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.