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 |
|---|---|---|---|---|
| 2025-04-09 | LEAF RIVER CELLULOSE LLC — high-priority violation on file | NEW AUGUSTA, Perry, MS | Pass | State |
| 2025-04-09 | LEAF RIVER CELLULOSE LLC — high-priority violation on file | NEW AUGUSTA, Perry, MS | Pass | State |
| 2025-04-09 | LEAF RIVER CELLULOSE LLC — high-priority violation on file | NEW AUGUSTA, Perry, MS | Pass | State |
| 2025-04-09 | LEAF RIVER CELLULOSE LLC — high-priority violation on file | NEW AUGUSTA, Perry, MS | Pass | State |
| 2025-04-09 | LEAF RIVER CELLULOSE LLC — high-priority violation on file | NEW AUGUSTA, Perry, MS | Pass | State |
| 2025-04-09 | LEAF RIVER CELLULOSE LLC — high-priority violation on file | NEW AUGUSTA, Perry, MS | Pass | State |
| 2025-04-09 | LEAF RIVER CELLULOSE LLC — high-priority violation on file | NEW AUGUSTA, Perry, MS | Pass | State |
| 2025-04-09 | HOOD INDUSTRIES INC, WIGGINS PLYWOOD PLANT | WIGGINS, Stone, MS | Pass | State |
| 2025-04-09 | HOOD INDUSTRIES INC, WIGGINS PLYWOOD PLANT | WIGGINS, Stone, MS | Pass | State |
| 2025-04-08 | CHEMOURS COMPANY FC LLC THE, DELISLE PLANT | PASS CHRISTI, Harrison, MS | Pass | State |
| 2025-04-08 | CHEMOURS COMPANY FC LLC THE, DELISLE PLANT | PASS CHRISTI, Harrison, MS | Pass | State |
| 2025-04-08 | CHEMOURS COMPANY FC LLC THE, DELISLE PLANT | PASS CHRISTI, Harrison, MS | Pass | State |
| 2025-04-08 | CHEMOURS COMPANY FC LLC THE, DELISLE PLANT | PASS CHRISTI, Harrison, MS | Pass | State |
| 2025-04-08 | CHEMOURS COMPANY FC LLC THE, DELISLE PLANT | PASS CHRISTI, Harrison, MS | Pass | State |
| 2025-04-08 | HOOD INDUSTRIES INC, WIGGINS PLYWOOD PLANT | WIGGINS, Stone, MS | Pass | State |
| 2025-04-08 | HOOD INDUSTRIES INC, WIGGINS PLYWOOD PLANT | WIGGINS, Stone, MS | Pass | State |
| 2025-04-07 | HOOD INDUSTRIES INC, WIGGINS PLYWOOD PLANT | WIGGINS, Stone, MS | Pass | State |
| 2025-04-07 | HOOD INDUSTRIES INC, WIGGINS PLYWOOD PLANT | WIGGINS, Stone, MS | Pass | State |
| 2025-04-03 | LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER | TAYLORSVILLE, Smith, MS | Pass | State |
| 2025-04-02 | SG RESOURCES MISSISSIPPI LLC, SOUTHERN PINES ENERGY CENTER | LEAKESVILLE, Greene, MS | Pass | State |
| 2025-04-02 | SG RESOURCES MISSISSIPPI LLC, SOUTHERN PINES ENERGY CENTER | LEAKESVILLE, Greene, MS | Pass | State |
| 2025-04-02 | SG RESOURCES MISSISSIPPI LLC, SOUTHERN PINES ENERGY CENTER | LEAKESVILLE, Greene, MS | Pass | State |
| 2025-04-02 | SG RESOURCES MISSISSIPPI LLC, SOUTHERN PINES ENERGY CENTER | LEAKESVILLE, Greene, MS | Pass | State |
| 2025-04-02 | SG RESOURCES MISSISSIPPI LLC, SOUTHERN PINES ENERGY CENTER | LEAKESVILLE, Greene, MS | Pass | State |
| 2025-04-02 | SG RESOURCES MISSISSIPPI LLC, SOUTHERN PINES ENERGY CENTER | LEAKESVILLE, Greene, MS | Pass | State |
| 2025-04-02 | LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER | TAYLORSVILLE, Smith, MS | Pass | State |
| 2025-04-02 | LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER | TAYLORSVILLE, Smith, MS | Pass | State |
| 2025-04-02 | LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER | TAYLORSVILLE, Smith, MS | Pass | State |
| 2025-04-02 | LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER | TAYLORSVILLE, Smith, MS | Pass | State |
| 2025-04-02 | LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER | TAYLORSVILLE, Smith, MS | Pass | State |
| 2025-04-01 | VICKSBURG FOREST PRODUCTS LLC, WALTERSVILLE LUMBER MILL — high-priority violation on file | VICKSBURG, Warren, MS | Pass | State |
