EPA Air · stack tests by state and year
Air-emissions stack tests in Minnesota, 2025
- 238Stack 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 Minnesota 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 Minnesota, 2025
- Dakota County 33
- St. Louis County 19
- Washington County 12
- Hennepin County 12
- Scott County 11
- Ramsey County 11
- Carlton County 10
- Clay County 8
- Le Sueur County 6
- Polk County 6
- Sibley County 5
- Lyon County 5
- Sherburne County 5
- McLeod County 5
- Lake County 4
- Itasca County 4
- Koochiching County 4
- Goodhue County 4
- Dodge County 4
- Kandiyohi County 3
- Blue Earth County 3
- Jackson County 3
- Martin County 3
- Benton County 3
- Stearns County 3
- Olmsted County 3
Minnesota, other years
Air-emissions stack tests recorded in Minnesota, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-12-18 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2025-12-17 | NORTHERN NATURAL GAS CO - NORTH BRANCH | HARRIS, Chisago, MN | Pass | State |
| 2025-12-16 | NORTHERN NATURAL GAS - FARMINGTON | FARMINGTON, Dakota, MN | Pass | State |
| 2025-12-15 | HEARTLAND CORN PRODUCTS | WINTHROP, Sibley, MN | Pass | State |
| 2025-12-12 | AL-CORN CLEAN FUEL LLC | CLAREMONT, Dodge, MN | Pass | State |
| 2025-12-11 | ABBOTT NORTHWESTERN HOSPITAL | MINNEAPOLIS, Hennepin, MN | Pass | State |
| 2025-12-09 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2025-12-09 | SILGAN CONTAINERS MFG CORP | SAVAGE, Scott, MN | Pass | State |
| 2025-12-05 | XCEL ENERGY - ALLEN S KING GENERATING PLANT | BAYPORT, Washington, MN | Pass | State |
| 2025-12-04 | ABBOTT NORTHWESTERN HOSPITAL | MINNEAPOLIS, Hennepin, MN | Pass | State |
| 2025-12-02 | SAPPI CLOQUET LLC | CLOQUET, Carlton, MN | Pass | State |
| 2025-12-02 | GOPHER RESOURCE LLC | EAGAN, Dakota, MN | Pass | State |
| 2025-12-02 | LOUISIANA-PACIFIC CORP - TWO HARBORS | TWO HARBORS, Lake, MN | Pass | State |
| 2025-12-02 | AMERICAN CRYSTAL SUGAR - CROOKSTON | CROOKSTON, Polk, MN | Pass | State |
| 2025-12-02 | MET COUNCIL METROPOLITAN WATER RESOURCE RECOVERY FACILITY | SAINT PAUL, Ramsey, MN | Pass | State |
| 2025-12-02 | XCEL ENERGY - ALLEN S KING GENERATING PLANT | BAYPORT, Washington, MN | Pass | State |
| 2025-11-25 | BUSHMILLS ETHANOL INC | ATWATER, Kandiyohi, MN | Pass | State |
| 2025-11-24 | AMERICAN CRYSTAL SUGAR - EAST GRAND FORKS | EAST GRAND FORKS, Polk, MN | Pass | State |
| 2025-11-24 | ME GLOBAL INC | DULUTH, St. Louis, MN | Pass | State |
| 2025-11-20 | NORTHERN NATURAL GAS - ALBERT LEA | HARTLAND, Freeborn, MN | Pass | State |
| 2025-11-19 | CAMBRIA CO | LE SUEUR, Le Sueur, MN | Pass | State |
| 2025-11-19 | GRANITE FALLS ENERGY LLC | GRANITE FALLS, Yellow Medicine, MN | Pass | State |
| 2025-11-18 | CEMSTONE NONMETALLIC | MENDOTA HEIGHTS, Dakota, MN | Pass | State |
| 2025-11-18 | CAMBRIA CO | LE SUEUR, Le Sueur, MN | Pass | State |
| 2025-11-18 | NORTHERN NATURAL GAS CO - FARIBAULT | FARIBAULT, Rice, MN | Pass | State |
| 2025-11-17 | MINNESOTA POWER - HIBBARD RENEWABLE ENERGY CENTER | DULUTH, St. Louis, MN | Pass | State |
| 2025-11-11 | AMERICAN CRYSTAL SUGAR - MOORHEAD — high-priority violation on file | MOORHEAD, Clay, MN | Pass | State |
