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 |
|---|---|---|---|---|
| 2021-12-10 | SHELL PIPELINE CO. | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-10 | SHELL PIPELINE CO. | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-10 | SHELL PIPELINE CO. | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-10 | SHELL PIPELINE CO. | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-10 | SHELL PIPELINE CO. | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-10 | SHELL PIPELINE CO. | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-10 | SHELL PIPELINE CO. | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-10 | SHELL PIPELINE CO. | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-10 | SHELL PIPELINE CO. | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-10 | SHELL PIPELINE CO. | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-10 | SHELL PIPELINE CO. | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-10 | SHELL PIPELINE CO. | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-10 | SHELL PIPELINE CO. | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-10 | SHELL PIPELINE CO. | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-10 | SHELL PIPELINE CO. | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-10 | WES WATTENBURG - CENTRAL OIL STABIL | HUDSON 6.1 MI. N OF, Weld, CO | Pass | State |
| 2021-12-10 | INTERNATIONAL PAPER COMPANY | CANTONMENT, Escambia, FL | Pass | State |
| 2021-12-10 | POET BIOREFINING IOWA FALLS, LLC — high-priority violation on file | IOWA FALLS, Hardin, IA | Pass | State |
| 2021-12-10 | KEOKUK MILLS, LLC DBA KEOKUK STEEL CASTINGS, INC. | KEOKUK, Lee, IA | Pass | State |
| 2021-12-10 | KEOKUK MILLS, LLC DBA KEOKUK STEEL CASTINGS, INC. | KEOKUK, Lee, IA | Pass | State |
| 2021-12-10 | HARSHMAN CONST. - MELVERN QUARRY (AIR) | MELVERN, Osage, KS | Pass | State |
| 2021-12-10 | APAC-KANSAS CITY SHEARS DIV (MASTER EQUIP LIST)(AIR) | LINCOLN, Lincoln, KS | Pass | State |
| 2021-12-10 | SAPPI NORTH AMERICA, INC. | SKOWHEGAN, Somerset, ME | Pass | State |
| 2021-12-10 | EMPIRE DISTRICT ELECTRIC CO. - STATE LINE POWER PLANT | JOPLIN, Jasper, MO | Pass | State |
| 2021-12-10 | GLOBAL CELLULOSE FIBERS - RIEGELWOOD MILL | RIEGELWOOD, Columbus, NC | Pass | State |
| 2021-12-10 | INTERNATIONAL TIE DISPOSAL, LLC - PROJECT TIE — high-priority violation on file | HAMLET, Richmond, NC | Pass | State |
| 2021-12-10 | TARGA BADLANDS, LLC - LITTLE MISSOURI GAS PLANT (LMGP) AND SMOKEY COMPRESSOR STA | WATFORD CITY, McKenzie, ND | Pass | State |
| 2021-12-10 | TARGA BADLANDS, LLC - LITTLE MISSOURI GAS PLANT (LMGP) AND SMOKEY COMPRESSOR STA | WATFORD CITY, McKenzie, ND | Pass | State |
| 2021-12-10 | BULLDOG COMPRESSOR STATION | LOCO HILLS, Eddy, NM | Pass | State |
| 2021-12-10 | PNM - LORDSBURG GENERATING STATION | LORDSBURG, Hidalgo, NM | Pass | State |
| 2021-12-10 | LOVELOCK COMPRESSOR STATION #6 | LOVELOCK, Pershing, NV | Pass | State |
| 2021-12-10 | MARKWEST HARRISON WEST COMPRESSOR STATION | FREEPORT, Harrison, OH | Pass | State |
| 2021-12-10 | MARKWEST HARRISON WEST COMPRESSOR STATION | FREEPORT, Harrison, OH | Pass | State |
| 2021-12-10 | MARKWEST HARRISON WEST COMPRESSOR STATION | FREEPORT, Harrison, OH | Pass | State |
