EPA Air · stack tests by state and year
Air-emissions stack tests in Michigan, 2025
- 387Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Every stack test below was recorded against a source in Michigan during 2025; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in Michigan, 2025
- Wayne County 72
- St. Clair County 30
- Monroe County 18
- Kent County 18
- Ottawa County 16
- Calhoun County 15
- Macomb County 14
- Washtenaw County 12
- Midland County 11
- Alpena County 11
- Crawford County 10
- Manistee County 10
- Oakland County 10
- Kalamazoo County 9
- Genesee County 8
- Bay County 8
- Delta County 8
- Mason County 6
- Marquette County 6
- Dickinson County 6
- Charlevoix County 6
- Ingham County 6
- Otsego County 5
- Tuscola County 5
- Eaton County 5
- Allegan County 5
- Cass County 4
- Van Buren County 4
- Sanilac County 4
- Huron County 4
- Clare County 4
- Montcalm County 3
- Berrien County 3
- Shiawassee County 3
- Kalkaska County 3
Michigan, other years
Air-emissions stack tests recorded in Michigan, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-12-19 | MARATHON PETROLEUM COMPANY LP — high-priority violation on file | DETROIT, Wayne, MI | Pass | State |
| 2025-12-19 | AMRIZE CEMENT INC. — high-priority violation on file | ALPENA, Alpena, MI | Pass | State |
| 2025-12-19 | GERDAU MACSTEEL MONROE MILL — high-priority violation on file | MONROE, Monroe, MI | Pass | State |
| 2025-12-18 | MARATHON PETROLEUM COMPANY LP — high-priority violation on file | DETROIT, Wayne, MI | Pass | State |
| 2025-12-17 | MARATHON PETROLEUM COMPANY LP — high-priority violation on file | DETROIT, Wayne, MI | Pass | State |
| 2025-12-12 | J. H. CAMPBELL PLANT | WEST OLIVE, Ottawa, MI | Pass | State |
| 2025-12-12 | FCA US LLC - CHRYSLER TECHNOLOGY CENTER | AUBURN HILLS, Oakland, MI | Pass | State |
| 2025-12-11 | GLWA WATER RESOURCE RECOVERY FACILITY | DETROIT, Wayne, MI | Pass | State |
| 2025-12-11 | J. H. CAMPBELL PLANT | WEST OLIVE, Ottawa, MI | Pass | State |
| 2025-12-11 | LANSING BOARD OF WATER & LIGHT - ERICKSON STATION | LANSING, Eaton, MI | Pass | State |
| 2025-12-10 | DETROIT THERMAL BEACON HEATING PLANT | DETROIT, Wayne, MI | Pass | State |
| 2025-12-10 | DTE ELECTRIC COMPANY - MONROE POWER PLANT | MONROE, Monroe, MI | Pass | State |
| 2025-12-10 | J. H. CAMPBELL PLANT | WEST OLIVE, Ottawa, MI | Pass | State |
| 2025-12-10 | YPSILANTI COMMUNITY UTILITIES AUTHORITY | YPSILANTI, Washtenaw, MI | Pass | State |
| 2025-12-10 | YPSILANTI COMMUNITY UTILITIES AUTHORITY | YPSILANTI, Washtenaw, MI | Pass | State |
| 2025-12-10 | LOUISIANA-PACIFIC CORP NEWBERRY PLANT — high-priority violation on file | NEWBERRY, Luce, MI | Pass | State |
| 2025-12-09 | ANR PIPELINE COMPANY LINCOLN COMPRESSOR STATION | LAKE GEORGE, Clare, MI | Pass | State |
