EPA Air · stack tests by state and year
Air-emissions stack tests in Minnesota, 2026
- 84Stack 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 2026; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in Minnesota, 2026
- Dakota County 11
- Polk County 7
- Washington County 7
- Scott County 4
- Sherburne County 4
- St. Louis County 4
- Martin County 3
- Nobles County 3
- Carver County 3
Minnesota, other years
Air-emissions stack tests recorded in Minnesota, 2026
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2026-06-29 | XCEL ENERGY - SHERBURNE COUNTY GENERATING PLANT | BECKER, Sherburne, MN | Pass | State |
| 2026-06-25 | XCEL ENERGY - ALLEN S KING GENERATING PLANT | BAYPORT, Washington, MN | Pass | State |
| 2026-06-24 | RJ ZAVORAL AND SONS INC HMA PORTABLE PLANT 1 | EAST GRAND FORKS, Polk, MN | Pass | State |
| 2026-06-16 | KODA ENERGY, LLC — high-priority violation on file | SHAKOPEE, Scott, MN | Fail | State |
| 2026-06-11 | MARATHON SAINT PAUL PARK REFINERY | SAINT PAUL PARK, Washington, MN | Pass | State |
| 2026-06-02 | XCEL ENERGY - WESCOTT LNG PLANT | INVER GROVE HEIGHTS, Dakota, MN | Pass | State |
| 2026-06-02 | GREAT RIVER ENERGY - LAKEFIELD JUNCTION STATION | TRIMONT, Martin, MN | Pass | State |
| 2026-05-27 | 3M HUTCHINSON | HUTCHINSON, McLeod, MN | Pass | State |
| 2026-05-27 | ME GLOBAL INC | DULUTH, St. Louis, MN | Pass | State |
| 2026-05-27 | DENCO II LLC | MORRIS, Stevens, MN | Pass | State |
| 2026-05-26 | KRAEMER MINING & MATERIALS - BURNSVILLE | BURNSVILLE, Dakota, MN | Pass | State |
| 2026-05-21 | SHAKOPEE MDEWAKANTON SIOUX COMMUNITY ORGANIC RECYCLING FACILITY | SHAKOPEE, Scott, MN | N/A | State |
| 2026-05-20 | CHIPPEWA VALLEY ETHANOL COMPANY | BENSON, Swift, MN | N/A | State |
| 2026-05-20 | RJ ZAVORAL AND SONS INC NONMETALLIC PORTABLE CRUSHING PLANTS 1 AND 2 | GENTILLY, Polk, MN | Pass | State |
| 2026-05-12 | WEST FRASER US EWP - BEMIDJI | SOLWAY, Beltrami, MN | Pass | State |
| 2026-05-12 | SAPPI CLOQUET LLC | CLOQUET, Carlton, MN | Pass | State |
| 2026-05-12 | CHS HALLOCK | KENNEDY, Kittson, MN | Pass | State |
| 2026-05-11 | CAMBRIA CO | LE SUEUR, Le Sueur, MN | Pass | State |
| 2026-05-07 | ADM - MARSHALL | MARSHALL, Lyon, MN | Pass | State |
| 2026-05-06 | POET BIOREFINING - BINGHAM LAKE | BINGHAM LAKE, Cottonwood, MN | Pass | State |
| 2026-05-06 | OLDCASTLE INFRASTRUCTURE INC | HANCOCK, Stevens, MN | Pass | State |
| 2026-05-05 | XCEL ENERGY - WILMARTH GENERATING PLANT | MANKATO, Blue Earth, MN | Pass | State |
| 2026-05-05 | MINNESOTA POWER - BOSWELL ENERGY CENTER | COHASSET, Itasca, MN | Pass | State |
| 2026-05-05 | XCEL ENERGY - SHERBURNE COUNTY GENERATING PLANT | BECKER, Sherburne, MN | Pass | State |
| 2026-05-05 | ELK RIVER LANDFILL, INC. | ELK RIVER, Sherburne, MN | Pass | State |
| 2026-05-04 | LSP COTTAGE GROVE COGENERATION FACILITY | COTTAGE GROVE, Washington, MN | Pass | State |
| 2026-04-30 | GUARDIAN ENERGY LLC | JANESVILLE, Waseca, MN | Pass | State |
| 2026-04-29 | AMRIZE MIDWEST INC - NONMETALLIC | EAGAN, Dakota, MN | Pass | State |
| 2026-04-29 | PERHAM RESOURCE RECOVERY FACILITY | PERHAM, Otter Tail, MN | Pass | State |
| 2026-04-28 | POLK COUNTY RESOURCE RECOVERY FACILITY | FOSSTON, Polk, MN | Pass | State |
| 2026-04-21 | XCEL ENERGY - RED WING GENERATING PLANT | RED WING, Goodhue, MN | Pass | State |
| 2026-04-21 | XCEL ENERGY - PRAIRIE ISLAND NUCLEAR PLANT | WELCH, Goodhue, MN | Pass | State |
| 2026-04-21 | VEOLIA WTS SOLUTIONS USA INC | MINNETONKA, Hennepin, MN | Pass | State |
| 2026-04-21 | ADM - MARSHALL | MARSHALL, Lyon, MN | Pass | State |
| 2026-04-21 | OLMSTED COUNTY WASTE-TO-ENERGY FACILITY | ROCHESTER, Olmsted, MN | Pass | State |
| 2026-04-20 | JBS WORTHINGTON MN | WORTHINGTON, Nobles, MN | Pass | State |
| 2026-04-16 | HEARTLAND CORN PRODUCTS | WINTHROP, Sibley, MN | Pass | State |
| 2026-04-15 | SAINT CLOUD WWTP | SAINT CLOUD, Stearns, MN | Pass | State |
| 2026-04-14 | NORTHERN NATURAL GAS CO - NORTH BRANCH | HARRIS, Chisago, MN | Pass | State |
