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 |
|---|---|---|---|---|
| 2021-10-18 | GREENLEAF CO2 SOLUTIONS LLC, WEST YELLOW CREEK COMPRESSOR STATION — high-priority violation on file | WAYNESBORO, Wayne, MS | Pass | State |
| 2021-10-18 | HILAND PARTNERS HOLDINGS LLC - WATFORD CITY GAS PLANT - AQ | ALEXANDER, McKenzie, ND | Pass | State |
| 2021-10-18 | WEST TURKEY TRACK BOOSTER — high-priority violation on file | LOCO HILLS, Eddy, NM | Pass | State |
| 2021-10-18 | WEST TURKEY TRACK BOOSTER — high-priority violation on file | LOCO HILLS, Eddy, NM | Pass | State |
| 2021-10-18 | ENTERPRISE - OXY SAND DUNES NORTH COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2021-10-18 | COTTON DRAW - MOON COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2021-10-18 | COTTON DRAW - MOON COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2021-10-18 | COTTON DRAW - MOON COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2021-10-18 | WIELAND CHASE LLC — high-priority violation on file | MONTPELIER, Williams, OH | Pass | State |
| 2021-10-18 | WIELAND CHASE LLC — high-priority violation on file | MONTPELIER, Williams, OH | Pass | State |
| 2021-10-18 | WIELAND CHASE LLC — high-priority violation on file | MONTPELIER, Williams, OH | Pass | State |
| 2021-10-18 | WIELAND CHASE LLC — high-priority violation on file | MONTPELIER, Williams, OH | Pass | State |
| 2021-10-18 | WIELAND CHASE LLC — high-priority violation on file | MONTPELIER, Williams, OH | Pass | State |
| 2021-10-18 | WIELAND CHASE LLC — high-priority violation on file | MONTPELIER, Williams, OH | Pass | State |
| 2021-10-18 | TOM STACK LLC / COMMUNITY COMPRESSOR STATION | OMEGA, Blaine, OK | Pass | State |
| 2021-10-18 | TOM STACK LLC / COMMUNITY COMPRESSOR STATION | OMEGA, Blaine, OK | Pass | State |
| 2021-10-18 | ET GATHERING PROCESSING LLC / PUMBA COMPRESSOR STATION | GREENFIELD, Blaine, OK | Pass | State |
| 2021-10-18 | MARKWEST OKLAHOMA GAS CO LLC / SPRAGUE COMPRESSOR STATION | COALGATE, Coal, OK | Pass | State |
| 2021-10-18 | MARKWEST PIONEER LLC / ARKOMA COMPRESSOR STATION | COALGATE, Coal, OK | Pass | State |
| 2021-10-18 | ET GATHERING PROCESSING LLC / TERRIER COMPRESSOR STATION | THOMAS, Custer, OK | Pass | State |
| 2021-10-18 | SUPERIOR MIDSTREAM LLC / HUNTER BOOSTER STATION | ENID, Garfield, OK | Pass | State |
| 2021-10-18 | BCE MACH III MIDSTREAM HOLDINGS LLC / ELMORE CITY GAS PLANT — high-priority violation on file | ELMORE CITY, Garvin, OK | Pass | State |
| 2021-10-18 | ET GATHERING PROCESSING LLC / BURTSCHI COMPRESSOR STATION | NORGE, Grady, OK | Pass | State |
| 2021-10-18 | ET GATHERING PROCESSING LLC / BURTSCHI COMPRESSOR STATION | NORGE, Grady, OK | Pass | State |
| 2021-10-18 | SUPERIOR MIDSTREAM LLC / CASHION GAS PLANT — high-priority violation on file | CASHION, Logan, OK | Pass | State |
| 2021-10-18 | ET GATHERING PROCESSING LLC / ROSE VALLEY PLANT | ALVA, Woods, OK | Pass | State |
| 2021-10-18 | ET GATHERING PROCESSING LLC / ROSE VALLEY PLANT | ALVA, Woods, OK | Pass | State |
| 2021-10-18 | ET GATHERING PROCESSING LLC / ROSE VALLEY PLANT | ALVA, Woods, OK | Pass | State |
| 2021-10-18 | PA DEPT OF LABOR & IND/HIRAM G ANDREWS CTR | JOHNSTOWN, Cambria, PA | Pass | State |
| 2021-10-18 | MARKWEST LIBERTY MIDSTREAM/SMITH COMP STA | BURGETTSTOWN, Washington, PA | Pass | State |
| 2021-10-18 | LOAN ASSET ISSUER LLC/WEST FINLEY 10 WELL PAD | WEST FINLEY, Washington, PA | Pass | State |
