EPA Air · stack tests by state and year
Air-emissions stack tests in Mississippi, 2025
- 688Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Every stack test below was recorded against a source in Mississippi during 2025; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in Mississippi, 2025
- Madison County 67
- Lowndes County 58
- Hinds County 55
- Jackson County 47
- Monroe County 47
- Lawrence County 41
- Perry County 26
- Lee County 25
- Smith County 25
- Harrison County 20
- Wayne County 20
- Choctaw County 19
- Jones County 19
- Simpson County 18
- Yazoo County 17
- Warren County 15
- Grenada County 14
- DeSoto County 13
- Noxubee County 12
- Covington County 11
- Panola County 11
- Forrest County 11
- Stone County 10
- Clarke County 10
- Jasper County 8
- Jefferson Davis County 7
- Copiah County 6
- George County 6
- Greene County 6
- Lamar County 5
- Alcorn County 4
- Humphreys County 4
- Washington County 4
- Scott County 4
- Kemper County 4
- Union County 4
- Hancock County 3
- Marshall County 3
- Walthall County 3
- Pontotoc County 3
- Lauderdale County 3
Mississippi, other years
Air-emissions stack tests recorded in Mississippi, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-09-10 | MISSISSIPPI POWER COMPANY, DAVID M RATCLIFFE | DEKALB, Kemper, MS | Pass | State |
| 2025-09-10 | MISSISSIPPI POWER COMPANY, DAVID M RATCLIFFE | DEKALB, Kemper, MS | Pass | State |
| 2025-09-10 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-10 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-10 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-10 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-10 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-10 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-10 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-10 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-10 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-10 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-10 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-10 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-10 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-10 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-10 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-10 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-10 | HOOD INDUSTRIES INC, WAYNESBORO | WAYNESBORO, Wayne, MS | Pass | State |
| 2025-09-10 | HOOD INDUSTRIES INC, WAYNESBORO | WAYNESBORO, Wayne, MS | Pass | State |
| 2025-09-09 | GULF SOUTH PIPELINE COMPANY LLC, PETAL COMPRESSOR STATION | PETAL, Forrest, MS | Pass | State |
| 2025-09-09 | GULF SOUTH PIPELINE COMPANY LLC, PETAL COMPRESSOR STATION | PETAL, Forrest, MS | Pass | State |
| 2025-09-09 | GULF SOUTH PIPELINE COMPANY LLC, PETAL COMPRESSOR STATION | PETAL, Forrest, MS | Pass | State |
| 2025-09-09 | GULF SOUTH PIPELINE COMPANY LLC, PETAL COMPRESSOR STATION | PETAL, Forrest, MS | Pass | State |
| 2025-09-09 | GULF SOUTH PIPELINE COMPANY LLC, PETAL COMPRESSOR STATION | PETAL, Forrest, MS | Pass | State |
| 2025-09-09 | GULF SOUTH PIPELINE COMPANY LLC, PETAL COMPRESSOR STATION | PETAL, Forrest, MS | Pass | State |
| 2025-09-09 | GULF SOUTH PIPELINE COMPANY LLC, PETAL COMPRESSOR STATION | PETAL, Forrest, MS | Pass | State |
| 2025-09-09 | GULF SOUTH PIPELINE COMPANY LLC, PETAL COMPRESSOR STATION | PETAL, Forrest, MS | Pass | State |
| 2025-09-09 | GULF SOUTH PIPELINE COMPANY LLC, PETAL COMPRESSOR STATION | PETAL, Forrest, MS | Pass | State |
