EPA Air · stack tests by county and year

Air-emissions stack tests in St. Clair County, Michigan, 2026

23Stack 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 St. Clair County, Michigan 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 St. Clair County facility page.

St. Clair County, Michigan, 2026

Air-emissions stack tests in St. Clair County, other years

Air-emissions stack tests recorded in St. Clair County, Michigan, 2026

Date	Facility	Kind	Agency
2026-07-23	DTE ST. CLAIR / BELLE RIVER POWER PLANT — high-priority violation on file	Pass	State
2026-07-16	CONSUMERS ENERGY - ST. CLAIR COMPRESSOR STATION	Pass	State
2026-07-15	CONSUMERS ENERGY - ST. CLAIR COMPRESSOR STATION	Pass	State
2026-06-29	DTE ST. CLAIR / BELLE RIVER POWER PLANT — high-priority violation on file	Pass	State
2026-06-25	DTE ST. CLAIR / BELLE RIVER POWER PLANT — high-priority violation on file	Pass	State
2026-06-24	DTE GAS COMPANY - BELLE RIVER MILLS COMPRESSOR STATION	Pass	State
2026-06-17	DTE GAS COMPANY - COLUMBUS COMPRESSOR STATION — high-priority violation on file	Pass	State
2026-06-04	DTE ST. CLAIR / BELLE RIVER POWER PLANT — high-priority violation on file	Pass	State
2026-05-28	DTE ST. CLAIR / BELLE RIVER POWER PLANT — high-priority violation on file	Pass	State
2026-05-13	DTE ST. CLAIR / BELLE RIVER POWER PLANT — high-priority violation on file	Pass	State
2026-05-13	DTE ST. CLAIR / BELLE RIVER POWER PLANT — high-priority violation on file	Pass	State
2026-05-13	DTE ELECTRIC COMPANY - GREENWOOD ENERGY CENTER	Pass	State
2026-05-07	DTE ST. CLAIR / BELLE RIVER POWER PLANT — high-priority violation on file	Pass	State
2026-04-24	DTE ST. CLAIR / BELLE RIVER POWER PLANT — high-priority violation on file	Fail	State
2026-04-24	BLUE WATER RENEWABLES — high-priority violation on file	Pass	State
2026-04-14	DTE ST. CLAIR / BELLE RIVER POWER PLANT — high-priority violation on file	Pass	State
2026-04-14	SEMCO ENERGY GAS COMPANY - MORTON WELLS FACILITY	Pass	State
2026-03-20	DTE GAS COMPANY - BELLE RIVER MILLS COMPRESSOR STATION	Pass	State
2026-03-18	CONSUMERS ENERGY - ST. CLAIR COMPRESSOR STATION	Pass	State
2026-03-11	DTE ST. CLAIR / BELLE RIVER POWER PLANT — high-priority violation on file	Pass	State
2026-03-05	DTE GAS COMPANY - BELLE RIVER MILLS COMPRESSOR STATION	Pass	State
2026-02-12	MARYSVILLE ETHANOL, LLC	Pass	State
2026-02-05	DTE GAS COMPANY - BELLE RIVER MILLS COMPRESSOR STATION	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 St. Clair county, MI, for 2026. It lists 23 stack tests recorded in 2026.