| 2026-04-14 | AMERICAN CRYSTAL SUGAR - EAST GRAND FORKS | EAST GRAND FORKS, Polk, MN | Pass | State |
| 2026-04-08 | CABINETWORKS GROUP | WACONIA, Carver, MN | Pass | State |
| 2026-04-08 | CHIPPEWA VALLEY ETHANOL COMPANY | BENSON, Swift, MN | Pass | State |
| 2026-04-08 | LSP COTTAGE GROVE COGENERATION FACILITY | COTTAGE GROVE, Washington, MN | Pass | State |
| 2026-04-06 | MOM BRANDS | NORTHFIELD, Rice, MN | N/A | State |
| 2026-04-03 | HEARTLAND CORN PRODUCTS | WINTHROP, Sibley, MN | Pass | State |
| 2026-04-02 | JBS WORTHINGTON MN | WORTHINGTON, Nobles, MN | Pass | State |
| 2026-03-31 | HERON LAKE BIOENERGY LLC | HERON LAKE, Jackson, MN | Pass | State |
| 2026-03-31 | ANDERSEN CORPORATION | BAYPORT, Washington, MN | Pass | State |
| 2026-03-25 | AL-CORN CLEAN FUEL LLC | CLAREMONT, Dodge, MN | Pass | State |
| 2026-03-25 | MINNESOTA POWER - HIBBARD RENEWABLE ENERGY CENTER | DULUTH, St. Louis, MN | Pass | State |
| 2026-03-24 | CABINETWORKS GROUP | WACONIA, Carver, MN | Pass | State |
| 2026-03-24 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2026-03-24 | KODA ENERGY, LLC — high-priority violation on file | SHAKOPEE, Scott, MN | Pass | State |
| 2026-03-18 | WEST FRASER US EWP - BEMIDJI | SOLWAY, Beltrami, MN | Pass | State |
| 2026-03-18 | UNITED TACONITE LLC - FAIRLANE PLANT | FORBES, St. Louis, MN | Pass | State |
| 2026-03-17 | BUSHMILLS ETHANOL INC | ATWATER, Kandiyohi, MN | Pass | State |
| 2026-03-12 | BOISE WHITE PAPER LLC | INTERNATIONAL FALLS, Koochiching, MN | Pass | State |
| 2026-03-10 | OWATONNA ENERGY STATION | OWATONNA, Steele, MN | Pass | State |
| 2026-03-05 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2026-03-05 | US STEEL CORP - MINNTAC | MOUNTAIN IRON, St. Louis, MN | Pass | State |
| 2026-03-03 | SOUTHERN MINNESOTA MUNICIPAL POWER AGENCY FAIRMONT ENERGY STATION | FAIRMONT, Martin, MN | Pass | State |
| 2026-03-03 | KODA ENERGY, LLC — high-priority violation on file | SHAKOPEE, Scott, MN | Pass | State |
| 2026-02-26 | NORTHERN NATURAL GAS CO - HINCKLEY | HINCKLEY, Pine, MN | Pass | State |
| 2026-02-24 | AMERICAN CRYSTAL SUGAR - EAST GRAND FORKS | EAST GRAND FORKS, Polk, MN | Fail | State |
| 2026-02-19 | NORTHERN NATURAL GAS - FARMINGTON | FARMINGTON, Dakota, MN | Pass | State |
| 2026-02-18 | NORTHERN NATURAL GAS CO - CARVER | CARVER, Carver, MN | Pass | State |
| 2026-02-18 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2026-02-17 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2026-02-17 | POET BIOREFINING GLENVILLE LLC | ALBERT LEA, Freeborn, MN | Pass | State |
| 2026-02-17 | AMERICAN CRYSTAL SUGAR - EAST GRAND FORKS | EAST GRAND FORKS, Polk, MN | Pass | State |
| 2026-02-10 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2026-02-10 | MAYO MEDICAL CENTER - ROCHESTER | ROCHESTER, Olmsted, MN | Pass | State |
| 2026-02-10 | XCEL ENERGY - HIGH BRIDGE GENERATING STATION | SAINT PAUL, Ramsey, MN | Pass | State |
| 2026-02-04 | DISTRICT ENERGY ST PAUL/ST PAUL COGENERATION L | SAINT PAUL, Ramsey, MN | Pass | State |
| 2026-01-27 | XCEL ENERGY - ALLEN S KING GENERATING PLANT | BAYPORT, Washington, MN | N/A | State |
| 2026-01-26 | AMERICAN CRYSTAL SUGAR - EAST GRAND FORKS | EAST GRAND FORKS, Polk, MN | Pass | State |
| 2026-01-20 | NORTHLAND ALUMINUM PRODUCTS | SAINT LOUIS PARK, Hennepin, MN | N/A | State |
| 2026-01-20 | CHS OILSEED PROCESSING | FAIRMONT, Martin, MN | Pass | State |
| 2026-01-20 | ANDERSEN CORPORATION | BAYPORT, Washington, MN | Pass | State |
| 2026-01-13 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2026-01-13 | SANIMAX USA INC | SOUTH SAINT PAUL, Dakota, MN | Pass | State |
| 2026-01-08 | AMERICAN CRYSTAL SUGAR - MOORHEAD — high-priority violation on file | MOORHEAD, Clay, MN | Pass | State |
| 2026-01-06 | MINNESOTA SOYBEAN PROCESSORS | BREWSTER, Nobles, MN | Pass | State |
| 2026-01-06 | XCEL ENERGY - SHERBURNE COUNTY GENERATING PLANT | BECKER, Sherburne, MN | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.