| 2025-04-01 | VICKSBURG FOREST PRODUCTS LLC, WALTERSVILLE LUMBER MILL — high-priority violation on file | VICKSBURG, Warren, MS | Pass | State |
| 2025-04-01 | VICKSBURG FOREST PRODUCTS LLC, WALTERSVILLE LUMBER MILL — high-priority violation on file | VICKSBURG, Warren, MS | Pass | State |
| 2025-04-01 | VICKSBURG FOREST PRODUCTS LLC, WALTERSVILLE LUMBER MILL — high-priority violation on file | VICKSBURG, Warren, MS | Pass | State |
| 2025-03-27 | SOUTHEAST SUPPLY HEADER LLC, COLLINS BOOSTER STATION | COLLINS, Covington, MS | Pass | State |
| 2025-03-27 | SOUTHEAST SUPPLY HEADER LLC, COLLINS BOOSTER STATION | COLLINS, Covington, MS | Pass | State |
| 2025-03-27 | SOUTHEAST SUPPLY HEADER LLC, COLLINS BOOSTER STATION | COLLINS, Covington, MS | Pass | State |
| 2025-03-26 | SOUTHEAST SUPPLY HEADER LLC, COLLINS BOOSTER STATION | COLLINS, Covington, MS | Pass | State |
| 2025-03-26 | SOUTHEAST SUPPLY HEADER LLC, COLLINS BOOSTER STATION | COLLINS, Covington, MS | Pass | State |
| 2025-03-26 | SOUTHEAST SUPPLY HEADER LLC, COLLINS BOOSTER STATION | COLLINS, Covington, MS | Pass | State |
| 2025-03-26 | MURPHY OIL USA INC, MERIDIAN TERMINAL | MERIDIAN, Lauderdale, MS | Pass | State |
| 2025-03-26 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-03-25 | SOUTHEAST SUPPLY HEADER LLC, DENTVILLE COMPRESSOR STATION | HAZLEHURST, Copiah, MS | Pass | State |
| 2025-03-25 | SOUTHEAST SUPPLY HEADER LLC, DENTVILLE COMPRESSOR STATION | HAZLEHURST, Copiah, MS | Pass | State |
| 2025-03-25 | SOUTHEAST SUPPLY HEADER LLC, DENTVILLE COMPRESSOR STATION | HAZLEHURST, Copiah, MS | Pass | State |
| 2025-03-25 | SOUTHEAST SUPPLY HEADER LLC, DENTVILLE COMPRESSOR STATION | HAZLEHURST, Copiah, MS | Pass | State |
| 2025-03-25 | SOUTHEAST SUPPLY HEADER LLC, DENTVILLE COMPRESSOR STATION | HAZLEHURST, Copiah, MS | Pass | State |
| 2025-03-25 | SOUTHEAST SUPPLY HEADER LLC, DENTVILLE COMPRESSOR STATION | HAZLEHURST, Copiah, MS | Pass | State |
| 2025-03-25 | SOUTHERN NATURAL GAS COMPANY LLC, GWINVILLE COMPRESSOR STATION — high-priority violation on file | NEW HEBRON, Jefferson Davis, MS | Pass | State |
| 2025-03-25 | SOUTHERN NATURAL GAS COMPANY LLC, GWINVILLE COMPRESSOR STATION — high-priority violation on file | NEW HEBRON, Jefferson Davis, MS | Pass | State |
| 2025-03-25 | SOUTHERN NATURAL GAS COMPANY LLC, GWINVILLE COMPRESSOR STATION — high-priority violation on file | NEW HEBRON, Jefferson Davis, MS | Pass | State |
| 2025-03-25 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-03-25 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-03-25 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Fail | State |
| 2025-03-25 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-03-25 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-03-25 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-03-24 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-03-24 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2025-03-24 | GCF US HOLDINGS, LLC - COLUMBUS MILL — high-priority violation on file | COLUMBUS, Lowndes, MS | Pass | State |
| 2025-03-24 | GCF US HOLDINGS, LLC - COLUMBUS MILL — high-priority violation on file | COLUMBUS, Lowndes, MS | Pass | State |
| 2025-03-19 | SOUTHERN NATURAL GAS COMPANY LLC, ENTERPRISE COMPRESSOR STATION | ENTERPRISE, Clarke, MS | Pass | State |
| 2025-03-19 | SOUTHERN NATURAL GAS COMPANY LLC, ENTERPRISE COMPRESSOR STATION | ENTERPRISE, Clarke, MS | Pass | State |