| 2025-11-11 | ALLIANCE PIPELINE - ALBERT LEA 25-A | ALBERT LEA, Freeborn, MN | Pass | State |
| 2025-11-11 | XCEL ENERGY - BLUE LAKE | SHAKOPEE, Scott, MN | Pass | State |
| 2025-11-10 | AMERICAN CRYSTAL SUGAR - MOORHEAD — high-priority violation on file | MOORHEAD, Clay, MN | Pass | State |
| 2025-11-06 | BADGER FOUNDRY COMPANY | WINONA, Winona, MN | Pass | State |
| 2025-11-05 | AMERICAN CRYSTAL SUGAR - MOORHEAD — high-priority violation on file | MOORHEAD, Clay, MN | Pass | State |
| 2025-11-05 | ADM - MARSHALL | MARSHALL, Lyon, MN | Pass | State |
| 2025-11-04 | AMERICAN CRYSTAL SUGAR - MOORHEAD — high-priority violation on file | MOORHEAD, Clay, MN | Fail | State |
| 2025-11-04 | VEOLIA WTS SOLUTIONS USA INC | MINNETONKA, Hennepin, MN | Pass | State |
| 2025-11-04 | HERON LAKE BIOENERGY LLC | HERON LAKE, Jackson, MN | Pass | State |
| 2025-11-04 | SPRUCE RIDGE INC | GLENCOE, McLeod, MN | N/A | State |
| 2025-11-04 | BADGER FOUNDRY COMPANY | WINONA, Winona, MN | Pass | State |
| 2025-10-30 | AMRIZE MIDWEST INC - NONMETALLIC | EAGAN, Dakota, MN | Pass | State |
| 2025-10-30 | GUARDIAN ENERGY LLC | JANESVILLE, Waseca, MN | Pass | State |
| 2025-10-29 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2025-10-29 | AMRIZE MIDWEST INC - NONMETALLIC | EAGAN, Dakota, MN | Pass | State |
| 2025-10-29 | BOISE WHITE PAPER LLC | INTERNATIONAL FALLS, Koochiching, MN | Pass | State |
| 2025-10-29 | SOUTHERN MINNESOTA BEET SUGAR COOP | RENVILLE, Renville, MN | Pass | State |
| 2025-10-28 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2025-10-28 | NORTHSHORE MINING CO - SILVER BAY | SILVER BAY, Lake, MN | Pass | State |
| 2025-10-28 | VALERO RENEWABLE FUELS CO LLC - WELCOME PLANT | WELCOME, Martin, MN | Pass | State |
| 2025-10-28 | SHAKOPEE MDEWAKANTON SIOUX COMMUNITY ORGANIC RECYCLING FACILITY | SHAKOPEE, Scott, MN | N/A | State |
| 2025-10-28 | DUININCK BROS INC - PORT PLANT 6 | PRINSBURG, Kandiyohi, MN | Fail | State |
| 2025-10-23 | AMERICAN CRYSTAL SUGAR - MOORHEAD — high-priority violation on file | MOORHEAD, Clay, MN | Pass | State |
| 2025-10-21 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2025-10-20 | JBS WORTHINGTON MN | WORTHINGTON, Nobles, MN | Pass | State |
| 2025-10-16 | UNITED STATES STEEL CORP - KEETAC | KEEWATIN, St. Louis, MN | Pass | State |
| 2025-10-16 | MARATHON SAINT PAUL PARK REFINERY | SAINT PAUL PARK, Washington, MN | N/A | State |
| 2025-10-14 | SAPPI CLOQUET LLC | CLOQUET, Carlton, MN | Pass | State |
| 2025-10-14 | EGA SPECTRO ALLOYS | ROSEMOUNT, Dakota, MN | Pass | State |
| 2025-10-14 | HEARTLAND CORN PRODUCTS | WINTHROP, Sibley, MN | Pass | State |
| 2025-10-13 | UNITED TACONITE LLC - FAIRLANE PLANT | FORBES, St. Louis, MN | Pass | State |
| 2025-10-13 | SUPERIOR MINERALS CO | SAVAGE, Scott, MN | Pass | State |
| 2025-10-09 | CRYSTAL VALLEY COOPERATIVE - MADELIA | MADELIA, Watonwan, MN | Pass | State |
| 2025-10-08 | ABBOTT NORTHWESTERN HOSPITAL | MINNEAPOLIS, Hennepin, MN | Pass | State |
| 2025-10-08 | FCA CO-OP | JACKSON, Jackson, MN | Pass | State |
| 2025-10-07 | AMERICAN CRYSTAL SUGAR - MOORHEAD — high-priority violation on file | MOORHEAD, Clay, MN | Pass | State |
| 2025-10-07 | CENTENNIAL GENERATING STATION | MOORHEAD, Clay, MN | Pass | State |
