EPA Air · stack tests by state and year
Air-emissions stack tests in Mississippi, 2026
- 263Stack 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 2026; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in Mississippi, 2026
- Lowndes County 34
- Hancock County 34
- Simpson County 28
- Smith County 25
- Perry County 18
- Hinds County 16
- Jackson County 16
- Wayne County 15
- Greene County 12
- Tippah County 11
- Monroe County 10
- Harrison County 10
- Lawrence County 8
- Quitman County 4
- Lauderdale County 3
- Jones County 3
- Covington County 3
- Walthall County 3
- Jasper County 3
- Lamar County 3
Mississippi, other years
Air-emissions stack tests recorded in Mississippi, 2026
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2026-03-24 | AC POLYMERS INC | BYHALIA, Marshall, MS | Pass | State |
| 2026-03-19 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2026-03-19 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2026-03-19 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-03-19 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-03-19 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-03-19 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-03-17 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2026-03-17 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2026-03-17 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Fail | State |
| 2026-03-17 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Fail | State |
| 2026-03-17 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-03-17 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Fail | State |
| 2026-03-13 | GULF SOUTH PIPELINE COMPANY LLC, MOSS POINT COMPRESSOR STATION | MOSS POINT, Jackson, MS | Pass | State |
| 2026-03-13 | GULF SOUTH PIPELINE COMPANY LLC, MOSS POINT COMPRESSOR STATION | MOSS POINT, Jackson, MS | Pass | State |
| 2026-03-13 | GULF SOUTH PIPELINE COMPANY LLC, MOSS POINT COMPRESSOR STATION | MOSS POINT, Jackson, MS | Pass | State |
| 2026-03-12 | GULF SOUTH PIPELINE COMPANY LLC, HEIDELBERG COMPRESSOR STATION | HEIDELBERG, Jasper, MS | Pass | State |
| 2026-03-12 | GULF SOUTH PIPELINE COMPANY LLC, HEIDELBERG COMPRESSOR STATION | HEIDELBERG, Jasper, MS | Pass | State |
| 2026-03-12 | GULF SOUTH PIPELINE COMPANY LLC, HEIDELBERG COMPRESSOR STATION | HEIDELBERG, Jasper, MS | Pass | State |
| 2026-03-12 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-03-12 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-03-11 | GCF US HOLDINGS, LLC - COLUMBUS MILL — high-priority violation on file | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-03-10 | TEXAS EASTERN TRANSMISSION LP, CLINTON COMPRESSOR STATION | JACKSON, Hinds, MS | Pass | State |
| 2026-03-09 | TEXAS EASTERN TRANSMISSION LP, CLINTON COMPRESSOR STATION | JACKSON, Hinds, MS | Pass | State |
| 2026-03-09 | TEXAS EASTERN TRANSMISSION LP, CLINTON COMPRESSOR STATION | JACKSON, Hinds, MS | Pass | State |
| 2026-03-09 | TEXAS EASTERN TRANSMISSION LP, CLINTON COMPRESSOR STATION | JACKSON, Hinds, MS | Pass | State |
| 2026-03-06 | SG RESOURCES MISSISSIPPI LLC, SOUTHERN PINES ENERGY CENTER | LEAKESVILLE, Greene, MS | Pass | State |
| 2026-03-06 | SG RESOURCES MISSISSIPPI LLC, SOUTHERN PINES ENERGY CENTER | LEAKESVILLE, Greene, MS | Pass | State |
| 2026-03-06 | SG RESOURCES MISSISSIPPI LLC, SOUTHERN PINES ENERGY CENTER | LEAKESVILLE, Greene, MS | Pass | State |
| 2026-03-06 | SG RESOURCES MISSISSIPPI LLC, SOUTHERN PINES ENERGY CENTER | LEAKESVILLE, Greene, MS | Pass | State |
| 2026-03-06 | SG RESOURCES MISSISSIPPI LLC, SOUTHERN PINES ENERGY CENTER | LEAKESVILLE, Greene, MS | Pass | State |