| 2025-12-05 | DTE ELECTRIC COMPANY - MONROE POWER PLANT | MONROE, Monroe, MI | Pass | State |
| 2025-12-05 | DTE ELECTRIC COMPANY - MONROE POWER PLANT | MONROE, Monroe, MI | Pass | State |
| 2025-12-05 | J. H. CAMPBELL PLANT | WEST OLIVE, Ottawa, MI | Pass | State |
| 2025-12-05 | CADILLAC RENEWABLE ENERGY FACILITY | CADILLAC, Wexford, MI | Pass | State |
| 2025-12-04 | MICHIGAN SUGAR COMPANY, CROSWELL FACTORY — high-priority violation on file | CROSWELL, Sanilac, MI | Pass | State |
| 2025-12-04 | ARAUCO NORTH AMERICA | GRAYLING, Crawford, MI | Pass | State |
| 2025-12-03 | DTE ELECTRIC COMPANY - MONROE POWER PLANT | MONROE, Monroe, MI | Pass | State |
| 2025-12-03 | MICHIGAN SUGAR COMPANY-CARO FACTORY — high-priority violation on file | CARO, Tuscola, MI | Pass | State |
| 2025-12-02 | DOW SILICONES CORPORATION | MIDLAND, Midland, MI | Pass | State |
| 2025-12-02 | MICHIGAN SUGAR COMPANY - BAY CITY — high-priority violation on file | BAY CITY, Bay, MI | Pass | State |
| 2025-12-02 | QUESTSPECIALTY LLC - MYRTLE | WAYNE, Wayne, MI | Pass | State |
| 2025-12-02 | CANTON RENEWABLES LLC | CANTON, Wayne, MI | Pass | State |
| 2025-11-25 | MARATHON PETROLEUM COMPANY LP — high-priority violation on file | DETROIT, Wayne, MI | Pass | State |
| 2025-11-25 | AMRIZE CEMENT INC. — high-priority violation on file | ALPENA, Alpena, MI | Pass | State |
| 2025-11-21 | TES FILER CITY STATION | FILER CITY, Manistee, MI | Pass | State |
| 2025-11-21 | ARAUCO NORTH AMERICA | GRAYLING, Crawford, MI | Pass | State |
| 2025-11-20 | GRAYLING GENERATING STATION LTD PARTNER | GRAYLING, Crawford, MI | Pass | State |
| 2025-11-20 | CABOT CORPORATION | MIDLAND, Midland, MI | Pass | State |
| 2025-11-19 | DTE ELECTRIC COMPANY - MONROE POWER PLANT | MONROE, Monroe, MI | Pass | State |
| 2025-11-19 | NORTH AMERICAN NATURAL RESOURCES -VENICE PARK 9526 GENERATING STATION | LENNON, Shiawassee, MI | Pass | State |
| 2025-11-18 | ST MARYS CEMENT U.S. LLC, CHARLEVOIX PLANT | CHARLEVOIX, Charlevoix, MI | Pass | State |
| 2025-11-18 | UPPER MICHIGAN ENERGY RESOURCES -F.D. KUESTER G.S. | NEGAUNEE, Marquette, MI | Pass | State |
| 2025-11-17 | AMRIZE CEMENT INC. — high-priority violation on file | ALPENA, Alpena, MI | Pass | State |
| 2025-11-14 | DTE ELECTRIC COMPANY - DEARBORN ENERGY CENTER | DEARBORN, Wayne, MI | Pass | State |
| 2025-11-13 | THE DOW CHEMICAL COMPANY U.S.A., MIDLAND — high-priority violation on file | MIDLAND, Midland, MI | Pass | State |
| 2025-11-13 | FCA US LLC - DETROIT ASSEMBLY COMPLEX — high-priority violation on file | DETROIT, Wayne, MI | Pass | State |
| 2025-11-12 | ST MARYS CEMENT U.S. LLC, CHARLEVOIX PLANT | CHARLEVOIX, Charlevoix, MI | Fail | State |
| 2025-11-12 | KENT COUNTY WASTE TO ENERGY FACILITY | GRAND RAPIDS, Kent, MI | Pass | State |
