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 |
|---|---|---|---|---|
| 2025-03-11 | KOCH FARMS OF MISSISSIPPI LLC | MORTON, Scott, MS | Pass | State |
| 2025-03-11 | KOCH FARMS OF MISSISSIPPI LLC | MORTON, Scott, MS | Pass | State |
| 2025-03-10 | TEXAS EASTERN TRANSMISSION LP, CLINTON COMPRESSOR STATION | JACKSON, Hinds, MS | Pass | State |
| 2025-03-10 | TEXAS EASTERN TRANSMISSION LP, CLINTON COMPRESSOR STATION | JACKSON, Hinds, MS | Pass | State |
| 2025-03-10 | TEXAS EASTERN TRANSMISSION LP, CLINTON COMPRESSOR STATION | JACKSON, Hinds, MS | Pass | State |
| 2025-03-10 | TEXAS EASTERN TRANSMISSION LP, CLINTON COMPRESSOR STATION | JACKSON, Hinds, MS | Pass | State |
| 2025-03-06 | GREENLEAF CO2 SOLUTIONS LLC, WEST YELLOW CREEK COMPRESSOR STATION — high-priority violation on file | WAYNESBORO, Wayne, MS | Pass | State |
| 2025-03-06 | GREENLEAF CO2 SOLUTIONS LLC, WEST YELLOW CREEK COMPRESSOR STATION — high-priority violation on file | WAYNESBORO, Wayne, MS | Pass | State |
| 2025-03-06 | GREENLEAF CO2 SOLUTIONS LLC, WEST YELLOW CREEK COMPRESSOR STATION — high-priority violation on file | WAYNESBORO, Wayne, MS | Pass | State |
| 2025-03-06 | GREENLEAF CO2 SOLUTIONS LLC, WEST YELLOW CREEK COMPRESSOR STATION — high-priority violation on file | WAYNESBORO, Wayne, MS | Pass | State |
| 2025-03-06 | GREENLEAF CO2 SOLUTIONS LLC, WEST YELLOW CREEK COMPRESSOR STATION — high-priority violation on file | WAYNESBORO, Wayne, MS | Pass | State |
| 2025-03-06 | GREENLEAF CO2 SOLUTIONS LLC, WEST YELLOW CREEK COMPRESSOR STATION — high-priority violation on file | WAYNESBORO, Wayne, MS | Pass | State |
| 2025-03-04 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2025-03-04 | CHEVRON USA INC, CHEVRON PRODUCTS COMPANY, PASCAGOULA REFINERY | PASCAGOULA, Jackson, MS | Pass | State |
| 2025-02-27 | TELLUS OPERATING GROUP LLC, BAXTERVILLE COMPRESSOR STATION | LUMBERTON, Lamar, MS | Pass | State |
| 2025-02-27 | TELLUS OPERATING GROUP LLC, BAXTERVILLE COMPRESSOR STATION | LUMBERTON, Lamar, MS | Pass | State |
| 2025-02-27 | TELLUS OPERATING GROUP LLC, BAXTERVILLE COMPRESSOR STATION | LUMBERTON, Lamar, MS | Pass | State |
| 2025-02-20 | VENTURE OIL AND GAS INC, HIWANNEE OPERATIONS — high-priority violation on file | WAYNESBORO, Wayne, MS | Pass | State |
| 2025-02-20 | VENTURE OIL AND GAS INC, HIWANNEE OPERATIONS — high-priority violation on file | WAYNESBORO, Wayne, MS | Pass | State |
| 2025-02-20 | VENTURE OIL AND GAS INC, HIWANNEE OPERATIONS — high-priority violation on file | WAYNESBORO, Wayne, MS | Pass | State |
| 2025-02-19 | MISSISSIPPI POWER COMPANY, PLANT JACK WATSON | GULFPORT, Harrison, MS | Pass | State |
| 2025-02-19 | MISSISSIPPI POWER COMPANY, PLANT JACK WATSON | GULFPORT, Harrison, MS | Pass | State |
| 2025-02-18 | MISSISSIPPI POWER COMPANY, PLANT JACK WATSON | GULFPORT, Harrison, MS | Pass | State |
| 2025-02-18 | MISSISSIPPI POWER COMPANY, PLANT JACK WATSON | GULFPORT, Harrison, MS | Pass | State |
| 2025-02-17 | CHEMOURS COMPANY FC LLC THE, DELISLE PLANT | PASS CHRISTI, Harrison, MS | Pass | State |
| 2025-02-13 | TEXAS GAS TRANSMISSION LLC, LAKE CORMORANT COMPRESSOR STATION | LAKE CORMORA, DeSoto, MS | Pass | State |
| 2025-02-12 | TEXAS GAS TRANSMISSION LLC, GREENVILLE COMPRESSOR STATION | GREENVILLE, Washington, MS | Pass | State |