| 2026-03-06 | SG RESOURCES MISSISSIPPI LLC, SOUTHERN PINES ENERGY CENTER | LEAKESVILLE, Greene, MS | Pass | State |
| 2026-03-05 | SG RESOURCES MISSISSIPPI LLC, SOUTHERN PINES ENERGY CENTER | LEAKESVILLE, Greene, MS | Pass | State |
| 2026-03-05 | SG RESOURCES MISSISSIPPI LLC, SOUTHERN PINES ENERGY CENTER | LEAKESVILLE, Greene, MS | Pass | State |
| 2026-03-05 | SG RESOURCES MISSISSIPPI LLC, SOUTHERN PINES ENERGY CENTER | LEAKESVILLE, Greene, MS | Pass | State |
| 2026-03-05 | SG RESOURCES MISSISSIPPI LLC, SOUTHERN PINES ENERGY CENTER | LEAKESVILLE, Greene, MS | Pass | State |
| 2026-03-05 | SG RESOURCES MISSISSIPPI LLC, SOUTHERN PINES ENERGY CENTER | LEAKESVILLE, Greene, MS | Pass | State |
| 2026-03-05 | SG RESOURCES MISSISSIPPI LLC, SOUTHERN PINES ENERGY CENTER | LEAKESVILLE, Greene, MS | Pass | State |
| 2026-03-05 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-03-05 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-03-05 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-03-05 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-03-05 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-03-05 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-03-05 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-03-05 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-02-26 | ALPEK POLYESTER MISSISSIPPI INC — high-priority violation on file | BAY ST. LOUI, Hancock, MS | Pass | State |
| 2026-02-26 | ALPEK POLYESTER MISSISSIPPI INC — high-priority violation on file | BAY ST. LOUI, Hancock, MS | Pass | State |
| 2026-02-25 | ALPEK POLYESTER MISSISSIPPI INC — high-priority violation on file | BAY ST. LOUI, Hancock, MS | Pass | State |
| 2026-02-25 | ALPEK POLYESTER MISSISSIPPI INC — high-priority violation on file | BAY ST. LOUI, Hancock, MS | Pass | State |
| 2026-02-25 | TRANSCONTINENTAL GAS PIPE LINE COMPANY LLC, COMPRESSOR STATION 80 | HEIDELBERG, Jones, MS | Pass | State |
| 2026-02-25 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2026-02-24 | ALPEK POLYESTER MISSISSIPPI INC — high-priority violation on file | BAY ST. LOUI, Hancock, MS | Pass | State |
| 2026-02-24 | ALPEK POLYESTER MISSISSIPPI INC — high-priority violation on file | BAY ST. LOUI, Hancock, MS | Pass | State |
| 2026-02-24 | ALPEK POLYESTER MISSISSIPPI INC — high-priority violation on file | BAY ST. LOUI, Hancock, MS | Pass | State |
| 2026-02-24 | ALPEK POLYESTER MISSISSIPPI INC — high-priority violation on file | BAY ST. LOUI, Hancock, MS | Pass | State |
| 2026-02-24 | GEORGIA PACIFIC MONTICELLO LLC | MONTICELLO, Lawrence, MS | Pass | State |
| 2026-02-24 | BLUE MOUNTAIN PRODUCTION COMPANY, TAYLOR AND PLANT PROPERTY MINE | BLUE MOUNTAI, Tippah, MS | Pass | State |
| 2026-02-24 | BLUE MOUNTAIN PRODUCTION COMPANY, TAYLOR AND PLANT PROPERTY MINE | BLUE MOUNTAI, Tippah, MS | Pass | State |
| 2026-02-24 | BLUE MOUNTAIN PRODUCTION COMPANY, TAYLOR AND PLANT PROPERTY MINE | BLUE MOUNTAI, Tippah, MS | Pass | State |
| 2026-02-24 | BLUE MOUNTAIN PRODUCTION COMPANY, TAYLOR AND PLANT PROPERTY MINE | BLUE MOUNTAI, Tippah, MS | Pass | State |
| 2026-02-24 | BLUE MOUNTAIN PRODUCTION COMPANY, TAYLOR AND PLANT PROPERTY MINE | BLUE MOUNTAI, Tippah, MS | Pass | State |
| 2026-02-24 | BLUE MOUNTAIN PRODUCTION COMPANY, TAYLOR AND PLANT PROPERTY MINE | BLUE MOUNTAI, Tippah, MS | Pass | State |
| 2026-02-24 | BLUE MOUNTAIN PRODUCTION COMPANY, TAYLOR AND PLANT PROPERTY MINE | BLUE MOUNTAI, Tippah, MS | Pass | State |
| 2026-02-24 | BLUE MOUNTAIN PRODUCTION COMPANY, TAYLOR AND PLANT PROPERTY MINE | BLUE MOUNTAI, Tippah, MS | Pass | State |
| 2026-02-24 | BLUE MOUNTAIN PRODUCTION COMPANY, TAYLOR AND PLANT PROPERTY MINE | BLUE MOUNTAI, Tippah, MS | Pass | State |