| 2025-09-09 | MISSISSIPPI POWER COMPANY, DAVID M RATCLIFFE | DEKALB, Kemper, MS | Pass | State |
| 2025-09-09 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-09 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-09 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-09 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-09 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-09 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-09 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-09 | WESTLAKE CHEMICALS AND VINYLS LLC | ABERDEEN, Monroe, MS | Pass | State |
| 2025-09-04 | TRANSCONTINENTAL GAS PIPE LINE COMPANY LLC, STATION 77 | SEMINARY, Covington, MS | Pass | State |
| 2025-09-04 | TRANSCONTINENTAL GAS PIPE LINE COMPANY LLC, STATION 77 | SEMINARY, Covington, MS | Pass | State |
| 2025-09-04 | TRANSCONTINENTAL GAS PIPE LINE COMPANY LLC, STATION 77 | SEMINARY, Covington, MS | Pass | State |
| 2025-09-04 | TRANSCONTINENTAL GAS PIPE LINE COMPANY LLC, STATION 77 | SEMINARY, Covington, MS | Pass | State |
| 2025-09-03 | TRANSCONTINENTAL GAS PIPE LINE COMPANY LLC, COMPRESSOR STATION 80 | HEIDELBERG, Jones, MS | Pass | State |
| 2025-09-03 | TRANSCONTINENTAL GAS PIPE LINE COMPANY LLC, COMPRESSOR STATION 80 | HEIDELBERG, Jones, MS | Pass | State |
| 2025-09-03 | TRANSCONTINENTAL GAS PIPE LINE COMPANY LLC, COMPRESSOR STATION 80 | HEIDELBERG, Jones, MS | Pass | State |
| 2025-09-02 | CANTON MUNICIPAL UTILITIES — high-priority violation on file | CANTON, Madison, MS | Pass | State |
| 2025-09-02 | CANTON MUNICIPAL UTILITIES — high-priority violation on file | CANTON, Madison, MS | Pass | State |
| 2025-09-02 | GREENLEAF CO2 SOLUTIONS LLC, WEST YELLOW CREEK COMPRESSOR STATION — high-priority violation on file | WAYNESBORO, Wayne, MS | Pass | State |
| 2025-09-02 | GREENLEAF CO2 SOLUTIONS LLC, WEST YELLOW CREEK COMPRESSOR STATION — high-priority violation on file | WAYNESBORO, Wayne, MS | Pass | State |
| 2025-09-02 | GREENLEAF CO2 SOLUTIONS LLC, WEST YELLOW CREEK COMPRESSOR STATION — high-priority violation on file | WAYNESBORO, Wayne, MS | Pass | State |
| 2025-08-28 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2025-08-28 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2025-08-28 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2025-08-28 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2025-08-28 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2025-08-28 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2025-08-28 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2025-08-28 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2025-08-22 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-08-22 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-08-22 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-08-22 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-08-22 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-08-22 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-08-22 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-08-20 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-08-19 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-08-13 | ERGON REFINING INC — high-priority violation on file | VICKSBURG, Warren, MS | Pass | State |
| 2025-08-11 | ERGON REFINING INC — high-priority violation on file | VICKSBURG, Warren, MS | Pass | State |
| 2025-08-08 | SOUTHERN NATURAL GAS COMPANY LLC, GWINVILLE COMPRESSOR STATION — high-priority violation on file | NEW HEBRON, Jefferson Davis, MS | Pass | State |