| 2025-03-19 | SOUTHERN NATURAL GAS COMPANY LLC, ENTERPRISE COMPRESSOR STATION | ENTERPRISE, Clarke, MS | Pass | State |
| 2025-03-19 | SOUTHERN NATURAL GAS COMPANY LLC, ENTERPRISE COMPRESSOR STATION | ENTERPRISE, Clarke, MS | Pass | State |
| 2025-03-19 | COOPERATIVE ENERGY, A MISSISSIPPI ELECTRIC COOPERATIVE, MOSELLE GENERATING PLANT | MOSELLE, Jones, MS | Pass | State |
| 2025-03-18 | SOUTHERN NATURAL GAS COMPANY LLC, ENTERPRISE COMPRESSOR STATION | ENTERPRISE, Clarke, MS | Pass | State |
| 2025-03-18 | SOUTHERN NATURAL GAS COMPANY LLC, ENTERPRISE COMPRESSOR STATION | ENTERPRISE, Clarke, MS | Pass | State |
| 2025-03-18 | SOUTHERN NATURAL GAS COMPANY LLC, ENTERPRISE COMPRESSOR STATION | ENTERPRISE, Clarke, MS | Pass | State |
| 2025-03-18 | SOUTHERN NATURAL GAS COMPANY LLC, ENTERPRISE COMPRESSOR STATION | ENTERPRISE, Clarke, MS | Pass | State |
| 2025-03-18 | SOUTHERN NATURAL GAS COMPANY LLC, ENTERPRISE COMPRESSOR STATION | ENTERPRISE, Clarke, MS | Pass | State |
| 2025-03-18 | SOUTHERN NATURAL GAS COMPANY LLC, ENTERPRISE COMPRESSOR STATION | ENTERPRISE, Clarke, MS | Pass | State |
| 2025-03-18 | COOPERATIVE ENERGY, A MISSISSIPPI ELECTRIC COOPERATIVE, MOSELLE GENERATING PLANT | MOSELLE, Jones, MS | Pass | State |
| 2025-03-18 | HUNT SOUTHLAND REFINING COMPANY LLC | HEIDELBERG, Jones, MS | Pass | State |
| 2025-03-18 | CF INDUSTRIES NITROGEN LLC | YAZOO CITY, Yazoo, MS | Pass | State |
| 2025-03-18 | CF INDUSTRIES NITROGEN LLC | YAZOO CITY, Yazoo, MS | Pass | State |
| 2025-03-17 | HUNT SOUTHLAND REFINING COMPANY LLC | HEIDELBERG, Jones, MS | Pass | State |
| 2025-03-17 | CF INDUSTRIES NITROGEN LLC | YAZOO CITY, Yazoo, MS | Pass | State |
| 2025-03-17 | CF INDUSTRIES NITROGEN LLC | YAZOO CITY, Yazoo, MS | Pass | State |
| 2025-03-17 | CF INDUSTRIES NITROGEN LLC | YAZOO CITY, Yazoo, MS | Pass | State |
| 2025-03-17 | CF INDUSTRIES NITROGEN LLC | YAZOO CITY, Yazoo, MS | Pass | State |
| 2025-03-13 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2025-03-13 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2025-03-13 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2025-03-13 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2025-03-12 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2025-03-12 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2025-03-12 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2025-03-12 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2025-03-12 | KOCH FARMS OF MISSISSIPPI LLC | MORTON, Scott, MS | Pass | State |
| 2025-03-12 | KOCH FARMS OF MISSISSIPPI LLC | MORTON, Scott, MS | Pass | State |
| 2025-03-11 | CHOCTAW GENERATION LIMITED PARTNERSHIP, RED HILLS GENERATION FACILITY | ACKERMAN, Choctaw, MS | Pass | State |
| 2025-03-11 | CHOCTAW GENERATION LIMITED PARTNERSHIP, RED HILLS GENERATION FACILITY | ACKERMAN, Choctaw, MS | Pass | State |
| 2025-03-11 | TEXAS EASTERN TRANSMISSION LP, CLINTON COMPRESSOR STATION | JACKSON, Hinds, MS | Pass | State |
| 2025-03-11 | TEXAS EASTERN TRANSMISSION LP, CLINTON COMPRESSOR STATION | JACKSON, Hinds, MS | Pass | State |
| 2025-03-11 | TEXAS EASTERN TRANSMISSION LP, CLINTON COMPRESSOR STATION | JACKSON, Hinds, MS | Pass | State |
| 2025-03-11 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2025-03-11 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2025-03-11 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2025-03-11 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.