | CITY OF TAMPA | TAMPA, Hillsborough, FL | Pass | State |
| 2021-10-04 | CITY OF TAMPA | TAMPA, Hillsborough, FL | Pass | State |
| 2021-10-04 | CITY OF TAMPA | TAMPA, Hillsborough, FL | Pass | State |
| 2021-10-04 | CITY OF TAMPA | TAMPA, Hillsborough, FL | Pass | State |
| 2021-10-04 | CITY OF TAMPA | TAMPA, Hillsborough, FL | Pass | State |
| 2021-10-04 | EVERGY, INC. - JEFFREY ENERGY CENTER (AIR) | ST. MARY'S, Pottawatomie, KS | Pass | State |
| 2021-10-04 | FCA US LLC WARREN TRUCK ASSEMBLY PLANT — high-priority violation on file | WARREN, Macomb, MI | Fail | State |
| 2021-10-04 | MINNESOTA SOYBEAN PROCESSORS | BREWSTER, Nobles, MN | Pass | State |
| 2021-10-04 | MOM BRANDS | NORTHFIELD, Rice, MN | N/A | State |
| 2021-10-04 | ENERSYS ENERGY PRODUCTS INC - SPRINGFIELD 2 | SPRINGFIELD, Greene, MO | Fail | State |
| 2021-10-04 | EP ENGINEERED CLAYS CORPORATION — high-priority violation on file | JACKSON, Hinds, MS | Fail | State |
| 2021-10-04 | GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION | HARRISVILLE, Simpson, MS | Pass | State |
| 2021-10-04 | GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION | HARRISVILLE, Simpson, MS | Pass | State |
| 2021-10-04 | USG INTERIORS LLC | GREENVILLE, Washington, MS | Pass | State |
| 2021-10-04 | USG INTERIORS LLC | GREENVILLE, Washington, MS | Pass | State |
| 2021-10-04 | HESS NORTH DAKOTA PIPELINES LLC - HAWKEYE GAS FACILITY - AQ | CHARLSON, McKenzie, ND | Pass | State |
| 2021-10-04 | ANDEAVOR FIELD SERVICES LLC - STANLEY COMPRESSOR STATION - AQ | STANLEY, Mountrail, ND | Pass | State |
| 2021-10-04 | RAVEN NORTHBROOK LLC | SPRINGFIELD, Sarpy, NE | N/A | State |
| 2021-10-04 | RAVEN NORTHBROOK LLC | SPRINGFIELD, Sarpy, NE | N/A | State |
| 2021-10-04 | PHILLIPS 66 (BAYWAY REF/CONOCO) — high-priority violation on file | LINDEN, Union, NJ | Pass | State |
| 2021-10-04 | ONEOK FIELD SERVICES CO LLC / REDTAIL COMPRESSOR STATION | LINDSAY, Garvin, OK | Pass | State |
| 2021-10-04 | ONEOK FIELD SERVICES CO LLC / REDTAIL COMPRESSOR STATION | LINDSAY, Garvin, OK | Pass | State |
| 2021-10-04 | CONTINENTAL RESOURCES / CASH 2 26 23XHS MARTHA 3 35 2 11XHS | TABLER, Grady, OK | Pass | State |
| 2021-10-04 | BCE MACH III MIDSTREAM HOLDINGS LLC / WAY SOUTH COMPRESSOR STATION | CASHION, Kingfisher, OK | Pass | State |
| 2021-10-04 | BCE MACH III MIDSTREAM HOLDINGS LLC / WAY SOUTH COMPRESSOR STATION | CASHION, Kingfisher, OK | Pass | State |
| 2021-10-04 | BCE MACH III MIDSTREAM HOLDINGS LLC / WAY SOUTH COMPRESSOR STATION | CASHION, Kingfisher, OK | Pass | State |
| 2021-10-04 | SUPERIOR MIDSTREAM LLC / CASHION NORTH BOOSTER STATION (WASWO) | CASHION, Logan, OK | Pass | State |
| 2021-10-04 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/GODWIN COMP STA | WASHINGTON, Washington, PA | Pass | State |
| 2021-10-04 | LOAN ASSET ISSUER LLC/WEST FINLEY 1 WELL PAD | WEST FINLEY, Washington, PA | Pass | State |
| 2021-10-04 | SIMCOE - MIERA CENTRAL DELIVERY POINT | LA PLATA COUNTY, La Plata, CO | Pass | U.S. EPA |
| 2021-10-04 | SOUTH KARNES CENTRAL FACILITY | KENEDY, Karnes, TX | Pass | State |
| 2021-10-04 | LINHART CENTRAL FACILITY | KARNES CITY, Karnes, TX | Pass | State |
| 2021-10-04 | LINHART CENTRAL FACILITY | KARNES CITY, Karnes, TX | Pass | State |
| 2021-10-04 | NORTHWEST PIPELINE LLC- MOUNT VERNON | MOUNT VERNON, Skagit, WA | Pass | Local |
| 2021-10-04 | WILLIAMS OHIO VALLEY MIDSTREAM LLC, BURCH RIDGE ST | MOUNDSVILLE, Marshall, WV | Pass | State |
| 2021-10-03 | GATEWAY ENERGY & COKE CO LLC | GRANITE CITY, Madison, IL | Pass | State |
| 2021-10-02 | ADM FASCO MENDOTA RAIL | MENDOTA, La Salle, IL | Pass | State |
| 2021-10-02 | SANTEE COOPER CROSS GENERATING STATION — high-priority violation on file | PINEVILLE, Berkeley, SC | Pass | State |
| 2021-10-02 | SANTEE COOPER CROSS GENERATING STATION — high-priority violation on file | PINEVILLE, Berkeley, SC | Pass | State |
| 2021-10-01 | LHOIST NORTH AMERICA OF ALABAMA, LLC | CALERA, Shelby, AL | Pass | State |
| 2021-10-01 | LHOIST NORTH AMERICA OF ALABAMA, LLC | CALERA, Shelby, AL | Pass | State |
| 2021-10-01 | CERTAINTEED GYPSUM MANUFACTURING, INC. | NASHVILLE, Howard, AR | Pass | State |
| 2021-10-01 | ENTERGY ARKANSAS, LLC - WHITE BLUFF PLANT | REDFIELD, Jefferson, AR | Pass | State |
| 2021-10-01 | ENTERGY ARKANSAS, LLC - WHITE BLUFF PLANT | REDFIELD, Jefferson, AR | Pass | State |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2021-10-01 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.