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 |
|---|---|---|---|---|
| 2021-12-14 | RJ BOOSTER STATION | LOCO HILLS, Eddy, NM | Pass | State |
| 2021-12-14 | RJ BOOSTER STATION | LOCO HILLS, Eddy, NM | Pass | State |
| 2021-12-14 | RJ BOOSTER STATION | LOCO HILLS, Eddy, NM | Pass | State |
| 2021-12-14 | BRININSTOOL COMPRESSOR STATION | EUNICE, Lea, NM | Pass | State |
| 2021-12-14 | BRININSTOOL COMPRESSOR STATION | EUNICE, Lea, NM | Pass | State |
| 2021-12-14 | PAN MINE PROJECT | EUREKA, White Pine, NV | Pass | State |
| 2021-12-14 | STARRETT CITY POWER PLANT | BROOKLYN, Kings, NY | Pass | State |
| 2021-12-14 | THE SCOTTS CO. | MARYSVILLE, Union, OH | Pass | State |
| 2021-12-14 | THE SCOTTS CO. | MARYSVILLE, Union, OH | Pass | State |
| 2021-12-14 | THE SCOTTS CO. | MARYSVILLE, Union, OH | Pass | State |
| 2021-12-14 | THE SCOTTS CO. | MARYSVILLE, Union, OH | Pass | State |
| 2021-12-14 | THE SCOTTS CO. | MARYSVILLE, Union, OH | Pass | State |
| 2021-12-14 | THE SCOTTS CO. | MARYSVILLE, Union, OH | Pass | State |
| 2021-12-14 | NIPPON SANSO MATHESON, INC. | LIMA, Allen, OH | Pass | State |
| 2021-12-14 | NIPPON SANSO MATHESON, INC. | LIMA, Allen, OH | Fail | State |
| 2021-12-14 | FUCHS PAD 952477 | CLARINGTON, Monroe, OH | Pass | State |
| 2021-12-14 | FUCHS PAD 952477 | CLARINGTON, Monroe, OH | Pass | State |
| 2021-12-14 | FUCHS PAD 952477 | CLARINGTON, Monroe, OH | Pass | State |
| 2021-12-14 | MOSER PAD 952658 | CLARINGTON, Monroe, OH | Pass | State |
| 2021-12-14 | MOSER PAD 952658 | CLARINGTON, Monroe, OH | Pass | State |
| 2021-12-14 | MOSER PAD 952658 | CLARINGTON, Monroe, OH | Pass | State |
| 2021-12-14 | INR MIDSTREAM, LLC - REUSSER | LEWISVILLE, Monroe, OH | Pass | State |
| 2021-12-14 | INR MIDSTREAM, LLC - REUSSER | LEWISVILLE, Monroe, OH | Pass | State |
| 2021-12-14 | INR MIDSTREAM, LLC - REUSSER | LEWISVILLE, Monroe, OH | Pass | State |
| 2021-12-14 | INR MIDSTREAM, LLC - REUSSER | LEWISVILLE, Monroe, OH | Pass | State |
| 2021-12-14 | INR MIDSTREAM, LLC - REUSSER | LEWISVILLE, Monroe, OH | Pass | State |
| 2021-12-14 | INR MIDSTREAM, LLC - REUSSER | LEWISVILLE, Monroe, OH | Pass | State |
| 2021-12-14 | PINNACLE GAS PRODUCERS LLC | MORAINE, Montgomery, OH | Pass | State |
| 2021-12-14 | PINNACLE GAS PRODUCERS LLC | MORAINE, Montgomery, OH | Pass | State |
| 2021-12-14 | PINNACLE GAS PRODUCERS LLC | MORAINE, Montgomery, OH | Pass | State |
| 2021-12-14 | ET GATHERING PROCESSING LLC / FRISCO COMPRESSOR STATION | CHICKASHA, Grady, OK | Pass | State |
| 2021-12-14 | ET GATHERING PROCESSING LLC / FRISCO COMPRESSOR STATION | CHICKASHA, Grady, OK | Pass | State |
| 2021-12-14 | VM ARKOMA STACK LLC / MERIDIAN COMPRESSOR STATION | CALVIN, Hughes, OK | Pass | State |
| 2021-12-14 | DCP OPERATING CO LP / CRESCENT STATION | CRESCENT, Kingfisher, OK | Pass | State |
| 2021-12-14 | MARKWEST OKLAHOMA GAS CO LLC / KERNS CANAAN POD 5 COMPRESSOR STATION | MCALESTER, Pittsburg, OK | Pass | State |