| 2025-11-11 | ERVIN AMASTEEL DIVISION | ADRIAN, Lenawee, MI | Pass | State |
| 2025-11-07 | DOW SILICONES CORPORATION | MIDLAND, Midland, MI | Pass | State |
| 2025-11-07 | FORD MOTOR COMPANY WAYNE COMPLEX | WAYNE, Wayne, MI | Pass | State |
| 2025-11-06 | GLWA WATER RESOURCE RECOVERY FACILITY | DETROIT, Wayne, MI | Pass | State |
| 2025-11-06 | FCA US LLC - CHRYSLER TECHNOLOGY CENTER | AUBURN HILLS, Oakland, MI | Pass | State |
| 2025-11-05 | INDECK NILES LLC | NILES, Cass, MI | Pass | State |
| 2025-11-05 | ENERGY DEVELOPMENTS BYRON CENTER, LLC | BYRON CENTER, Kent, MI | Pass | State |
| 2025-11-04 | MICHIGAN SUGAR COMPANY, CROSWELL FACTORY — high-priority violation on file | CROSWELL, Sanilac, MI | Pass | State |
| 2025-11-04 | ANR PIPELINE-COLD SPRINGS12 /BLUE LAKE/ COLD SPRINGS 1 | MANCELONA, Kalkaska, MI | Pass | State |
| 2025-11-04 | NYLOK LLC — high-priority violation on file | MACOMB, Macomb, MI | Pass | State |
| 2025-11-04 | POET BIOREFINING - CARO, LLC | CARO, Tuscola, MI | Pass | State |
| 2025-10-30 | WARREN WASTE WATER TREATMENT PLANT | WARREN, Macomb, MI | Pass | State |
| 2025-10-29 | GREAT LAKES GAS TRANSMISSION STATION #13 | OTISVILLE, Genesee, MI | Pass | State |
| 2025-10-28 | AMRIZE CEMENT INC. — high-priority violation on file | ALPENA, Alpena, MI | Pass | State |
| 2025-10-28 | MICHIGAN SUGAR COMPANY-CARO FACTORY — high-priority violation on file | CARO, Tuscola, MI | Pass | State |
| 2025-10-28 | WEYERHAEUSER NR COMPANY | GRAYLING, Crawford, MI | Pass | State |
| 2025-10-28 | WEYERHAEUSER NR COMPANY | GRAYLING, Crawford, MI | Pass | State |
| 2025-10-28 | GREAT LAKES GAS - FARWELL COMPRESSOR STATION 12 | LAKE GEORGE, Clare, MI | Pass | State |
| 2025-10-28 | BREMBO NORTH AMERICA, INC. — high-priority violation on file | HOMER, Calhoun, MI | Pass | State |
| 2025-10-28 | RIVERSIDE CARBON SOLUTIONS - TURTLE LAKE CO2 | CHESTER TWP, Otsego, MI | Pass | State |
| 2025-10-24 | MARATHON PETROLEUM COMPANY LP — high-priority violation on file | DETROIT, Wayne, MI | Pass | State |
| 2025-10-23 | MARATHON PETROLEUM COMPANY LP — high-priority violation on file | DETROIT, Wayne, MI | Pass | State |
| 2025-10-23 | HEMLOCK SEMICONDUCTOR OPERATIONS LLC | HEMLOCK, Saginaw, MI | Pass | State |
| 2025-10-23 | ZEELAND FARM SERVICES, INC. — high-priority violation on file | ZEELAND, Ottawa, MI | Pass | State |
| 2025-10-23 | MARQUETTE BOARD OF LIGHT AND POWER | MARQUETTE, Marquette, MI | Pass | State |
| 2025-10-22 | FORD MOTOR COMPANY - FLAT ROCK ASSEMBLY | FLAT ROCK, Wayne, MI | Pass | State |
| 2025-10-22 | GRAYLING GENERATING STATION LTD PARTNER | GRAYLING, Crawford, MI | Fail | State |
| 2025-10-22 | NORTHERN OAKS RECYCLING AND DISPOSAL FACILITY | HARRISON, Clare, MI | Pass | State |
