EPA Air · stack tests by county and year

Air-emissions stack tests in Dakota County, Minnesota, 2025

33Stack 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 Dakota County, Minnesota during 2025. 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 Dakota County facility page.

Dakota County, Minnesota, 2025

Air-emissions stack tests in Dakota County, other years

Air-emissions stack tests recorded in Dakota County, Minnesota, 2025

Date	Facility	Kind	Agency
2025-12-18	FLINT HILLS RESOURCES PINE BEND REFINERY	Pass	State
2025-12-16	NORTHERN NATURAL GAS - FARMINGTON	Pass	State
2025-12-09	FLINT HILLS RESOURCES PINE BEND REFINERY	Pass	State
2025-12-02	GOPHER RESOURCE LLC	Pass	State
2025-11-18	CEMSTONE NONMETALLIC	Pass	State
2025-10-30	AMRIZE MIDWEST INC - NONMETALLIC	Pass	State
2025-10-29	FLINT HILLS RESOURCES PINE BEND REFINERY	Pass	State
2025-10-29	AMRIZE MIDWEST INC - NONMETALLIC	Pass	State
2025-10-28	FLINT HILLS RESOURCES PINE BEND REFINERY	Pass	State
2025-10-21	FLINT HILLS RESOURCES PINE BEND REFINERY	Pass	State
2025-10-14	EGA SPECTRO ALLOYS	Pass	State
2025-10-01	MET COUNCIL - SENECA WWTP	Pass	State
2025-09-30	MCNAMARA CONTRACTING INC	Pass	State
2025-08-29	FLINT HILLS RESOURCES PINE BEND REFINERY	Pass	State
2025-08-14	GOPHER RESOURCE LLC	Pass	State
2025-08-12	GOPHER RESOURCE LLC	Pass	State
2025-08-12	COMMERCIAL ASPHALT CO - PLANT 902	Pass	State
2025-08-12	LAKEVILLE - KELLY PIT	Pass	State
2025-08-12	DAKOTA AGGREGATES - UMORE PARK FACILITY	Pass	State
2025-08-04	AMRIZE MIDWEST INC - NONMETALLIC	Pass	State
2025-06-25	FLINT HILLS RESOURCES PINE BEND REFINERY	N/A	State
2025-06-24	FLINT HILLS RESOURCES PINE BEND REFINERY	N/A	State
2025-06-19	ARDENT MILLS LLC HASTINGS, MN	Pass	State
2025-06-10	FLINT HILLS RESOURCES PINE BEND REFINERY	Pass	State
2025-05-27	FLINT HILLS RESOURCES PINE BEND REFINERY	Pass	State
2025-05-23	FLINT HILLS RESOURCES PINE BEND REFINERY	N/A	State
2025-04-08	GOPHER RESOURCE LLC	Pass	State
2025-03-24	FLINT HILLS RESOURCES PINE BEND REFINERY	Pass	State
2025-03-20	FLINT HILLS RESOURCES PINE BEND REFINERY	Pass	State
2025-03-19	FLINT HILLS RESOURCES PINE BEND REFINERY	Pass	State
2025-02-13	FLINT HILLS RESOURCES PINE BEND REFINERY	Pass	State
2025-01-08	MET COUNCIL - SENECA WWTP	Pass	State
2025-01-08	MET COUNCIL - SENECA 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 Dakota county, MN, for 2025. It lists 33 stack tests recorded in 2025.