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.

What this page shows

This page covers Clean Air Act facilities in the EPA air register with stack tests in Ellis county, TX, for 2026. It lists 27 stack tests recorded in 2026.