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

Mississippi, other years

Air-emissions stack tests recorded in Mississippi, 2026

Date	Facility	Where	Kind	Agency
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
2026-02-10	COOPERATIVE ENERGY, A MISSISSIPPI ELECTRIC COOPERATIVE, MOSELLE GENERATING PLANT	MOSELLE, Jones, MS	Pass	State
2026-02-10	COOPERATIVE ENERGY, A MISSISSIPPI ELECTRIC COOPERATIVE, MOSELLE GENERATING PLANT	MOSELLE, Jones, MS	Pass	State
2026-02-10	TELLUS OPERATING GROUP LLC, RALEIGH CO2 PLANT	RALEIGH, Smith, MS	Pass	State
2026-02-02	TELLUS OPERATING GROUP LLC, BAXTERVILLE COMPRESSOR STATION	LUMBERTON, Lamar, MS	Pass	State
2026-02-02	TELLUS OPERATING GROUP LLC, BAXTERVILLE COMPRESSOR STATION	LUMBERTON, Lamar, MS	Pass	State
2026-02-02	TELLUS OPERATING GROUP LLC, BAXTERVILLE COMPRESSOR STATION	LUMBERTON, Lamar, MS	Pass	State
2026-01-27	HOOD INDUSTRIES INC, BEAUMONT	BEAUMONT, Perry, MS	Pass	State
2026-01-27	HOOD INDUSTRIES INC, BEAUMONT	BEAUMONT, Perry, MS	Pass	State
2026-01-27	HOOD INDUSTRIES INC, BEAUMONT	BEAUMONT, Perry, MS	Pass	State
2026-01-27	HOOD INDUSTRIES INC, BEAUMONT	BEAUMONT, Perry, MS	Pass	State
2026-01-27	HOOD INDUSTRIES INC, BEAUMONT	BEAUMONT, Perry, MS	Pass	State
2026-01-16	NATIONAL AERONAUTICS AND SPACE ADMINISTRATION, JOHN C STENNIS SPACE CENTER	STENNIS SPAC, Hancock, MS	Pass	State
2026-01-16	NATIONAL AERONAUTICS AND SPACE ADMINISTRATION, JOHN C STENNIS SPACE CENTER	STENNIS SPAC, Hancock, MS	Pass	State
2026-01-15	NATIONAL AERONAUTICS AND SPACE ADMINISTRATION, JOHN C STENNIS SPACE CENTER	STENNIS SPAC, Hancock, MS	Pass	State
2026-01-15	NATIONAL AERONAUTICS AND SPACE ADMINISTRATION, JOHN C STENNIS SPACE CENTER	STENNIS SPAC, Hancock, MS	Pass	State
2026-01-15	NATIONAL AERONAUTICS AND SPACE ADMINISTRATION, JOHN C STENNIS SPACE CENTER	STENNIS SPAC, Hancock, MS	Pass	State
2026-01-15	LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER	TAYLORSVILLE, Smith, MS	Pass	State
2026-01-15	LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER	TAYLORSVILLE, Smith, MS	Pass	State
2026-01-15	LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER	TAYLORSVILLE, Smith, MS	Pass	State
2026-01-15	LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER	TAYLORSVILLE, Smith, MS	Pass	State
2026-01-14	NATIONAL AERONAUTICS AND SPACE ADMINISTRATION, JOHN C STENNIS SPACE CENTER	STENNIS SPAC, Hancock, MS	Pass	State
2026-01-14	NATIONAL AERONAUTICS AND SPACE ADMINISTRATION, JOHN C STENNIS SPACE CENTER	STENNIS SPAC, Hancock, MS	Pass	State
2026-01-14	NATIONAL AERONAUTICS AND SPACE ADMINISTRATION, JOHN C STENNIS SPACE CENTER	STENNIS SPAC, Hancock, MS	Pass	State
2026-01-14	MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION	EDWARDS, Hinds, MS	Pass	State
2026-01-14	MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION	EDWARDS, Hinds, MS	Pass	State
2026-01-14	MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION	EDWARDS, Hinds, MS	Pass	State
2026-01-14	MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION	EDWARDS, Hinds, MS	Pass	State
2026-01-14	MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION	EDWARDS, Hinds, MS	Pass	State
2026-01-14	MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION	EDWARDS, Hinds, MS	Pass	State
2026-01-14	MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION	EDWARDS, Hinds, MS	Pass	State
2026-01-14	MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION	EDWARDS, Hinds, MS	Pass	State
2026-01-14	MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION	EDWARDS, Hinds, MS	Pass	State
2026-01-14	GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION	HARRISVILLE, Simpson, MS	Pass	State
2026-01-14	GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION	HARRISVILLE, Simpson, MS	Pass	State
2026-01-14	GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION	HARRISVILLE, Simpson, MS	Pass	State
2026-01-14	GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION	HARRISVILLE, Simpson, MS	Pass	State
2026-01-14	GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION	HARRISVILLE, Simpson, MS	Pass	State
2026-01-14	GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION	HARRISVILLE, Simpson, MS	Pass	State
2026-01-14	GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION	HARRISVILLE, Simpson, MS	Pass	State
2026-01-14	GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION	HARRISVILLE, Simpson, MS	Pass	State
2026-01-14	LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER	TAYLORSVILLE, Smith, MS	Pass	State
2026-01-14	LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER	TAYLORSVILLE, Smith, MS	Pass	State
2026-01-14	LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER	TAYLORSVILLE, Smith, MS	Pass	State
2026-01-14	LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER	TAYLORSVILLE, Smith, MS	Pass	State
2026-01-13	NATIONAL AERONAUTICS AND SPACE ADMINISTRATION, JOHN C STENNIS SPACE CENTER	STENNIS SPAC, Hancock, MS	Pass	State
2026-01-13	NATIONAL AERONAUTICS AND SPACE ADMINISTRATION, JOHN C STENNIS SPACE CENTER	STENNIS SPAC, Hancock, MS	Pass	State
2026-01-13	MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION	EDWARDS, Hinds, MS	Pass	State
2026-01-13	MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION	EDWARDS, Hinds, MS	Pass	State
2026-01-13	MIDCONTINENT EXPRESS PIPELINE LLC, MEP 4 VICKSBURG COMPRESSOR STATION	EDWARDS, Hinds, MS	Pass	State
2026-01-13	GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION	HARRISVILLE, Simpson, MS	Pass	State
2026-01-13	GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION	HARRISVILLE, Simpson, MS	Pass	State
2026-01-13	GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION	HARRISVILLE, Simpson, MS	Pass	State
2026-01-13	GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION	HARRISVILLE, Simpson, MS	Pass	State
2026-01-13	GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION	HARRISVILLE, Simpson, MS	Pass	State
2026-01-13	GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION	HARRISVILLE, Simpson, MS	Pass	State
2026-01-13	GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION	HARRISVILLE, Simpson, MS	Pass	State
2026-01-13	GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION	HARRISVILLE, Simpson, MS	Pass	State
2026-01-13	LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER	TAYLORSVILLE, Smith, MS	Pass	State
2026-01-13	LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER	TAYLORSVILLE, Smith, MS	Pass	State
2026-01-13	LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER	TAYLORSVILLE, Smith, MS	Pass	State
2026-01-13	LEAF RIVER ENERGY CENTER LLC, LEAF RIVER ENERGY CENTER	TAYLORSVILLE, Smith, MS	Pass	State

Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.