| 2021-12-14 | MARKWEST OKLAHOMA GAS CO LLC / MYER MOUNTAIN COMPRESSOR STATION — high-priority violation on file | SCIPIO, Pittsburg, OK | Pass | State |
| 2021-12-14 | MARKWEST OKLAHOMA GAS CO LLC / MYER MOUNTAIN COMPRESSOR STATION — high-priority violation on file | SCIPIO, Pittsburg, OK | Pass | State |
| 2021-12-14 | ET GATHERING PROCESSING LLC / TRI COUNTY COMPRESSOR STATION | MARLOW, Stephens, OK | Pass | State |
| 2021-12-14 | ET GATHERING PROCESSING LLC / TRI COUNTY COMPRESSOR STATION | MARLOW, Stephens, OK | Pass | State |
| 2021-12-14 | ET GATHERING PROCESSING LLC / TRI COUNTY COMPRESSOR STATION | MARLOW, Stephens, OK | Pass | State |
| 2021-12-14 | UNITED REFINING CO/WARREN PLT | WARREN, Warren, PA | Pass | State |
| 2021-12-14 | HEIDELBERG MATERIALS US CEMENT LLC/EVANSVILLE CEMENT PLT & Q — high-priority violation on file | FLEETWOOD, Berks, PA | Pass | State |
| 2021-12-14 | EASTERN GAS TRANS & STORAGE INC/OAKFORD COMPRESSOR STA | DELMONT, Westmoreland, PA | Pass | State |
| 2021-12-14 | M SIMON ZOOK CO DBA GOLDEN BARREL PROD/LEOLA | LEOLA, Lancaster, PA | Pass | State |
| 2021-12-14 | EXPAND OPERATING LLC/RU-46 DROPP WELLPAD | SUSQUEHANNA, Susquehanna, PA | Pass | State |
| 2021-12-14 | PA GEN ENERGY CO LLC/COP TRACT 596 PAD B | ROARING BRANCH, Tioga, PA | Pass | State |
| 2021-12-14 | CROWN BEVERAGE PACKAGING | CHERAW, Chesterfield, SC | Pass | State |
| 2021-12-14 | COPE STATION | COPE, Orangeburg, SC | Pass | State |
| 2021-12-14 | COPE STATION | COPE, Orangeburg, SC | Pass | State |
| 2021-12-14 | SOUTH DAKOTA SOYBEAN PROCESSORS - VOLGA | VOLGA, Brookings, SD | Pass | State |
| 2021-12-14 | POET BIOREFINING - GROTON | GROTON, Brown, SD | Pass | State |
| 2021-12-14 | MUELLER CO. LLC — high-priority violation on file | CHATTANOOGA, Hamilton, TN | Pass | Local |
| 2021-12-14 | ASH GROVE CEMENT | MIDLOTHIAN, Ellis, TX | N/A | State |
| 2021-12-14 | ST. GEORGE POWER MILLCREEK/RED ROCK | UTAH, Undetermined, UT | Pass | State |
| 2021-12-14 | ST. GEORGE POWER MILLCREEK/RED ROCK | UTAH, Undetermined, UT | Pass | State |
| 2021-12-14 | TRIDENT GRAPHICS N A LLC | CHESTER, Chesterfield, VA | Pass | State |
| 2021-12-14 | WESTROCK LONGVIEW LLC — high-priority violation on file | LONGVIEW, Cowlitz, WA | Pass | State |
| 2021-12-14 | NUTRIEN | KENNEWICK, Benton, WA | Pass | Local |
| 2021-12-14 | GRAYS HARBOR ENERGY LLC | ELMA, Grays Harbor, WA | Pass | Local |
| 2021-12-14 | WORTHINGTON CYLINDERS CHILTON DIVISION | CHILTON, Calumet, WI | Pass | State |
| 2021-12-14 | HYDRITE CHEMICAL CO. — high-priority violation on file | COTTAGE GROVE, Dane, WI | Pass | State |
| 2021-12-14 | MONONGAHELA POWER COMPANY, FORT MARTIN STATION | MAIDSVILLE, Monongalia, WV | Pass | State |
| 2021-12-14 | 50 BUTTES PLANT (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2021-12-13 | MISSION CREEK OPCO, LLC - DORCHEAT GAS PLANT | MAGNOLIA, Columbia, AR | Pass | State |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-12-13 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
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.