EPA Air · stack tests by state and year

Air-emissions stack tests in Missouri, 2026

326Stack 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 Missouri 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 Missouri, 2026

Missouri, other years

Air-emissions stack tests recorded in Missouri, 2026

Date	Facility	Where	Kind	Agency
2026-02-05	GENERAL MOTORS LLC	WENTZVILLE, St. Charles, MO	N/A	State
2026-02-05	GENERAL MOTORS LLC	WENTZVILLE, St. Charles, MO	N/A	State
2026-01-24	ENERSYS, INC. — high-priority violation on file	WARRENSBURG, Johnson, MO	Pass	State
2026-01-24	ENERSYS, INC. — high-priority violation on file	WARRENSBURG, Johnson, MO	Pass	State
2026-01-23	CLARIOS, LLC	SAINT JOSEPH, Buchanan, MO	Pass	State
2026-01-23	CLARIOS, LLC	SAINT JOSEPH, Buchanan, MO	Pass	State
2026-01-23	CLARIOS, LLC	SAINT JOSEPH, Buchanan, MO	Pass	State
2026-01-23	CLARIOS, LLC	SAINT JOSEPH, Buchanan, MO	Fail	State
2026-01-23	CLARIOS, LLC	SAINT JOSEPH, Buchanan, MO	Pass	State
2026-01-23	CLARIOS, LLC	SAINT JOSEPH, Buchanan, MO	Pass	State
2026-01-23	CLARIOS, LLC	SAINT JOSEPH, Buchanan, MO	Pass	State
2026-01-23	CLARIOS, LLC	SAINT JOSEPH, Buchanan, MO	Fail	State
2026-01-23	CLARIOS, LLC	SAINT JOSEPH, Buchanan, MO	Pass	State
2026-01-23	CLARIOS, LLC	SAINT JOSEPH, Buchanan, MO	Fail	State
2026-01-15	AMEREN MISSOURI- PENO CREEK ENERGY CENTER	BOWLING GREEN, Pike, MO	Pass	State
2026-01-15	AMEREN MISSOURI- PENO CREEK ENERGY CENTER	BOWLING GREEN, Pike, MO	Pass	State
2026-01-13	AUDUBON MATERIALS, LLC - SUGAR CREEK PLANT	SUGAR CREEK, Jackson, MO	Pass	State
2026-01-13	AUDUBON MATERIALS, LLC - SUGAR CREEK PLANT	SUGAR CREEK, Jackson, MO	Pass	State
2026-01-13	AUDUBON MATERIALS, LLC - SUGAR CREEK PLANT	SUGAR CREEK, Jackson, MO	Pass	State
2026-01-12	BASF AGRICULTURAL SOLUTIONS US LLC	PALMYRA, Marion, MO	Pass	State
2026-01-08	SOUTHWEST CLEAN WATER PLANT SPRINGFIELD	SPRINGFIELD, Greene, MO	Pass	State
2026-01-08	SOUTHWEST CLEAN WATER PLANT SPRINGFIELD	SPRINGFIELD, Greene, MO	Pass	State
2026-01-08	SOUTHWEST CLEAN WATER PLANT SPRINGFIELD	SPRINGFIELD, Greene, MO	Pass	State
2026-01-08	SOUTHWEST CLEAN WATER PLANT SPRINGFIELD	SPRINGFIELD, Greene, MO	Pass	State
2026-01-08	SOUTHWEST CLEAN WATER PLANT SPRINGFIELD	SPRINGFIELD, Greene, MO	Pending	State
2026-01-05	CENTERPOINT ENERGY JANE COMPRESSOR STATION	NOEL, McDonald, MO	Pass	State

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