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 |
|---|---|---|---|---|
| 2024-09-19 | ALYSON TB | LA HUERTA, Eddy, NM | Pass | State |
| 2024-09-19 | ENERGY TRANSFER COMPANY - DOMINATOR COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2024-09-19 | ENERGY TRANSFER COMPANY - DOMINATOR COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2024-09-19 | GOLDSTRIKE MINE | CARLIN, Eureka, NV | Pass | State |
| 2024-09-19 | AMRIZE CEMENT INC. | PAULDING, Paulding, OH | Pass | State |
| 2024-09-19 | AMRIZE CEMENT INC. | PAULDING, Paulding, OH | Pass | State |
| 2024-09-19 | MILL CREEK WWTP | CINCINNATI, Hamilton, OH | Pass | State |
| 2024-09-19 | MILL CREEK WWTP | CINCINNATI, Hamilton, OH | Pass | State |
| 2024-09-19 | VALIDUS ENERGY II MIDCON LLC / DAVIS PAD | WATONGA, Blaine, OK | Pass | State |
| 2024-09-19 | VALIDUS ENERGY II MIDCON LLC / CAYMUS 1 22H DUNN 1R 15H OIL AND GAS F | WATONGA, Blaine, OK | Pass | State |
| 2024-09-19 | FW MIDCON I LLC / MIKE 1708 2H 3H 4H 17X | LOYAL, Kingfisher, OK | Pass | State |
| 2024-09-19 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/GODWIN COMP STA | WASHINGTON, Washington, PA | Pass | State |
| 2024-09-19 | TENNESSEE GAS PIPELINE/COMP STA 303 | JAMESTOWN, Venango, PA | Pass | State |
| 2024-09-19 | REGENCY MARCELLUS GAS GATHERING LLC/MEHOOPANY STA | TUNKHANNOCK, Wyoming, PA | Pass | State |
| 2024-09-19 | EXPAND OPERATING LLC/RU-75 SGL-A WELLPAD | NEW MILFORD, Susquehanna, PA | Pass | State |
| 2024-09-19 | USS/CLAIRTON WORKS — high-priority violation on file | CLAIRTON, Allegheny, PA | Pass | Local |
| 2024-09-19 | CENTURY ALUMINUM OF SOUTH CAROLINA INC — high-priority violation on file | GOOSE CREEK, Berkeley, SC | Fail | State |
| 2024-09-19 | CENTURY ALUMINUM OF SOUTH CAROLINA INC — high-priority violation on file | GOOSE CREEK, Berkeley, SC | Pass | State |
| 2024-09-19 | SANTEE COOPER CROSS GENERATING STATION — high-priority violation on file | PINEVILLE, Berkeley, SC | Pass | State |
| 2024-09-19 | SANTEE COOPER CROSS GENERATING STATION — high-priority violation on file | PINEVILLE, Berkeley, SC | Pass | State |
| 2024-09-19 | AMERICAN SNUFF COMPANY, LLC | CLARKSVILLE, Montgomery, TN | Pass | State |
| 2024-09-19 | TENNESSEE VALLEY AUTHORITY - CUMBERLAND FOSSIL PLANT — high-priority violation on file | CUMBERLAND CITY, Stewart, TN | Pass | State |
| 2024-09-19 | MIDLOTHIAN ENERGY FACILITY | MIDLOTHIAN, Ellis, TX | N/A | State |
| 2024-09-19 | QTS RICHMOND DATA CENTER — high-priority violation on file | SANDSTON, Henrico, VA | Pass | State |
| 2024-09-19 | CALPINE MID-ATLANTIC GENERATION LLC - BAYVIEW | BAYVIEW, Northampton, VA | Pass | State |
| 2024-09-19 | CHEMTRADE SOLUTIONS LLC | ANACORTES, Skagit, WA | Pass | Local |
| 2024-09-19 | U.S. ENERGY GREEN BAY BUCKEYE TERMINAL | GREEN BAY, Brown, WI | Pass | State |
| 2024-09-19 | SONOCO METAL PACKAGING LLC | MILWAUKEE, Monroe, WI | Pass | State |
| 2024-09-19 | AMERICAN BITUMINOUS POWER PARTNERS, L. P., GRANT | GRANT TOWN, Marion, WV | Pass | State |
| 2024-09-19 | DTM APPALACHIA GATHERING, LLC, DAYBROOK STATION | FAIRVIEW, Marion, WV | Pass | State |
| 2024-09-19 | 50 BUTTES PLANT (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2024-09-19 | 50 BUTTES PLANT (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2024-09-19 | 50 BUTTES PLANT (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2024-09-19 | 50 BUTTES PLANT (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2024-09-19 | 50 BUTTES PLANT (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2024-09-19 | 50 BUTTES PLANT (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2024-09-19 | 50 BUTTES PLANT (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2024-09-19 | 50 BUTTES PLANT (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2024-09-19 | 50 BUTTES PLANT (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2024-09-19 | 50 BUTTES PLANT (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2024-09-19 | 50 BUTTES PLANT (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2024-09-19 | 50 BUTTES PLANT (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2024-09-19 | 50 BUTTES PLANT (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2024-09-19 | 50 BUTTES PLANT (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2024-09-19 | 50 BUTTES PLANT (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2024-09-19 | 50 BUTTES PLANT (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2024-09-19 | NEIL SIMPSON COMPLEX (BLACK HILLS CORPORATION) | GILLETTE, Campbell, WY | Pass | State |