| 2021-12-10 | HOWMET AEROSPACE INC. | CUYAHOGA HEIGHTS, Cuyahoga, OH | Pass | State |
| 2021-12-10 | HOWMET AEROSPACE INC. | CUYAHOGA HEIGHTS, Cuyahoga, OH | Pass | State |
| 2021-12-10 | UNIVERSITY OF CINCINNATI | CINCINNATI, Hamilton, OH | Pass | State |
| 2021-12-10 | UNIVERSITY OF CINCINNATI | CINCINNATI, Hamilton, OH | Pass | State |
| 2021-12-10 | UNIVERSITY OF CINCINNATI | CINCINNATI, Hamilton, OH | Pass | State |
| 2021-12-10 | UNIVERSITY OF CINCINNATI | CINCINNATI, Hamilton, OH | Pass | State |
| 2021-12-10 | DOLESE BROS CO / ARDMORE QUARRY | ARDMORE, Carter, OK | Pass | State |
| 2021-12-10 | HEXION INC. | SPRINGFIELD, Lane, OR | Pass | Local |
| 2021-12-10 | CLEVELAND CLIFFS STEEL CORP/ BUTLER WORKS | BUTLER, Butler, PA | Pass | State |
| 2021-12-10 | ALLEGHENY LUDLUM LLC/BRACKENRIDGE | BRACKENRIDGE, Allegheny, PA | Pass | Local |
| 2021-12-10 | ALLEGHENY LUDLUM LLC/BRACKENRIDGE | BRACKENRIDGE, Allegheny, PA | Pass | Local |
| 2021-12-10 | COPE STATION | COPE, Orangeburg, SC | Pass | State |
| 2021-12-10 | WHEELER DATA CENTER | STERLING, Loudoun, VA | Pass | State |
| 2021-12-10 | STARBUCKS MANUFACTURING CORPORATION | KENT, King, WA | Pass | Local |
| 2021-12-10 | AMERICAN BITUMINOUS POWER PARTNERS, L. P., GRANT | GRANT TOWN, Marion, WV | Pass | State |
| 2021-12-10 | EQT XL MIDSTREAM OPERATING LLC, LEGACY CONDENSATE PAD | PROCTOR, Marshall, WV | Pass | State |
| 2021-12-10 | JIM BRIDGER PLANT (PACIFICORP) — high-priority violation on file | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2021-12-09 | ET GATHERING & PROCESSING LLC. - MAGAZINE COMPRESSOR STATION | BOONEVILLE, Logan, AR | Pass | State |
| 2021-12-09 | DESOTO GATHEIRNG COMPANY, LLC - GRAVEL HILL CPF-2 | CLEVELAND (HISTORICAL), TOWNSHIP OF, Van Buren, AR | Pass | State |
| 2021-12-09 | DESOTO GATHERING COMPANY, LLC - GRAVEL HILL CPF-4 | SCOTLAND, Van Buren, AR | Pass | State |
| 2021-12-09 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-09 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-09 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-09 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-09 | SUNCOR ENERGY - DENVER REFINERY — high-priority violation on file | COMMERCE CITY, Adams, CO | Pass | State |
| 2021-12-09 | MORGAN COUNTY - MORGAN CO LANDFILL | FORT MORGAN 3.7 MI. NE OF, Morgan, CO | Pass | State |
| 2021-12-09 | BONANZA CREEK - ANTELOPE CPF 13-21 | KERSEY 10.4 MI. E OF, Weld, CO | Pass | State |
| 2021-12-09 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | DELAWARE CITY, New Castle, DE | Pass | State |
| 2021-12-09 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | DELAWARE CITY, New Castle, DE | Pass | State |
| 2021-12-09 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | DELAWARE CITY, New Castle, DE | Pass | State |
| 2021-12-09 | DUKE ENERGY FLORIDA, LLC | CRYSTAL RIVER, Citrus, FL | Pass | State |
| 2021-12-09 | DUKE ENERGY FLORIDA, LLC | CRYSTAL RIVER, Citrus, FL | Pass | State |
| 2021-12-09 | ASCEND PERFORMANCE MATERIALS OPERATIONS — high-priority violation on file | CANTONMENT, Escambia, FL | Pass | State |
| 2021-12-09 | ASCEND PERFORMANCE MATERIALS OPERATIONS — high-priority violation on file | CANTONMENT, Escambia, FL | Pass | State |