| 2021-10-18 | TENNESSEE OPERATIONS OF EASTMAN CHEMICAL COMPANY — high-priority violation on file | KINGSPORT, Sullivan, TN | Pass | State |
| 2021-10-18 | SALT LAKE ENERGY SYSTEMS LLC | SALT LAKE CITY, Salt Lake, UT | Pass | State |
| 2021-10-18 | AMERICAN PACKAGING CORP | COLUMBUS, Columbia, WI | Pending | State |
| 2021-10-18 | AZTALAN BIO | JOHNSON CREEK, Jefferson, WI | Pass | State |
| 2021-10-18 | WMWI - RIDGEVIEW RECYCLING AND DISPOSAL FACILITY | WHITELAW, Manitowoc, WI | Pass | State |
| 2021-10-18 | ARDAGH GLASS INC — high-priority violation on file | BURLINGTON, Richland, WI | Pass | State |
| 2021-10-17 | WEST FRASER- DUDLEY LUMBER MILL | DUDLEY, Laurens, GA | Pass | State |
| 2021-10-17 | WEST FRASER- DUDLEY LUMBER MILL | DUDLEY, Laurens, GA | N/A | State |
| 2021-10-17 | WEST FRASER- DUDLEY LUMBER MILL | DUDLEY, Laurens, GA | Pass | State |
| 2021-10-17 | WEST FRASER- DUDLEY LUMBER MILL | DUDLEY, Laurens, GA | Pass | State |
| 2021-10-17 | WEST FRASER- DUDLEY LUMBER MILL | DUDLEY, Laurens, GA | Pass | State |
| 2021-10-17 | WEST FRASER- DUDLEY LUMBER MILL | DUDLEY, Laurens, GA | Pass | State |
| 2021-10-17 | WEST FRASER- DUDLEY LUMBER MILL | DUDLEY, Laurens, GA | Pass | State |
| 2021-10-17 | CSP INNOVATIONS, INC. — high-priority violation on file | NORTH BALTIMORE, Wood, OH | Pass | State |
| 2021-10-17 | LONG RIDGE ENERGY GENERATION LLC - HANNIBAL POWER | HANNIBAL, Monroe, OH | Pass | State |
| 2021-10-17 | LONG RIDGE ENERGY GENERATION LLC - HANNIBAL POWER | HANNIBAL, Monroe, OH | Pass | State |
| 2021-10-17 | LONG RIDGE ENERGY GENERATION LLC - HANNIBAL POWER | HANNIBAL, Monroe, OH | Pass | State |
| 2021-10-17 | LONG RIDGE ENERGY GENERATION LLC - HANNIBAL POWER | HANNIBAL, Monroe, OH | Pass | State |
| 2021-10-17 | LONG RIDGE ENERGY GENERATION LLC - HANNIBAL POWER | HANNIBAL, Monroe, OH | Pass | State |
| 2021-10-16 | AURORA ENERGY LLC / CHENA POWER PLANT — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2021-10-16 | AURORA ENERGY LLC / CHENA POWER PLANT — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2021-10-16 | DOYON UTILITIES, LLC / FORT WAINWRIGHT (PRIVATIZED EMISSION UN | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2021-10-16 | CONOCOPHILLIPS ALASKA, INC. / ALPINE CENTRAL PROCESSING FACILITY | NORTH SLOPE BOROUGH, North Slope, AK | Pass | State |
| 2021-10-16 | PSEG KEYS ENERGY CENTER | BRANDYWINE, Prince George's, MD | Pass | State |
| 2021-10-15 | ROBERT'S TRUST COMPRESSOR STATION | DUNN COUNTY, Dunn, ND | Pass | U.S. EPA |
| 2021-10-15 | ROBERT'S TRUST COMPRESSOR STATION | DUNN COUNTY, Dunn, ND | Pass | U.S. EPA |
| 2021-10-15 | ROBERT'S TRUST COMPRESSOR STATION | DUNN COUNTY, Dunn, ND | Pass | U.S. EPA |
| 2021-10-15 | DOYON UTILITIES, LLC / FORT WAINWRIGHT (PRIVATIZED EMISSION UN | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2021-10-15 | CITY & BOROUGH OF SITKA / JARVIS ST. DIESEL PLANT | SITKA, Sitka City and Borough, AK | Pass | State |
| 2021-10-15 | CUSTOM WOOD RECYCLING, INC | DANVILLE, Yell, AR | Pass | State |
| 2021-10-15 | INTERNATIONAL PAPER - FLINT RIVER MILL | OGLETHORPE, Macon, GA | Pass | State |
| 2021-10-15 | APAC-ATLANTIC, INC. - MIDWAY ASPHALT PLANT | HINESVILLE, Liberty, GA | Pass | State |
| 2021-10-15 | APAC-ATLANTIC, INC. - MIDWAY ASPHALT PLANT | HINESVILLE, Liberty, GA | Pass | State |
| 2021-10-15 | 4513 WESTERN AVENUE LLC | LISLE, DuPage, IL | Pass | State |