| 2025-08-08 | SOUTHERN NATURAL GAS COMPANY LLC, GWINVILLE COMPRESSOR STATION — high-priority violation on file | NEW HEBRON, Jefferson Davis, MS | Pass | State |
| 2025-08-07 | HANKINS LUMBER COMPANY INC, ELLIOTT — high-priority violation on file | ELLIOTT, Grenada, MS | Fail | State |
| 2025-08-06 | HANKINS LUMBER COMPANY INC, ELLIOTT — high-priority violation on file | ELLIOTT, Grenada, MS | Fail | State |
| 2025-08-06 | SOUTHERN NATURAL GAS COMPANY LLC, GWINVILLE COMPRESSOR STATION — high-priority violation on file | NEW HEBRON, Jefferson Davis, MS | Fail | State |
| 2025-08-06 | SOUTHERN NATURAL GAS COMPANY LLC, GWINVILLE COMPRESSOR STATION — high-priority violation on file | NEW HEBRON, Jefferson Davis, MS | Pass | State |
| 2025-08-05 | TENNESSEE GAS PIPELINE COMPANY LLC, HEIDELBERG COMPRESSOR STATION NUMBER 538 | HEIDELBERG, Jasper, MS | Pass | State |
| 2025-08-05 | TENNESSEE GAS PIPELINE COMPANY LLC, HEIDELBERG COMPRESSOR STATION NUMBER 538 | HEIDELBERG, Jasper, MS | Pass | State |
| 2025-08-05 | COOPERATIVE ENERGY, A MISSISSIPPI ELECTRIC COOPERATIVE, MOSELLE GENERATING PLANT | MOSELLE, Jones, MS | Pass | State |
| 2025-07-30 | MONROE GAS STORAGE COMPANY LLC, MONROE GAS STORAGE PROJECT | AMORY, Monroe, MS | Pass | State |
| 2025-07-30 | MONROE GAS STORAGE COMPANY LLC, MONROE GAS STORAGE PROJECT | AMORY, Monroe, MS | Pass | State |
| 2025-07-30 | MONROE GAS STORAGE COMPANY LLC, MONROE GAS STORAGE PROJECT | AMORY, Monroe, MS | Pass | State |
| 2025-07-29 | MISSISSIPPI POWER COMPANY, PLANT VICTOR J DANIEL | MOSS POINT, Jackson, MS | Pass | State |
| 2025-07-29 | MISSISSIPPI POWER COMPANY, PLANT VICTOR J DANIEL | MOSS POINT, Jackson, MS | Pass | State |
| 2025-07-29 | MONROE GAS STORAGE COMPANY LLC, MONROE GAS STORAGE PROJECT | AMORY, Monroe, MS | Pass | State |
| 2025-07-29 | MONROE GAS STORAGE COMPANY LLC, MONROE GAS STORAGE PROJECT | AMORY, Monroe, MS | Pass | State |
| 2025-07-29 | MONROE GAS STORAGE COMPANY LLC, MONROE GAS STORAGE PROJECT | AMORY, Monroe, MS | Pass | State |
| 2025-07-29 | MONROE GAS STORAGE COMPANY LLC, MONROE GAS STORAGE PROJECT | AMORY, Monroe, MS | Pass | State |
| 2025-07-29 | MONROE GAS STORAGE COMPANY LLC, MONROE GAS STORAGE PROJECT | AMORY, Monroe, MS | Pass | State |
| 2025-07-29 | MONROE GAS STORAGE COMPANY LLC, MONROE GAS STORAGE PROJECT | AMORY, Monroe, MS | Pass | State |
| 2025-07-23 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2025-07-21 | GCF US HOLDINGS, LLC - COLUMBUS MILL — high-priority violation on file | COLUMBUS, Lowndes, MS | Pass | State |
| 2025-07-16 | MASONITE CORPORATION — high-priority violation on file | LAUREL, Jones, MS | Pass | State |
| 2025-07-16 | SUNSHINE MILLS INC — high-priority violation on file | TUPELO, Lee, MS | Pass | State |
| 2025-07-10 | SUNSHINE MILLS INC — high-priority violation on file | TUPELO, Lee, MS | Pass | State |
| 2025-07-09 | SUNSHINE MILLS INC — high-priority violation on file | TUPELO, Lee, MS | Pass | State |
| 2025-07-09 | SUNSHINE MILLS INC — high-priority violation on file | TUPELO, Lee, MS | Pass | State |
| 2025-07-09 | SUNSHINE MILLS INC — high-priority violation on file | TUPELO, Lee, MS | Pass | State |
| 2025-07-09 | SUNSHINE MILLS INC — high-priority violation on file | TUPELO, Lee, MS | Pass | State |
| 2025-07-09 | SUNSHINE MILLS INC — high-priority violation on file | TUPELO, Lee, MS | Pass | State |
| 2025-07-08 | SUNSHINE MILLS INC — high-priority violation on file | TUPELO, Lee, MS | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.