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 |
|---|---|---|---|---|
| 2025-08-12 | COMMERCIAL ASPHALT CO - PLANT 902 | BURNSVILLE, Dakota, MN | Pass | State |
| 2025-08-12 | LAKEVILLE - KELLY PIT | LAKEVILLE, Dakota, MN | Pass | State |
| 2025-08-12 | DAKOTA AGGREGATES - UMORE PARK FACILITY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2025-08-07 | INTERPLASTIC CORP - MINNEAPOLIS PLANT | MINNEAPOLIS, Hennepin, MN | Pass | State |
| 2025-08-06 | HORMEL FOODS CORPORATION - AUSTIN PLANT | AUSTIN, Mower, MN | N/A | State |
| 2025-08-06 | NORTHLAND CONSTRUCTORS OF DULUTH - NONMETALLIC | DULUTH, St. Louis, MN | Pass | State |
| 2025-08-05 | GREDE LLC - SAINT CLOUD | SAINT CLOUD, Benton, MN | Pass | State |
| 2025-08-05 | USG INTERIORS LLC - CLOQUET MN | CLOQUET, Carlton, MN | Pass | State |
| 2025-08-05 | BUSHMILLS ETHANOL INC | ATWATER, Kandiyohi, MN | Fail | State |
| 2025-08-05 | ADM - MARSHALL | MARSHALL, Lyon, MN | Pass | State |
| 2025-08-05 | MOM BRANDS | NORTHFIELD, Rice, MN | N/A | State |
| 2025-08-04 | AMRIZE MIDWEST INC - NONMETALLIC | EAGAN, Dakota, MN | Pass | State |
| 2025-07-31 | CERTAINTEED LLC | SHAKOPEE, Scott, MN | Pass | State |
| 2025-07-30 | XCEL ENERGY - SHERBURNE COUNTY GENERATING PLANT | BECKER, Sherburne, MN | Pass | State |
| 2025-07-29 | ADM - MARSHALL | MARSHALL, Lyon, MN | Pass | State |
| 2025-07-28 | HENNEPIN ENERGY RECOVERY CENTER | MINNEAPOLIS, Hennepin, MN | Pass | State |
| 2025-07-28 | XCEL ENERGY - MONTICELLO NUCLEAR GENERATING FACILITY | MONTICELLO, Wright, MN | Pass | State |
| 2025-07-23 | POET BIOREFINING - PRESTON | PRESTON, Fillmore, MN | Pass | State |
| 2025-07-22 | MINNESOTA POWER - BOSWELL ENERGY CENTER | COHASSET, Itasca, MN | Pass | State |
| 2025-07-22 | NORTHSHORE MINING CO - SILVER BAY | SILVER BAY, Lake, MN | Pass | State |
| 2025-07-22 | CAMBRIA CO | LE SUEUR, Le Sueur, MN | Pass | State |
| 2025-07-22 | XCEL ENERGY - ALLEN S KING GENERATING PLANT | BAYPORT, Washington, MN | Pass | State |
| 2025-07-15 | SAPPI CLOQUET LLC | CLOQUET, Carlton, MN | Pass | State |
| 2025-07-15 | ADM - MARSHALL | MARSHALL, Lyon, MN | Pass | State |
| 2025-07-15 | CHIPPEWA VALLEY ETHANOL COMPANY | BENSON, Swift, MN | Pass | State |
| 2025-07-10 | CS MCCROSSAN CONSTRUCTION INC | MAPLE GROVE, Hennepin, MN | Pass | State |
| 2025-07-09 | ANCHOR GLASS CONTAINER CORP | SHAKOPEE, Scott, MN | Pass | State |
| 2025-07-08 | USG INTERIORS LLC | RED WING, Goodhue, MN | N/A | State |
| 2025-07-08 | VEOLIA WTS SOLUTIONS USA INC | MINNETONKA, Hennepin, MN | Pass | State |
| 2025-07-08 | MARATHON SAINT PAUL PARK REFINERY | SAINT PAUL PARK, Washington, MN | Pass | State |
| 2025-07-07 | ULLAND BROTHERS INC | CLOQUET, Carlton, MN | Pass | State |
| 2025-07-07 | UNITED STATES STEEL CORP - KEETAC | KEEWATIN, St. Louis, MN | Pass | State |
| 2025-07-01 | HEARTLAND CORN PRODUCTS | WINTHROP, Sibley, MN | Pass | State |
| 2025-07-01 | MARTIN MARIETTA MATERIALS INC - SAINT CLOUD QUARRY | WAITE PARK, Stearns, MN | Pass | State |
