EPA Air · stack tests by county and year

Air-emissions stack tests in Hamilton County, Ohio, 2026

47Stack 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 Hamilton County, Ohio 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 Hamilton County facility page.

Hamilton County, Ohio, 2026

Air-emissions stack tests in Hamilton County, other years

Air-emissions stack tests recorded in Hamilton County, Ohio, 2026

Date	Facility	Kind	Agency
2026-08-03	GM CEREALS PROPERTIES, INC.	Pass	State
2026-08-03	GM CEREALS PROPERTIES, INC.	Pass	State
2026-07-29	MILL CREEK WWTP	Pass	State
2026-07-21	MILL CREEK WWTP	Pass	State
2026-07-09	MIAMI FORT POWER COMPANY LLC	Pass	State
2026-07-09	MIAMI FORT POWER COMPANY LLC	Pass	State
2026-07-07	MIAMI FORT POWER COMPANY LLC	Pass	State
2026-06-29	UNIVERSITY OF CINCINNATI	Pass	State
2026-06-29	UNIVERSITY OF CINCINNATI	Pass	State
2026-06-29	UNIVERSITY OF CINCINNATI	Pass	State
2026-06-28	GE AEROSPACE EVENDALE PLANT	Pass	State
2026-06-28	GE AEROSPACE EVENDALE PLANT	Pass	State
2026-06-28	GE AEROSPACE EVENDALE PLANT	Pass	State
2026-06-28	GE AEROSPACE EVENDALE PLANT	Pass	State
2026-06-28	GE AEROSPACE EVENDALE PLANT	Pass	State
2026-06-28	GE AEROSPACE EVENDALE PLANT	Pass	State
2026-06-28	GE AEROSPACE EVENDALE PLANT	Pass	State
2026-06-28	GE AEROSPACE EVENDALE PLANT	Pass	State
2026-06-28	GE AEROSPACE EVENDALE PLANT	Pass	State
2026-06-28	GE AEROSPACE EVENDALE PLANT	Pass	State
2026-06-28	GE AEROSPACE EVENDALE PLANT	Pass	State
2026-06-28	GE AEROSPACE EVENDALE PLANT	Pass	State
2026-06-25	GE AEROSPACE EVENDALE PLANT	Pass	State
2026-06-25	GE AEROSPACE EVENDALE PLANT	Pass	State
2026-06-25	GE AEROSPACE EVENDALE PLANT	Pass	State
2026-06-25	GE AEROSPACE EVENDALE PLANT	Pass	State
2026-06-25	GE AEROSPACE EVENDALE PLANT	Pass	State
2026-06-25	GE AEROSPACE EVENDALE PLANT	Pass	State
2026-06-25	GE AEROSPACE EVENDALE PLANT	Pass	State
2026-06-25	GE AEROSPACE EVENDALE PLANT	Pass	State
2026-05-29	MIAMI FORT POWER COMPANY LLC	Pass	State
2026-05-28	MIAMI FORT POWER COMPANY LLC	Pass	State
2026-05-28	MIAMI FORT POWER COMPANY LLC	Pass	State
2026-04-30	GE AEROSPACE EVENDALE PLANT	Pass	State
2026-04-07	DTE ST. BERNARD, LLC	Pass	State
2026-04-07	DTE ST. BERNARD, LLC	Pass	State
2026-02-26	TRAMMO NITROGEN PRODUCTS, INC.	Pass	State
2026-02-05	MIAMI FORT POWER COMPANY LLC	Pass	State
2026-01-07	MILL CREEK WWTP	Pass	State
2026-01-07	MILL CREEK WWTP	Pass	State
2026-01-07	MILL CREEK WWTP	Pass	State
2026-01-07	MILL CREEK WWTP	Pass	State
2026-01-07	MILL CREEK WWTP	Pass	State
2026-01-07	MILL CREEK WWTP	Pass	State
2026-01-07	MILL CREEK WWTP	Pass	State
2026-01-07	MILL CREEK WWTP	Pass	State
2026-01-07	MILL CREEK WWTP	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 Hamilton county, OH, for 2026. It lists 21 stack tests recorded in 2026.