EPA Air · stack tests by year
Air-emissions stack tests in 2024
- 39,252Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
States, 2024
- California 18,905
- Ohio 2,721
- Oklahoma 1,804
- Indiana 1,704
- New Mexico 1,428
- Florida 1,427
- Wyoming 1,285
- Georgia 1,104
- Pennsylvania 905
- Alabama 721
- Arkansas 569
- Missouri 539
- Iowa 464
- Mississippi 437
- Colorado 400
- Washington 338
- Texas 271
- Wisconsin 269
- North Carolina 254
- Minnesota 250
- West Virginia 230
- South Carolina 223
- Kentucky 218
- Delaware 185
- Montana 180
- Michigan 159
- Virginia 159
- Alaska 158
- Utah 157
- Tennessee 155
- Nebraska 150
- North Dakota 138
- Arizona 126
- Connecticut 122
- New York 115
- Maine 114
- Louisiana 113
- Illinois 109
- Idaho 91
- Nevada 88
- Hawaii 67
- Kansas 64
- New Hampshire 61
- South Dakota 59
- Maryland 58
- Massachusetts 52
- Oregon 35
- Rhode Island 29
- District of Columbia 25
- New Jersey 8
- Puerto Rico 5
- Vermont 4
Other years
Air-emissions stack tests recorded in 2024
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2024-10-21 | IRON HORSE MIDSTREAM LLC / IRON HORSE PROCESSING PLANT | AMBER, Grady, OK | Pass | State |
| 2024-10-21 | GULFPORT MIDCON LLC / JEANNIE D PAD | ALEX, Grady, OK | Pass | State |
| 2024-10-21 | GULFPORT MIDCON LLC / SCR B PAD | RUSH SPRINGS, Grady, OK | Pass | State |
| 2024-10-21 | TOM STACK LLC / BENNETT COMPRESSOR STATION | STILLWATER, Payne, OK | Pass | State |
| 2024-10-21 | MAINESBURG GS LP/WELLS COMP STA | COVINGTON, Tioga, PA | Fail | State |
| 2024-10-21 | NYDIG DFM LLC - DUCHESNE DATA POWER STATION (FORMERLY CRUSOE ENERGY SYSTEMS) | UPALCO, Duchesne, UT | Pass | State |
| 2024-10-21 | PACIFICORP LAKESIDE (SUMMIT VINEYARD) | VINEYARD, Utah, UT | Pass | State |
| 2024-10-21 | COMPASS MINERALS | UTAH, Undetermined, UT | Pass | State |
| 2024-10-21 | COMPASS MINERALS | UTAH, Undetermined, UT | Pass | State |
| 2024-10-21 | KING COUNTY WASTEWATER TREATMENT DIVISION WEST POINT TREATMENT PLANT | SEATTLE, King, WA | Pass | Local |
| 2024-10-21 | KING COUNTY WASTEWATER TREATMENT DIVISION WEST POINT TREATMENT PLANT | SEATTLE, King, WA | Pass | Local |
| 2024-10-21 | KING COUNTY WASTEWATER TREATMENT DIVISION WEST POINT TREATMENT PLANT | SEATTLE, King, WA | Pass | Local |
| 2024-10-21 | KING COUNTY WASTEWATER TREATMENT DIVISION WEST POINT TREATMENT PLANT | SEATTLE, King, WA | Pass | Local |
| 2024-10-21 | KING COUNTY WASTEWATER TREATMENT DIVISION WEST POINT TREATMENT PLANT | SEATTLE, King, WA | Pass | Local |
| 2024-10-21 | KING COUNTY WASTEWATER TREATMENT DIVISION WEST POINT TREATMENT PLANT | SEATTLE, King, WA | Pass | Local |
| 2024-10-21 | KING COUNTY WASTEWATER TREATMENT DIVISION WEST POINT TREATMENT PLANT | SEATTLE, King, WA | Pass | Local |
| 2024-10-21 | WISCONSIN ELECTRIC POWER COMPANY D/B/A WE ENERGIES-PARIS GENERATING STATION | UNION GROVE, Kenosha, WI | Pass | State |
| 2024-10-21 | QUAD/GRAPHICS INC | SUSSEX, Waupaca, WI | Pass | State |
| 2024-10-20 | HILCORP ALASKA, LLC / GATHERING CENTER #2 (GC 2) | NORTH SLOPE BOROUGH, North Slope, AK | Pass | State |
| 2024-10-20 | VENTURE GLOBAL PLAQUEMINES LNG LLC - PLAQUEMINES LNG TERMINAL | PORT SULPHUR, Plaquemines, LA | Pass | State |
| 2024-10-20 | MIDDLETOWN COKE COMPANY, LLC — high-priority violation on file | MIDDLETOWN, Butler, OH | Fail | State |
| 2024-10-19 | HILCORP ALASKA, LLC / GATHERING CENTER #2 (GC 2) | NORTH SLOPE BOROUGH, North Slope, AK | Pass | State |
| 2024-10-19 | INTERNATIONAL PAPER COMPANY | PRATTVILLE, Autauga, AL | Pass | State |
| 2024-10-19 | INTERNATIONAL PAPER COMPANY | PRATTVILLE, Autauga, AL | Pass | State |