| 2025-06-30 | POLK COUNTY RESOURCE RECOVERY FACILITY | FOSSTON, Polk, MN | Pass | State |
| 2025-06-25 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | N/A | State |
| 2025-06-25 | BOISE WHITE PAPER LLC | INTERNATIONAL FALLS, Koochiching, MN | Pass | State |
| 2025-06-25 | HOOVER CONSTRUCTION CO - NONMETALLIC | VIRGINIA, St. Louis, MN | Pass | State |
| 2025-06-24 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | N/A | State |
| 2025-06-24 | CENTRAL SPECIALTIES INC - PLANT 6 | ALEXANDRIA, Douglas, MN | Pass | State |
| 2025-06-23 | COVIA SOLUTIONS LLC - OTTAWA PLANT | LE SUEUR, Le Sueur, MN | Pass | State |
| 2025-06-19 | ARDENT MILLS LLC HASTINGS, MN | HASTINGS, Dakota, MN | Pass | State |
| 2025-06-19 | KGM CONTRACTORS INC - HMA PLANT | ANGORA, Undetermined, MN | Pass | State |
| 2025-06-17 | BENSON MUNICIPAL UTILITIES | BENSON, Swift, MN | Pass | State |
| 2025-06-12 | HUTCHINSON UTILITIES PLANT 1 | HUTCHINSON, McLeod, MN | Pass | State |
| 2025-06-11 | AL-CORN CLEAN FUEL LLC | CLAREMONT, Dodge, MN | Pass | State |
| 2025-06-10 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2025-06-10 | HIBBING TACONITE CO | HIBBING, St. Louis, MN | Pass | State |
| 2025-06-10 | ARDENT MILLS LLC | LAKE CITY, Wabasha, MN | Fail | State |
| 2025-06-05 | MET COUNCIL METROPOLITAN WATER RESOURCE RECOVERY FACILITY | SAINT PAUL, Ramsey, MN | Pass | State |
| 2025-06-05 | COLD SPRING GRANITE CO - MAIN CAMPUS | COLD SPRING, Stearns, MN | Pass | State |
| 2025-06-03 | GREAT LAKES GAS TRANSMISSION - STATION 1 | SAINT VINCENT, Kittson, MN | Pass | State |
| 2025-05-28 | ABBOTT NORTHWESTERN HOSPITAL | MINNEAPOLIS, Hennepin, MN | N/A | State |
| 2025-05-28 | OTTER LAKE TECHNOLOGIES | WHITE BEAR TOWNSHIP, Ramsey, MN | Pass | State |
| 2025-05-27 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2025-05-27 | KODA ENERGY, LLC — high-priority violation on file | SHAKOPEE, Scott, MN | Pass | State |
| 2025-05-26 | MARVIN WINDOWS AND DOORS | WARROAD, Roseau, MN | Pass | State |
| 2025-05-23 | SAPPI CLOQUET LLC | CLOQUET, Carlton, MN | Pass | State |
| 2025-05-23 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | N/A | State |
| 2025-05-22 | LITCHFIELD CITY OF | LITCHFIELD, Meeker, MN | Pass | State |
| 2025-05-22 | MARATHON SAINT PAUL PARK REFINERY | SAINT PAUL PARK, Washington, MN | N/A | State |
| 2025-05-21 | SAPPI CLOQUET LLC | CLOQUET, Carlton, MN | Pass | State |
| 2025-05-21 | 3M CHEMICAL OPERATIONS' COTTAGE GROVE FACILITY - ABRASIVES | COTTAGE GROVE, Washington, MN | Pass | State |
| 2025-05-20 | SOUTHERN MINNESOTA MUNICIPAL POWER AGENCY FAIRMONT ENERGY STATION | FAIRMONT, Martin, MN | Pass | State |
| 2025-05-20 | ANCHOR GLASS CONTAINER CORP | SHAKOPEE, Scott, MN | Pass | State |
| 2025-05-14 | 3M HUTCHINSON | HUTCHINSON, McLeod, MN | Pass | State |
| 2025-05-14 | MET COUNCIL METROPOLITAN WATER RESOURCE RECOVERY FACILITY | SAINT PAUL, Ramsey, MN | Fail | State |
