EPA Air · stack tests by county and year

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

28Stack 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 Mahoning 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 Mahoning County facility page.

Mahoning County, Ohio, 2026

Air-emissions stack tests in Mahoning County, other years

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

Date	Facility	Kind	Agency
2026-07-14	TRIVIUM ALUMINUM PACKAGING USA CORPORATION	Pass	State
2026-07-14	TRIVIUM ALUMINUM PACKAGING USA CORPORATION	Pass	State
2026-06-24	TRIVIUM ALUMINUM PACKAGING USA CORPORATION	Pass	State
2026-05-07	EOG RESOURCES, INC - WEHR SPRING VALLEY FARM MH ELS PAD	Pass	State
2026-05-07	EOG RESOURCES, INC - WEHR SPRING VALLEY FARM MH ELS PAD	Pass	State
2026-05-07	EOG RESOURCES, INC - WEHR SPRING VALLEY FARM MH ELS PAD	Pass	State
2026-04-28	HILCORP ENERGY - POLAND-CLL PRODUCTION FACILITY	Pass	State
2026-04-28	HILCORP ENERGY - POLAND-CLL PRODUCTION FACILITY	Pass	State
2026-04-28	HILCORP ENERGY - POLAND-CLL PRODUCTION FACILITY	Pass	State
2026-04-07	CLEVELAND STEEL CONTAINER CORPORATION	Pass	State
2026-02-21	MAHONING LANDFILL, INC.	Pass	State
2026-02-21	MAHONING LANDFILL, INC.	Pass	State
2026-02-21	MAHONING LANDFILL, INC.	Pass	State
2026-02-21	MAHONING LANDFILL, INC.	Pass	State
2026-02-21	MAHONING LANDFILL, INC.	Pass	State
2026-02-21	MAHONING LANDFILL, INC.	Pass	State
2026-02-21	MAHONING LANDFILL, INC.	Pass	State
2026-02-21	MAHONING LANDFILL, INC.	Pass	State
2026-02-21	MAHONING LANDFILL, INC.	Pass	State
2026-02-21	MAHONING LANDFILL, INC.	Pass	State
2026-02-21	MAHONING LANDFILL, INC.	Pass	State
2026-02-21	MAHONING LANDFILL, INC.	Pass	State
2026-02-21	MAHONING LANDFILL, INC.	Pass	State
2026-02-21	MAHONING LANDFILL, INC.	Pass	State
2026-02-21	MAHONING LANDFILL, INC.	Pass	State
2026-01-23	BAIRD BROTHERS SAWMILL INC — high-priority violation on file	Pass	State
2026-01-23	BAIRD BROTHERS SAWMILL INC — high-priority violation on file	Pass	State
2026-01-23	BAIRD BROTHERS SAWMILL INC — high-priority violation on file	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 Mahoning county, OH, for 2026. Stack tests recorded in 2026: 28.