| 2025-01-29 | MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION | EDWARDS, Hinds, MS | Pass | State |
| 2025-01-29 | MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION | EDWARDS, Hinds, MS | Pass | State |
| 2025-01-29 | MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION | EDWARDS, Hinds, MS | Pass | State |
| 2025-01-29 | MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION | EDWARDS, Hinds, MS | Pass | State |
| 2025-01-29 | MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION | EDWARDS, Hinds, MS | Pass | State |
| 2025-01-29 | MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION | EDWARDS, Hinds, MS | Pass | State |
| 2025-01-29 | LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER | TAYLORSVILLE, Smith, MS | Pass | State |
| 2025-01-29 | LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER | TAYLORSVILLE, Smith, MS | Pass | State |
| 2025-01-29 | LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER | TAYLORSVILLE, Smith, MS | Pass | State |
| 2025-01-29 | LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER | TAYLORSVILLE, Smith, MS | Pass | State |
| 2025-01-28 | ARDAGH METAL PACKAGING USA CORP | OLIVE BRANCH, DeSoto, MS | Pass | State |
| 2025-01-28 | ARDAGH METAL PACKAGING USA CORP | OLIVE BRANCH, DeSoto, MS | Pass | State |
| 2025-01-28 | ARDAGH METAL PACKAGING USA CORP | OLIVE BRANCH, DeSoto, MS | Pass | State |
| 2025-01-28 | ARDAGH METAL PACKAGING USA CORP | OLIVE BRANCH, DeSoto, MS | Pass | State |
| 2025-01-28 | ARDAGH METAL PACKAGING USA CORP | OLIVE BRANCH, DeSoto, MS | Pass | State |
| 2025-01-28 | ARDAGH METAL PACKAGING USA CORP | OLIVE BRANCH, DeSoto, MS | Pass | State |
| 2025-01-28 | ARDAGH METAL PACKAGING USA CORP | OLIVE BRANCH, DeSoto, MS | Pass | State |
| 2025-01-28 | ARDAGH METAL PACKAGING USA CORP | OLIVE BRANCH, DeSoto, MS | Pass | State |
| 2025-01-28 | ARDAGH METAL PACKAGING USA CORP | OLIVE BRANCH, DeSoto, MS | Pass | State |
| 2025-01-28 | ARDAGH METAL PACKAGING USA CORP | OLIVE BRANCH, DeSoto, MS | Pass | State |
| 2025-01-28 | ARDAGH METAL PACKAGING USA CORP | OLIVE BRANCH, DeSoto, MS | Pass | State |
| 2025-01-28 | ARDAGH METAL PACKAGING USA CORP | OLIVE BRANCH, DeSoto, MS | Pass | State |
| 2025-01-28 | MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION | EDWARDS, Hinds, MS | Pass | State |
| 2025-01-28 | MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION | EDWARDS, Hinds, MS | Pass | State |
| 2025-01-28 | MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION | EDWARDS, Hinds, MS | Pass | State |
| 2025-01-28 | MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION | EDWARDS, Hinds, MS | Pass | State |
| 2025-01-28 | MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION | EDWARDS, Hinds, MS | Pass | State |
| 2025-01-28 | MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION | EDWARDS, Hinds, MS | Pass | State |
| 2025-01-28 | LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER | TAYLORSVILLE, Smith, MS | Pass | State |
| 2025-01-28 | LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER | TAYLORSVILLE, Smith, MS | Pass | State |
| 2025-01-28 | LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER | TAYLORSVILLE, Smith, MS | Pass | State |