| 2025-05-14 | SAINT PAUL DEPARTMENT OF PUBLIC WORKS/ASPHALT PLT | SAINT PAUL, Ramsey, MN | Pass | State |
| 2025-05-14 | ME GLOBAL INC | DULUTH, St. Louis, MN | Pass | State |
| 2025-05-13 | SPECIALTY MINERALS INC - CLOQUET | CLOQUET, Carlton, MN | Pass | State |
| 2025-05-13 | REDWOOD FALLS PUBLIC UTILITIES - S PLANT | REDWOOD FALLS, Redwood, MN | Pass | State |
| 2025-05-13 | DENCO II LLC | MORRIS, Stevens, MN | Pass | State |
| 2025-05-12 | HIBBING TACONITE CO | HIBBING, St. Louis, MN | N/A | State |
| 2025-05-07 | XCEL ENERGY - WILMARTH GENERATING PLANT | MANKATO, Blue Earth, MN | Pass | State |
| 2025-05-07 | MINNESOTA POWER - BOSWELL ENERGY CENTER | COHASSET, Itasca, MN | Pass | State |
| 2025-05-07 | US STEEL CORP - MINNTAC | MOUNTAIN IRON, St. Louis, MN | N/A | State |
| 2025-05-06 | KNIFE RIVER CENTRAL MINNESOTA | SAUK RAPIDS, Benton, MN | Pass | State |
| 2025-05-02 | VIKING GAS TRANSMISSION - ANGUS COMPRESSOR STATION | ANGUS, Polk, MN | Pass | State |
| 2025-05-01 | VIKING GAS TRANSMISSION CO - FRAZEE COMPRESSOR STATION | FRAZEE, Otter Tail, MN | Pass | State |
| 2025-05-01 | US STEEL CORP - MINNTAC | MOUNTAIN IRON, St. Louis, MN | Pass | State |
| 2025-04-30 | VIKING GAS TRANSMISSION CO - ADA COMPRESSOR STATION | ADA, Norman, MN | Pass | State |
| 2025-04-29 | CAMBRIA CO | LE SUEUR, Le Sueur, MN | Pass | State |
| 2025-04-29 | LSP COTTAGE GROVE COGENERATION FACILITY | COTTAGE GROVE, Washington, MN | Pass | State |
| 2025-04-28 | OLMSTED COUNTY WASTE-TO-ENERGY FACILITY | ROCHESTER, Olmsted, MN | Pass | State |
| 2025-04-24 | SAINT CLOUD WWTP | SAINT CLOUD, Stearns, MN | Pass | State |
| 2025-04-22 | POPE/DOUGLAS SOLID WASTE MANAGEMENT | ALEXANDRIA, Douglas, MN | Pass | State |
| 2025-04-22 | XCEL ENERGY - RED WING GENERATING PLANT | RED WING, Goodhue, MN | Pass | State |
| 2025-04-22 | POLK COUNTY RESOURCE RECOVERY FACILITY | FOSSTON, Polk, MN | Fail | State |
| 2025-04-21 | BOISE WHITE PAPER LLC | INTERNATIONAL FALLS, Koochiching, MN | Pass | State |
| 2025-04-21 | US STEEL CORP - MINNTAC | MOUNTAIN IRON, St. Louis, MN | Pass | State |
| 2025-04-17 | KINDER MORGAN TERMINALS LLC SPRING VALLEY TERMINAL | SPRING VALLEY, Fillmore, MN | Pass | State |
| 2025-04-16 | CABINETWORKS GROUP | WACONIA, Carver, MN | Pass | State |
| 2025-04-15 | GREDE LLC - SAINT CLOUD | SAINT CLOUD, Benton, MN | Pass | State |
| 2025-04-15 | USG INTERIORS LLC - CLOQUET MN | CLOQUET, Carlton, MN | Fail | State |
| 2025-04-10 | MACTAC | MINNEAPOLIS, Hennepin, MN | Pass | State |
| 2025-04-08 | GOPHER RESOURCE LLC | EAGAN, Dakota, MN | Pass | State |
| 2025-04-08 | HEARTLAND CORN PRODUCTS | WINTHROP, Sibley, MN | Pass | State |
| 2025-04-08 | ANDERSEN CORPORATION | BAYPORT, Washington, MN | Pass | State |
| 2025-04-02 | NORTH BRANCH CITY OF | NORTH BRANCH, Chisago, MN | Pass | State |
| 2025-04-01 | OWATONNA ENERGY STATION | OWATONNA, Steele, MN | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.