| 2021-10-15 | BIG RIVERS ELECTRIC CORP - DB WILSON STATION — high-priority violation on file | CENTERTOWN, Ohio, KY | Pass | State |
| 2021-10-15 | CURR CREEK COMPRESSOR STATION - VERNON FIELD | CHATHAM, Jackson, LA | Pass | State |
| 2021-10-15 | SOUTHBRIDGE LANDFILL GAS MANAGEMENT | SOUTHBRIDGE, Worcester, MA | Pass | State |
| 2021-10-15 | ECO MAINE | PORTLAND, Cumberland, ME | Pass | State |
| 2021-10-15 | ST MARYS CEMENT U.S. LLC, CHARLEVOIX PLANT | CHARLEVOIX, Charlevoix, MI | Pass | State |
| 2021-10-15 | SOUTHWEST CLEAN WATER PLANT SPRINGFIELD | SPRINGFIELD, Greene, MO | Pending | State |
| 2021-10-15 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2021-10-15 | COLSTRIP STEAM ELECTRIC STATION | COLSTRIP, Rosebud, MT | Pass | State |
| 2021-10-15 | PCS PHOSPHATE COMPANY, INC. - AURORA | AURORA, Beaufort, NC | Pass | State |
| 2021-10-15 | NUCOR STEEL | NORFOLK, Madison, NE | Fail | State |
| 2021-10-15 | PHILLIPS 66 (BAYWAY REF/CONOCO) — high-priority violation on file | LINDEN, Union, NJ | Pass | State |
| 2021-10-15 | THE LUBRIZOL CORPORATION | PAINESVILLE, Lake, OH | Pass | State |
| 2021-10-15 | BLUE MOUNTAIN MIDSTREAM LLC / PREAKNESS COMPRESSOR STATION | UNION CITY, Canadian, OK | Pass | State |
| 2021-10-15 | BLUE MOUNTAIN MIDSTREAM LLC / PREAKNESS COMPRESSOR STATION | UNION CITY, Canadian, OK | Pass | State |
| 2021-10-15 | MARKWEST OKLAHOMA GAS CO LLC / DUNN COMPRESSOR STATION | STUART, Hughes, OK | Pass | State |
| 2021-10-15 | ET GATHERING PROCESSING LLC / SCOUT COMPRESSOR STATION | FREEDOM, Woods, OK | Pass | State |
| 2021-10-15 | ET GATHERING PROCESSING LLC / SCOUT COMPRESSOR STATION | FREEDOM, Woods, OK | Pass | State |
| 2021-10-15 | SONNEBORN INC/PETROLIA PLT | PETROLIA, Butler, PA | Pass | State |
| 2021-10-15 | EL PASO NATURAL GAS COMPANY - BONDAD COMPRESSOR STATION | DURANGO, La Plata, CO | Pass | State |
| 2021-10-15 | PORT ARTHUR REFINERY — high-priority violation on file | PORT ARTHUR, Jefferson, TX | Pass | State |
| 2021-10-15 | PORT ARTHUR REFINERY — high-priority violation on file | PORT ARTHUR, Jefferson, TX | Pass | State |
| 2021-10-15 | PORT ARTHUR REFINERY — high-priority violation on file | PORT ARTHUR, Jefferson, TX | Pass | State |
| 2021-10-15 | PORT ARTHUR REFINERY — high-priority violation on file | PORT ARTHUR, Jefferson, TX | Pass | State |
| 2021-10-15 | AMAZON DATA SERVICES, INC. IAD-10 IAD-32 IAD-98 IAD-99 IAD-118 IAD-119 IAD-129 | STERLING, Loudoun, VA | Pass | State |
| 2021-10-15 | HAMPTON LUMBER MILLS - RANDLE — high-priority violation on file | RANDLE, Lewis, WA | Pass | Local |
| 2021-10-15 | HF SINCLAIR PARCO REFINING LLC — high-priority violation on file | SINCLAIR, Carbon, WY | Pass | State |
| 2021-10-14 | ROBERT'S TRUST COMPRESSOR STATION | DUNN COUNTY, Dunn, ND | Pass | U.S. EPA |
| 2021-10-14 | DOYON UTILITIES, LLC / FORT WAINWRIGHT (PRIVATIZED EMISSION UN | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2021-10-14 | CONOCOPHILLIPS ALASKA, INC. / ALPINE CENTRAL PROCESSING FACILITY | NORTH SLOPE BOROUGH, North Slope, AK | Pass | State |
| 2021-10-14 | GP CELLULOSE ALABAMA RIVER CELLULOSE LLC | PERDUE HILL, Monroe, AL | Pass | State |
| 2021-10-14 | ASH GROVE CEMENT COMPANY | FOREMAN, Little River, AR | Pass | State |
| 2021-10-14 | DRAKE CEMENT- DRAKE ROAD SITE — high-priority violation on file | PAULDEN, Yavapai, AZ | Pass | State |
| 2021-10-14 | VICTOR VALLEY WASTEWATER RECLAMATION AUTHORITY | VICTORVILLE, San Bernardino, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.