EPA Air · stack tests by county and year

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

17Stack 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 Marion 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 Marion County facility page.

Marion County, Ohio, 2026

Air-emissions stack tests in Marion County, other years

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

Date	Facility	Kind	Agency
2026-01-16	POET BIOREFINING - MARION, LLC	Pass	State
2026-01-16	POET BIOREFINING - MARION, LLC	Pass	State
2026-01-16	POET BIOREFINING - MARION, LLC	Pass	State
2026-01-16	POET BIOREFINING - MARION, LLC	Pass	State
2026-01-15	POET BIOREFINING - MARION, LLC	Pass	State
2026-01-15	POET BIOREFINING - MARION, LLC	Pass	State
2026-01-14	POET BIOREFINING - MARION, LLC	Pass	State
2026-01-14	POET BIOREFINING - MARION, LLC	Pass	State
2026-01-14	POET BIOREFINING - MARION, LLC	Pass	State
2026-01-14	POET BIOREFINING - MARION, LLC	Pass	State
2026-01-14	POET BIOREFINING - MARION, LLC	Pass	State
2026-01-13	POET BIOREFINING - MARION, LLC	Pass	State
2026-01-13	POET BIOREFINING - MARION, LLC	Pass	State
2026-01-13	POET BIOREFINING - MARION, LLC	Pass	State
2026-01-13	POET BIOREFINING - MARION, LLC	Pass	State
2026-01-13	POET BIOREFINING - MARION, LLC	Pass	State
2026-01-13	POET BIOREFINING - MARION, LLC	Pass	State

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