| 2025-10-22 | ENERGY DEVELOPMENTS MICHIGAN, LLC | MONTROSE, Genesee, MI | Pass | State |
| 2025-10-17 | DEARBORN INDUSTRIAL GENERATION | DEARBORN, Wayne, MI | Pass | State |
| 2025-10-16 | DTE ST. CLAIR / BELLE RIVER POWER PLANT — high-priority violation on file | CHINA, St. Clair, MI | Pass | State |
| 2025-10-16 | KNAUF INSULATION, INC. | ALBION, Calhoun, MI | Pass | State |
| 2025-10-16 | THE ANDERSONS RENEWABLES LLC | ALBION, Calhoun, MI | Pass | State |
| 2025-10-15 | ST MARYS CEMENT U.S. LLC, CHARLEVOIX PLANT | CHARLEVOIX, Charlevoix, MI | Pass | State |
| 2025-10-15 | PHARMACIA & UPJOHN CO LLC, A SUBSIDIARY OF PFIZER | KALAMAZOO, Kalamazoo, MI | Pass | State |
| 2025-10-15 | THE ANDERSONS RENEWABLES LLC | ALBION, Calhoun, MI | Pass | State |
| 2025-10-15 | UNIVERSITY OF MICHIGAN | ANN ARBOR, Washtenaw, MI | Pass | State |
| 2025-10-15 | EAGLE VALLEY LANDFILL | LAKE ORION, Oakland, MI | Pass | State |
| 2025-10-14 | GRAYLING GENERATING STATION LTD PARTNER | GRAYLING, Crawford, MI | Pass | State |
| 2025-10-14 | HYUNDAI AMERICA TECHNICAL CENTER INC. (HATCI) | YPSILANTI, Washtenaw, MI | Pass | State |
| 2025-10-09 | ZFS ITHACA, LLC — high-priority violation on file | ITHACA, Gratiot, MI | Fail | State |
| 2025-10-08 | GREDE IRON MOUNTAIN, LLC — high-priority violation on file | KINGSFORD, Dickinson, MI | Pass | State |
| 2025-10-08 | WEYERHAEUSER NR COMPANY | GRAYLING, Crawford, MI | Pass | State |
| 2025-10-08 | MPLX TERMINALS LLC - NORTH MUSKEGON TERMINAL | MUSKEGON, Muskegon, MI | Pass | State |
| 2025-10-07 | DTE ST. CLAIR / BELLE RIVER POWER PLANT — high-priority violation on file | CHINA, St. Clair, MI | Pass | State |
| 2025-10-07 | UNIVERSITY OF MICHIGAN | ANN ARBOR, Washtenaw, MI | Pass | State |
| 2025-10-02 | J. H. CAMPBELL PLANT | WEST OLIVE, Ottawa, MI | Pass | State |
| 2025-10-02 | DTE GAS COMPANY - BELLE RIVER MILLS COMPRESSOR STATION | CHINA, St. Clair, MI | Pass | State |
| 2025-10-02 | LACKS INDUSTRIES INC — high-priority violation on file | GRAND RAPIDS, Kent, MI | Pass | State |
| 2025-10-02 | UPPER MICHIGAN ENERGY RESOURCES -F.D. KUESTER G.S. | NEGAUNEE, Marquette, MI | Pass | State |
| 2025-10-01 | AMRIZE CEMENT INC. — high-priority violation on file | ALPENA, Alpena, MI | Pass | State |
| 2025-09-30 | GRAND RAPIDS WASTEWATER TREATMENT PLANT | GRAND RAPIDS, Kent, MI | Pass | State |
| 2025-09-30 | J. H. CAMPBELL PLANT | WEST OLIVE, Ottawa, MI | Pass | State |
| 2025-09-30 | DTE ELECTRIC COMPANY - GREENWOOD ENERGY CENTER | KENOCKEE, St. Clair, MI | Pass | State |
| 2025-09-30 | DTE GAS COMPANY - MILFORD COMPRESSOR STATION | MILFORD, Oakland, MI | Pass | State |
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Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.