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.