| 2024-09-19 | NEIL SIMPSON COMPLEX (BLACK HILLS CORPORATION) | GILLETTE, Campbell, WY | Pass | State |
| 2024-09-19 | NEIL SIMPSON COMPLEX (BLACK HILLS CORPORATION) | GILLETTE, Campbell, WY | Pass | State |
| 2024-09-19 | NEIL SIMPSON COMPLEX (BLACK HILLS CORPORATION) | GILLETTE, Campbell, WY | Pass | State |
| 2024-09-19 | BOLT 35 COMPRESSOR STATION (EOG RESOURCES, INC.) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2024-09-19 | BOLT 35 COMPRESSOR STATION (EOG RESOURCES, INC.) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2024-09-19 | BOLT 35 COMPRESSOR STATION (EOG RESOURCES, INC.) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2024-09-19 | MICROSOFT CHEYENNE DATA CENTER (MICROSOFT CORPORATION) | CHEYENNE, Laramie, WY | Pass | State |
| 2024-09-19 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2024-09-19 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2024-09-19 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2024-09-19 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2024-09-19 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2024-09-19 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2024-09-19 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2024-09-19 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2024-09-19 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2024-09-19 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2024-09-19 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2024-09-19 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2024-09-19 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2024-09-19 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2024-09-19 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2024-09-19 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2024-09-19 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2024-09-19 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2024-09-19 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2024-09-19 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2024-09-18 | GAS PROCESSORS, INC. | BROOKLYN, Conecuh, AL | Pass | State |
| 2024-09-18 | GAS PROCESSORS, INC. | BROOKLYN, Conecuh, AL | Pass | State |
| 2024-09-18 | GAS PROCESSORS, INC. | BROOKLYN, Conecuh, AL | Pass | State |
| 2024-09-18 | LEWIS AGGREGATES, LLC | MIDLAND CITY, Dale, AL | Pass | State |
| 2024-09-18 | SOUTHERN NATURAL GAS | ELMORE, Elmore, AL | Pass | State |
| 2024-09-18 | SOUTHERN NATURAL GAS | ELMORE, Elmore, AL | Pass | State |
| 2024-09-18 | WESTROCK COMPANY, LLC | STEVENSON, Jackson, AL | Pass | State |
| 2024-09-18 | AM/NS CALVERT LLC | CALVERT, Mobile, AL | Pass | State |
| 2024-09-18 | MMGK ARKOMA, LLC. - KIBLER COMPRESSOR | KIBLER, Crawford, AR | Pass | State |
| 2024-09-18 | AMERICAN ELECTRIC POWER SERVICE CORPORATION (JOHN W. TURK JR. POWER PLANT) | FULTON, Hempstead, AR | Pass | State |
| 2024-09-18 | MERIT ENERGY COMPANY, LLC - PRICE COMPRESSOR | RUSSELLVILLE, Pope, AR | Pass | State |
| 2024-09-18 | EL PASO NATURAL GAS CO - WILLIAMS COMPRESSOR STATION | WILLIAMS, Coconino, AZ | Pass | State |
| 2024-09-18 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2024-09-18 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2024-09-18 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2024-09-18 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2024-09-18 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2024-09-18 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2024-09-18 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2024-09-18 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2024-09-18 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2024-09-18 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2024-09-18 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2024-09-18 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2024-09-18 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
| 2024-09-18 | SENECA RESOURCES — high-priority violation on file | MCKITTRICK, Kern, CA | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.