EPA Air · stack tests by county and year

Air-emissions stack tests in Ellis County, Texas, 2026

27Stack tests

A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row below is one stack test recorded against a source in Ellis County, Texas during 2026. A facility can appear several times: this is the year’s record of what happened, not a list of places. The sources themselves are on the Ellis County facility page.

Ellis County, Texas, 2026

Air-emissions stack tests in Ellis County, other years

Air-emissions stack tests recorded in Ellis County, Texas, 2026

Date	Facility	Kind	Agency
2026-08-18	HOWARD COMPRESSOR STATION	Pass	State
2026-07-31	OWENS CORNING INSULATING SYSTEMS WAXAHACHIE PLANT	Pass	State
2026-07-31	OWENS CORNING INSULATING SYSTEMS WAXAHACHIE PLANT	Pass	State
2026-07-31	OWENS CORNING INSULATING SYSTEMS WAXAHACHIE PLANT	Pass	State
2026-07-31	OWENS CORNING INSULATING SYSTEMS WAXAHACHIE PLANT	Pass	State
2026-07-29	PRAXIS ENNIS FACILITY	Pass	State
2026-07-29	PRAXIS ENNIS FACILITY	Pass	State
2026-07-28	ENNIS POWER	Pass	State
2026-07-09	ASH GROVE CEMENT	Pass	State
2026-06-26	MIDLOTHIAN FACILITY	N/A	State
2026-06-24	OWENS CORNING INSULATING SYSTEMS WAXAHACHIE PLANT	Pass	State
2026-06-24	OWENS CORNING INSULATING SYSTEMS WAXAHACHIE PLANT	Pass	State
2026-06-09	OWENS CORNING INSULATING SYSTEMS WAXAHACHIE PLANT	Pass	State
2026-06-09	OWENS CORNING INSULATING SYSTEMS WAXAHACHIE PLANT	Pass	State
2026-06-09	OWENS CORNING INSULATING SYSTEMS WAXAHACHIE PLANT	Pass	State
2026-06-09	GERDAU MIDLOTHIAN PLANT	Pass	State
2026-06-09	GERDAU MIDLOTHIAN PLANT	Pass	State
2026-06-09	GERDAU MIDLOTHIAN PLANT	Pass	State
2026-06-05	ASH GROVE CEMENT	Pass	State
2026-06-05	ASH GROVE CEMENT	Pass	State
2026-04-09	OWENS CORNING INSULATING SYSTEMS WAXAHACHIE PLANT	Fail	State
2026-04-09	OWENS CORNING INSULATING SYSTEMS WAXAHACHIE PLANT	Fail	State
2026-02-11	HOLCIM TEXAS	Pass	State
2026-02-11	HOLCIM TEXAS	Pass	State
2026-01-22	ASH GROVE CEMENT	Pass	State
2026-01-22	OWENS CORNING INSULATING SYSTEMS WAXAHACHIE PLANT	Pass	State
2026-01-22	MIDLOTHIAN ENERGY FACILITY	Pass	State

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