| 2026-02-24 | BLUE MOUNTAIN PRODUCTION COMPANY, TAYLOR AND PLANT PROPERTY MINE | BLUE MOUNTAI, Tippah, MS | Pass | State |
| 2026-02-24 | BLUE MOUNTAIN PRODUCTION COMPANY, TAYLOR AND PLANT PROPERTY MINE | BLUE MOUNTAI, Tippah, MS | Pass | State |
| 2026-02-24 | TRANSCONTINENTAL GAS PIPELINE COMPANY LLC, STATION 70 | TYLERTOWN, Walthall, MS | Pass | State |
| 2026-02-24 | TRANSCONTINENTAL GAS PIPELINE COMPANY LLC, STATION 70 | TYLERTOWN, Walthall, MS | Pass | State |
| 2026-02-24 | TRANSCONTINENTAL GAS PIPELINE COMPANY LLC, STATION 70 | TYLERTOWN, Walthall, MS | Pass | State |
| 2026-02-23 | ALPEK POLYESTER MISSISSIPPI INC — high-priority violation on file | BAY ST. LOUI, Hancock, MS | Pass | State |
| 2026-02-23 | ALPEK POLYESTER MISSISSIPPI INC — high-priority violation on file | BAY ST. LOUI, Hancock, MS | Pass | State |
| 2026-02-18 | ALPEK POLYESTER MISSISSIPPI INC — high-priority violation on file | BAY ST. LOUI, Hancock, MS | Pass | State |
| 2026-02-18 | ALPEK POLYESTER MISSISSIPPI INC — high-priority violation on file | BAY ST. LOUI, Hancock, MS | Pass | State |
| 2026-02-17 | ALPEK POLYESTER MISSISSIPPI INC — high-priority violation on file | BAY ST. LOUI, Hancock, MS | Pass | State |
| 2026-02-17 | ALPEK POLYESTER MISSISSIPPI INC — high-priority violation on file | BAY ST. LOUI, Hancock, MS | Pass | State |
| 2026-02-17 | NUCOR STEEL JACKSON INC | FLOWOOD, Rankin, MS | Pass | State |
| 2026-02-17 | NUCOR STEEL JACKSON INC | FLOWOOD, Rankin, MS | Pass | State |
| 2026-02-16 | ALPEK POLYESTER MISSISSIPPI INC — high-priority violation on file | BAY ST. LOUI, Hancock, MS | Pass | State |
| 2026-02-16 | ALPEK POLYESTER MISSISSIPPI INC — high-priority violation on file | BAY ST. LOUI, Hancock, MS | Pass | State |
| 2026-02-13 | TEXAS GAS TRANSMISSION LLC, LAKE CORMORANT COMPRESSOR STATION | LAKE CORMORA, DeSoto, MS | Pass | State |
| 2026-02-13 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-02-13 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-02-13 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-02-13 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-02-13 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-02-13 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-02-13 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-02-13 | ALUMINUM DYNAMICS, LLC | COLUMBUS, Lowndes, MS | Pass | State |
| 2026-02-12 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2026-02-12 | LEAF RIVER CELLULOSE LLC — high-priority violation on file | NEW AUGUSTA, Perry, MS | Pass | State |
| 2026-02-12 | LEAF RIVER CELLULOSE LLC — high-priority violation on file | NEW AUGUSTA, Perry, MS | Pass | State |
| 2026-02-12 | LEAF RIVER CELLULOSE LLC — high-priority violation on file | NEW AUGUSTA, Perry, MS | Pass | State |
| 2026-02-12 | LEAF RIVER CELLULOSE LLC — high-priority violation on file | NEW AUGUSTA, Perry, MS | Pass | State |
| 2026-02-12 | LEAF RIVER CELLULOSE LLC — high-priority violation on file | NEW AUGUSTA, Perry, MS | Pass | State |
| 2026-02-12 | GREENLEAF CO2 SOLUTIONS LLC, WEST YELLOW CREEK COMPRESSOR STATION — high-priority violation on file | WAYNESBORO, Wayne, MS | Pass | State |
| 2026-02-12 | GREENLEAF CO2 SOLUTIONS LLC, WEST YELLOW CREEK COMPRESSOR STATION — high-priority violation on file | WAYNESBORO, Wayne, MS | Pass | State |
| 2026-02-12 | GREENLEAF CO2 SOLUTIONS LLC, WEST YELLOW CREEK COMPRESSOR STATION — high-priority violation on file | WAYNESBORO, Wayne, MS | Pass | State |
| 2026-02-12 | GREENLEAF CO2 SOLUTIONS LLC, WEST YELLOW CREEK COMPRESSOR STATION — high-priority violation on file | WAYNESBORO, Wayne, MS | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.