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 |
|---|---|---|---|---|
| 2025-03-27 | AL-CORN CLEAN FUEL LLC | CLAREMONT, Dodge, MN | Pass | State |
| 2025-03-25 | CHS MANKATO | MANKATO, Blue Earth, MN | Pass | State |
| 2025-03-25 | BLOOMING PRAIRIE PUBLIC UTILITIES | BLOOMING PRAIRIE, Steele, MN | N/A | State |
| 2025-03-24 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2025-03-21 | HUTCHINSON UTILITIES-PLANT 2 | HUTCHINSON, McLeod, MN | Pass | State |
| 2025-03-21 | UNITED TACONITE LLC - FAIRLANE PLANT | FORBES, St. Louis, MN | Pass | State |
| 2025-03-20 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2025-03-20 | NORTHSHORE MINING CO - SILVER BAY | SILVER BAY, Lake, MN | Pass | State |
| 2025-03-19 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2025-03-19 | SMMPA METHANE ENERGY FACILITY | MORA, Kanabec, MN | Pass | State |
| 2025-03-18 | HERON LAKE BIOENERGY LLC | HERON LAKE, Jackson, MN | Pass | State |
| 2025-03-18 | HUTCHINSON UTILITIES PLANT 1 | HUTCHINSON, McLeod, MN | Fail | State |
| 2025-03-18 | PRINCETON PUBLIC UTILITIES COMMISSION | PRINCETON, Mille Lacs, MN | Pass | State |
| 2025-03-18 | MET COUNCIL METROPOLITAN WATER RESOURCE RECOVERY FACILITY | SAINT PAUL, Ramsey, MN | Pass | State |
| 2025-03-06 | BOISE WHITE PAPER LLC | INTERNATIONAL FALLS, Koochiching, MN | Pass | State |
| 2025-03-04 | MANKATO ENERGY CENTER | MANKATO, Blue Earth, MN | Pass | State |
| 2025-03-04 | AL-CORN CLEAN FUEL LLC | CLAREMONT, Dodge, MN | Fail | State |
| 2025-03-04 | MINNESOTA POWER - BOSWELL ENERGY CENTER | COHASSET, Itasca, MN | Pass | State |
| 2025-02-26 | DISTRICT ENERGY ST PAUL/ST PAUL COGENERATION L | SAINT PAUL, Ramsey, MN | Pass | State |
| 2025-02-25 | POET BIOREFINING - BINGHAM LAKE | BINGHAM LAKE, Cottonwood, MN | Pass | State |
| 2025-02-25 | XCEL ENERGY - RIVERSIDE GENERATING PLANT | MINNEAPOLIS, Hennepin, MN | Pass | State |
| 2025-02-25 | HEARTLAND CORN PRODUCTS | WINTHROP, Sibley, MN | Pass | State |
| 2025-02-20 | OLMSTED COUNTY WASTE-TO-ENERGY FACILITY | ROCHESTER, Olmsted, MN | Pass | State |
| 2025-02-18 | GREENFIELD GLOBAL WINNEBAGO LLC | WINNEBAGO, Faribault, MN | Pass | State |
| 2025-02-13 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2025-02-11 | XCEL ENERGY - HIGH BRIDGE GENERATING STATION | SAINT PAUL, Ramsey, MN | Pass | State |
| 2025-02-11 | MET COUNCIL METROPOLITAN WATER RESOURCE RECOVERY FACILITY | SAINT PAUL, Ramsey, MN | Pass | State |
| 2025-02-10 | XCEL ENERGY - MONTICELLO NUCLEAR GENERATING FACILITY | MONTICELLO, Wright, MN | Pass | State |
| 2025-02-04 | AMERICAN CRYSTAL SUGAR - EAST GRAND FORKS | EAST GRAND FORKS, Polk, MN | Pass | State |
| 2025-01-28 | MAYO CLINIC - WASTE MANAGEMENT FACILITY | ROCHESTER, Olmsted, MN | Pass | State |
| 2025-01-28 | XCEL ENERGY - BLUE LAKE | SHAKOPEE, Scott, MN | Pass | State |
| 2025-01-28 | XCEL ENERGY - BLUE LAKE | SHAKOPEE, Scott, MN | Pass | State |
| 2025-01-27 | UNITED TACONITE LLC - FAIRLANE PLANT | FORBES, St. Louis, MN | Pass | State |
| 2025-01-22 | ANDERSEN CORPORATION | BAYPORT, Washington, MN | Pass | State |
| 2025-01-21 | CHS OILSEED PROCESSING | FAIRMONT, Martin, MN | Pass | State |
| 2025-01-09 | ENVIRO-CHEM | ROGERS, Hennepin, MN | Pass | State |
| 2025-01-08 | MET COUNCIL - SENECA WWTP | EAGAN, Dakota, MN | Pass | State |
| 2025-01-08 | MET COUNCIL - SENECA WWTP | 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.