| 2021-12-09 | ASCEND PERFORMANCE MATERIALS OPERATIONS — high-priority violation on file | CANTONMENT, Escambia, FL | Pass | State |
| 2021-12-09 | ASCEND PERFORMANCE MATERIALS OPERATIONS — high-priority violation on file | CANTONMENT, Escambia, FL | Pass | State |
| 2021-12-09 | INTERNATIONAL PAPER COMPANY | CANTONMENT, Escambia, FL | Pass | State |
| 2021-12-09 | INTERNATIONAL PAPER COMPANY | CANTONMENT, Escambia, FL | Pass | State |
| 2021-12-09 | INTERNATIONAL PAPER COMPANY | CANTONMENT, Escambia, FL | Pass | State |
| 2021-12-09 | INTERNATIONAL PAPER COMPANY | CANTONMENT, Escambia, FL | Pass | State |
| 2021-12-09 | INTERNATIONAL PAPER COMPANY | CANTONMENT, Escambia, FL | Pass | State |
| 2021-12-09 | INTERNATIONAL PAPER COMPANY | CANTONMENT, Escambia, FL | Pass | State |
| 2021-12-09 | INTERNATIONAL PAPER COMPANY | CANTONMENT, Escambia, FL | Pass | State |
| 2021-12-09 | MOSAIC FERTILIZER, LLC | PLANT CITY, Hillsborough, FL | Pass | State |
| 2021-12-09 | ST. MARKS POWDER, INC. | CRAWFORDVILLE, Wakulla, FL | Pass | State |
| 2021-12-09 | AGRI-PRODUCTS, INC. | FITZGERALD, Ben Hill, GA | Pass | State |
| 2021-12-09 | AGRI-PRODUCTS, INC. | FITZGERALD, Ben Hill, GA | Pass | State |
| 2021-12-09 | AGRI-PRODUCTS, INC. | FITZGERALD, Ben Hill, GA | Pass | State |
| 2021-12-09 | INTERNATIONAL PAPER COMPANY - ROME MILL | ROME, Floyd, GA | Pass | State |
| 2021-12-09 | TRANSCONTINENTAL GAS PIPE LINE CO LLC - COMPRESSOR STATION 125 | MONROE, Walton, GA | Pass | State |
| 2021-12-09 | TRANSCONTINENTAL GAS PIPE LINE CO LLC - COMPRESSOR STATION 125 | MONROE, Walton, GA | Pass | State |
| 2021-12-09 | POET BIOREFINING IOWA FALLS, LLC — high-priority violation on file | IOWA FALLS, Hardin, IA | Pass | State |
| 2021-12-09 | DOLCO PACKAGING CORPORATION | DECATUR, Adams, IN | Pass | State |
| 2021-12-09 | GARFIELD FACILITY LLC — high-priority violation on file | MUNCIE, Delaware, IN | Pass | State |
| 2021-12-09 | ET GATHERING & PROCESSING - HUGOTON #1 STATION (AIR) | HUGOTON, Haskell, KS | Pass | State |
| 2021-12-09 | TESSENDERLO KERLEY (AIR) | COFFEYVILLE, Montgomery, KS | Pass | State |
| 2021-12-09 | SAPPI NORTH AMERICA, INC. | SKOWHEGAN, Somerset, ME | Pass | State |
| 2021-12-09 | FCA US LLC WARREN TRUCK ASSEMBLY PLANT — high-priority violation on file | WARREN, Macomb, MI | Pending | State |
| 2021-12-09 | FCA US LLC WARREN TRUCK ASSEMBLY PLANT — high-priority violation on file | WARREN, Macomb, MI | Pending | State |
| 2021-12-09 | EMPIRE DISTRICT ELECTRIC CO. - STATE LINE POWER PLANT | JOPLIN, Jasper, MO | Pass | State |
| 2021-12-09 | ROXUL USA INC | BYHALIA, Marshall, MS | Pass | State |
| 2021-12-09 | ROXUL USA INC | BYHALIA, Marshall, MS | Pass | State |
| 2021-12-09 | ROXUL USA INC | BYHALIA, Marshall, MS | Pass | State |
| 2021-12-09 | BAKKEN GATHERING PLANT | SIDNEY, Richland, MT | Pass | State |
| 2021-12-09 | BAKKEN GATHERING PLANT | SIDNEY, Richland, MT | Pass | State |
| 2021-12-09 | ALEXANDRIA CENTER FOR LIFE SCIENCE DURHAM | DURHAM, Durham, NC | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.
What this page shows
This page covers Clean Air Act facilities in the EPA air register with stack tests in 2021. It lists 35,950 stack tests recorded nationwide in 2021.