| 2024-10-19 | INTERNATIONAL PAPER COMPANY | PRATTVILLE, Autauga, AL | Pass | State |
| 2024-10-19 | COLORADO INTERSTATE GAS- KIT CARSON C.S. | KIT CARSON 6.6 MI. S OF, Cheyenne, CO | Pass | State |
| 2024-10-19 | VENTURE GLOBAL PLAQUEMINES LNG LLC - PLAQUEMINES LNG TERMINAL | PORT SULPHUR, Plaquemines, LA | Pass | State |
| 2024-10-19 | MIDDLETOWN COKE COMPANY, LLC — high-priority violation on file | MIDDLETOWN, Butler, OH | Pass | State |
| 2024-10-19 | MIDDLETOWN COKE COMPANY, LLC — high-priority violation on file | MIDDLETOWN, Butler, OH | Pass | State |
| 2024-10-19 | MIDDLETOWN COKE COMPANY, LLC — high-priority violation on file | MIDDLETOWN, Butler, OH | Pass | State |
| 2024-10-19 | MIDDLETOWN COKE COMPANY, LLC — high-priority violation on file | MIDDLETOWN, Butler, OH | Pass | State |
| 2024-10-19 | MIDDLETOWN COKE COMPANY, LLC — high-priority violation on file | MIDDLETOWN, Butler, OH | Pass | State |
| 2024-10-18 | TRANSCONTINENTAL GAS PIPE LINE COMPANY L | BUTLER, Choctaw, AL | Pass | State |
| 2024-10-18 | TRANSCONTINENTAL GAS PIPE LINE COMPANY L | BUTLER, Choctaw, AL | Pass | State |
| 2024-10-18 | TRANSCONTINENTAL GAS PIPE LINE COMPANY L | BUTLER, Choctaw, AL | Pass | State |
| 2024-10-18 | PHOENIX CEMENT | CLARKDALE, Yavapai, AZ | Pass | State |
| 2024-10-18 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2024-10-18 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2024-10-18 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2024-10-18 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2024-10-18 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2024-10-18 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2024-10-18 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2024-10-18 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2024-10-18 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2024-10-18 | CALAVERAS MATERIALS — high-priority violation on file | MERCED, Merced, CA | Pass | Local |
| 2024-10-18 | CALAVERAS MATERIALS — high-priority violation on file | MERCED, Merced, CA | Pass | Local |
| 2024-10-18 | CALAVERAS MATERIALS — high-priority violation on file | MERCED, Merced, CA | Pass | Local |
| 2024-10-18 | UTAH GAS - DRAGON TRAIL — high-priority violation on file | RANGELY 16.7 MI. S OF, Rio Blanco, CO | Pass | State |
| 2024-10-18 | KALAELOA PARTNERS | KAPOLEI, Honolulu, HI | Pass | State |
| 2024-10-18 | GRAIN PROCESSING CORPORATION — high-priority violation on file | WASHINGTON, Daviess, IN | Pass | State |
| 2024-10-18 | CLEVELAND-CLIFFS STEEL LLC — high-priority violation on file | EAST CHICAGO, Lake, IN | Pass | State |
| 2024-10-18 | CLEVELAND-CLIFFS STEEL LLC — high-priority violation on file | EAST CHICAGO, Lake, IN | Pass | State |
| 2024-10-18 | CLEVELAND-CLIFFS STEEL LLC — high-priority violation on file | EAST CHICAGO, Lake, IN | Pass | State |
| 2024-10-18 | CLEVELAND-CLIFFS STEEL LLC — high-priority violation on file | EAST CHICAGO, Lake, IN | Pass | State |
| 2024-10-18 | MILESTONE CONTRACTORS LP | KIMMELL, Noble, IN | Pass | State |
| 2024-10-18 | MILESTONE CONTRACTORS LP | KIMMELL, Noble, IN | Pass | State |
| 2024-10-18 | MILESTONE CONTRACTORS LP | KIMMELL, Noble, IN | Pass | State |
| 2024-10-18 | MILESTONE CONTRACTORS LP | KIMMELL, Noble, IN | Pass | State |
| 2024-10-18 | OAK GROVE POWER PRODUCERS (AIR) | ARCADIA, Crawford, KS | Pass | State |
| 2024-10-18 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2024-10-18 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2024-10-18 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2024-10-18 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2024-10-18 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2024-10-18 | ENERSYS, INC. — high-priority violation on file | WARRENSBURG, Johnson, MO | Pass | State |