| 2025-10-06 | ANDERSEN CORPORATION | BAYPORT, Washington, MN | Pass | State |
| 2025-10-01 | MET COUNCIL - SENECA WWTP | EAGAN, Dakota, MN | Pass | State |
| 2025-09-30 | MCNAMARA CONTRACTING INC | ROSEMOUNT, Dakota, MN | Pass | State |
| 2025-09-30 | GREAT LAKES GAS TRANSMISSION - STATION 1 | SAINT VINCENT, Kittson, MN | N/A | State |
| 2025-09-30 | ADM - MARSHALL | MARSHALL, Lyon, MN | Pass | State |
| 2025-09-30 | BULK SILOS | SAINT PAUL, Ramsey, MN | Pass | State |
| 2025-09-30 | WISCONSIN CENTRAL LTD | DULUTH, St. Louis, MN | Pass | State |
| 2025-09-24 | USG INTERIORS LLC | RED WING, Goodhue, MN | Pass | State |
| 2025-09-23 | WM MUELLER & SONS INC | HAMBURG, Carver, MN | Pass | State |
| 2025-09-23 | MINNESOTA SOYBEAN PROCESSORS | BREWSTER, Nobles, MN | Pass | State |
| 2025-09-23 | ABBOTT | LITTLE CANADA, Ramsey, MN | N/A | State |
| 2025-09-22 | MINNESOTA POWER - BOSWELL ENERGY CENTER | COHASSET, Itasca, MN | Pass | State |
| 2025-09-22 | SMMPA METHANE ENERGY FACILITY | MORA, Kanabec, MN | N/A | State |
| 2025-09-16 | CUMMINS POWER GENERATION INC | FRIDLEY, Anoka, MN | Pass | State |
| 2025-09-16 | AG PROCESSING INC - DAWSON | DAWSON, Lac qui Parle, MN | Pass | State |
| 2025-09-16 | SAINT JAMES DIESEL GENERATING PLANT | SAINT JAMES, Watonwan, MN | Pass | State |
| 2025-09-15 | US STEEL CORP - MINNTAC | MOUNTAIN IRON, St. Louis, MN | Pass | State |
| 2025-09-09 | BLUE EARTH LIGHT AND WATER | BLUE EARTH, Faribault, MN | Pass | State |
| 2025-09-08 | UNITED TACONITE LLC - THUNDERBIRD MINE | EVELETH, St. Louis, MN | Pass | State |
| 2025-09-03 | KODA ENERGY, LLC — high-priority violation on file | SHAKOPEE, Scott, MN | Pass | State |
| 2025-09-03 | XCEL ENERGY - SHERBURNE COUNTY GENERATING PLANT | BECKER, Sherburne, MN | Pass | State |
| 2025-08-29 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2025-08-26 | HIBBING PUBLIC UTILITIES COMMISSION | HIBBING, St. Louis, MN | Pass | State |
| 2025-08-25 | CAMBRIA CO | LE SUEUR, Le Sueur, MN | Pass | State |
| 2025-08-21 | MINNESOTA PAVING AND MATERIALS - NUQQ | NEW ULM, Nicollet, MN | Pass | State |
| 2025-08-21 | ARDENT MILLS LLC | LAKE CITY, Wabasha, MN | Pass | State |
| 2025-08-21 | MARATHON SAINT PAUL PARK REFINERY | SAINT PAUL PARK, Washington, MN | N/A | State |
| 2025-08-19 | XCEL ENERGY - PRAIRIE ISLAND NUCLEAR PLANT | WELCH, Goodhue, MN | Pass | State |
| 2025-08-19 | GREEN PLAINS OTTER TAIL LLC | FERGUS FALLS, Otter Tail, MN | Pass | State |
| 2025-08-14 | GOPHER RESOURCE LLC | EAGAN, Dakota, MN | Pass | State |
| 2025-08-13 | XCEL ENERGY - SHERBURNE COUNTY GENERATING PLANT | BECKER, Sherburne, MN | Pass | State |
| 2025-08-13 | XCEL ENERGY - SHERBURNE COUNTY GENERATING PLANT | BECKER, Sherburne, MN | Pass | State |
| 2025-08-13 | XCEL ENERGY - SHERBURNE COUNTY GENERATING PLANT | BECKER, Sherburne, MN | Pass | State |
| 2025-08-12 | SAPPI CLOQUET LLC | CLOQUET, Carlton, MN | Pass | State |
| 2025-08-12 | MOORHEAD CITY OF - AIR CURTAIN INCINERATOR | MOORHEAD, Clay, MN | Pass | State |
| 2025-08-12 | GOPHER RESOURCE LLC | EAGAN, Dakota, MN | Pass | State |
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Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.