| 2025-01-28 | LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER | TAYLORSVILLE, Smith, MS | Pass | State |
| 2025-01-23 | CF INDUSTRIES NITROGEN LLC | YAZOO CITY, Yazoo, MS | Pass | State |
| 2025-01-23 | CF INDUSTRIES NITROGEN LLC | YAZOO CITY, Yazoo, MS | Pass | State |
| 2025-01-22 | SOUTHERN NATURAL GAS COMPANY LLC, BAY SPRINGS COMPRESSOR STATION | BAY SPRINGS, Jasper, MS | Pass | State |
| 2025-01-22 | MURPHY OIL USA INC, MERIDIAN TERMINAL | MERIDIAN, Lauderdale, MS | Pass | State |
| 2025-01-22 | MURPHY OIL USA INC, MERIDIAN TERMINAL | MERIDIAN, Lauderdale, MS | Pass | State |
| 2025-01-22 | CF INDUSTRIES NITROGEN LLC | YAZOO CITY, Yazoo, MS | Pass | State |
| 2025-01-22 | CF INDUSTRIES NITROGEN LLC | YAZOO CITY, Yazoo, MS | Pass | State |
| 2025-01-22 | CF INDUSTRIES NITROGEN LLC | YAZOO CITY, Yazoo, MS | Pass | State |
| 2025-01-21 | SOUTHERN NATURAL GAS COMPANY LLC, BAY SPRINGS COMPRESSOR STATION | BAY SPRINGS, Jasper, MS | Pass | State |
| 2025-01-21 | SOUTHERN NATURAL GAS COMPANY LLC, BAY SPRINGS COMPRESSOR STATION | BAY SPRINGS, Jasper, MS | Pass | State |
| 2025-01-17 | GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION | HARRISVILLE, Simpson, MS | Pass | State |
| 2025-01-17 | GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION | HARRISVILLE, Simpson, MS | Pass | State |
| 2025-01-17 | GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION | HARRISVILLE, Simpson, MS | Pass | State |
| 2025-01-17 | GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION | HARRISVILLE, Simpson, MS | Pass | State |
| 2025-01-17 | GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION | HARRISVILLE, Simpson, MS | Pass | State |
| 2025-01-17 | GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION | HARRISVILLE, Simpson, MS | Pass | State |
| 2025-01-17 | GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION | HARRISVILLE, Simpson, MS | Pass | State |
| 2025-01-17 | GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION | HARRISVILLE, Simpson, MS | Pass | State |
| 2025-01-16 | GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION | HARRISVILLE, Simpson, MS | Pass | State |
| 2025-01-16 | GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION | HARRISVILLE, Simpson, MS | Pass | State |
| 2025-01-16 | GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION | HARRISVILLE, Simpson, MS | Pass | State |
| 2025-01-16 | GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION | HARRISVILLE, Simpson, MS | Pass | State |
| 2025-01-16 | GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION | HARRISVILLE, Simpson, MS | Pass | State |
| 2025-01-16 | GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION | HARRISVILLE, Simpson, MS | Pass | State |
| 2025-01-16 | GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION | HARRISVILLE, Simpson, MS | Pass | State |
| 2025-01-16 | GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION | HARRISVILLE, Simpson, MS | Pass | State |
| 2025-01-08 | CF INDUSTRIES NITROGEN LLC | YAZOO CITY, Yazoo, MS | Pass | State |
| 2025-01-07 | CF INDUSTRIES NITROGEN LLC | YAZOO CITY, Yazoo, MS | Pass | State |
| 2025-01-06 | CF INDUSTRIES NITROGEN LLC | YAZOO CITY, Yazoo, MS | Pass | State |
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Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.