| 2024-10-18 | NEW MADRID POWER PLANT-ASSOC ELEC COOP | MARSTON, New Madrid, MO | Pass | State |
| 2024-10-18 | MISSISSIPPI POWER COMPANY, CHEVRON COGENERATING PLANT | PASCAGOULA, Jackson, MS | Pass | State |
| 2024-10-18 | MISSISSIPPI POWER COMPANY, CHEVRON COGENERATING PLANT | PASCAGOULA, Jackson, MS | Pass | State |
| 2024-10-18 | MISSISSIPPI POWER COMPANY, CHEVRON COGENERATING PLANT | PASCAGOULA, Jackson, MS | Pass | State |
| 2024-10-18 | WEST FRASER US EWP LLC — high-priority violation on file | GUNTOWN, Lee, MS | Pass | State |
| 2024-10-18 | WEST FRASER US EWP LLC — high-priority violation on file | GUNTOWN, Lee, MS | Pass | State |
| 2024-10-18 | WEST FRASER US EWP LLC — high-priority violation on file | GUNTOWN, Lee, MS | Pass | State |
| 2024-10-18 | WEST FRASER US EWP LLC — high-priority violation on file | GUNTOWN, Lee, MS | Pass | State |
| 2024-10-18 | WEST FRASER US EWP LLC — high-priority violation on file | GUNTOWN, Lee, MS | Pass | State |
| 2024-10-18 | WEST FRASER US EWP LLC — high-priority violation on file | GUNTOWN, Lee, MS | Pass | State |
| 2024-10-18 | WEST FRASER US EWP LLC — high-priority violation on file | GUNTOWN, Lee, MS | Pass | State |
| 2024-10-18 | ROCKY MOUNTAIN POWER | HARDIN, Big Horn, MT | Pass | State |
| 2024-10-18 | ROCKY MOUNTAIN POWER | HARDIN, Big Horn, MT | Pass | State |
| 2024-10-18 | EOG - BODACIOUS LOCALIZED GAS LIFT STATION | JAL, Lea, NM | Pass | State |
| 2024-10-18 | EOG - BODACIOUS LOCALIZED GAS LIFT STATION | JAL, Lea, NM | Pass | State |
| 2024-10-18 | WILD SALSA CTB | JAL, Lea, NM | Pass | State |
| 2024-10-18 | CAESARS ENTERTAINMENT INCORPORATED - CAESARS CONSOLIDATED PROPERTIES | LAS VEGAS, Clark, NV | Pass | Local |
| 2024-10-18 | SOUTHERLY WASTEWATER TREATMENT CENTER | CUYAHOGA HEIGHTS, Cuyahoga, OH | Pass | State |
| 2024-10-18 | SOUTHERLY WASTEWATER TREATMENT CENTER | CUYAHOGA HEIGHTS, Cuyahoga, OH | Pass | State |
| 2024-10-18 | SOUTHERLY WASTEWATER TREATMENT CENTER | CUYAHOGA HEIGHTS, Cuyahoga, OH | Pass | State |
| 2024-10-18 | MARKWEST OKLAHOMA GAS CO LLC / BUFFALO CREEK PROCESSING PLANT — high-priority violation on file | SAYRE, Beckham, OK | Pass | State |
| 2024-10-18 | FW MIDCON I LLC / PATRICIA ANN 0304 1H 2H 3H 28 KELLNER | PURDY, Garvin, OK | Pass | State |
| 2024-10-18 | VALIDUS ENERGY II MIDCON LLC / BALUCHI EAST PAD | LINDSAY, Garvin, OK | Pass | State |
| 2024-10-18 | KAISER FRANCIS OIL CO / PRITCHARD 2 WELL PAD | CHICKASHA, Grady, OK | Pass | State |
| 2024-10-18 | XTO ENERGY INC / BICE 20 1H PRODUCTION SITE | MANNSVILLE, Johnston, OK | Pass | State |
| 2024-10-18 | XTO ENERGY INC / MCCARTY 4 5 8HX17X20X29 PRODUCTION SIT | MARIETTA, Love, OK | Pass | State |
| 2024-10-18 | PINE RUN MIDSTREAM LLC/BICKER COMP STA | CABOT, Butler, PA | Pass | State |
| 2024-10-18 | HOSPITAL DE LA CONCEPCION | SAN GERMAN, San German, PR | Pass | U.S. EPA |
| 2024-10-18 | VIATRIS (FKA PFIZER) | VEGA BAJA, Vega Baja, PR | Pass | U.S. EPA |
| 2024-10-18 | SALT LAKE ENERGY SYSTEMS LLC | SALT LAKE CITY, Salt Lake, UT | Pass | State |
| 2024-10-18 | COMPASS MINERALS | UTAH, Undetermined, UT | Pass | State |
| 2024-10-18 | AMAZON DATA SERVICES, INC. IAD-51 IAD-56 IAD-88 IAD-89 | STERLING, Loudoun, VA | Pass | State |
| 2024-10-18 | DIGITAL REALTY - STERLING PREMIERE LLC | STERLING, Loudoun, VA | Pass | State |
| 2024-10-18 | WESTROCK VIRGINIA LLC - COVINGTON | COVINGTON, Covington (city), VA | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.