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Coal tar-based sealants can no longer be sold or applied legally in Minnesota as of 2014.
The kind of permit a facility needs depends on how much air pollution the facility could emit based on its equipment or processes.
The MPCA's air monitors continually measure pollutants. With this data, the agency can track pollution trends over time and show if outdoor air meets air quality standards and health benchmarks.
Recent air permits issued by the MPCA can be found in What's in My Neighborhood. The tool does not currently include all previously issued air emissions permits. All air emissions permits issued by…
The Regional Haze Rule requires states to improve visibility in our nation's national parks and wildernesses (Class I areas) and restore them to natural visibility conditions by 2064.
For more than 50 years, volunteers have gathered critically important water clarity data on Minnesota lakes and streams.
Particulate matter (PM) refers to various air particles, including dust, soot, smoke, and liquid droplets that range in size from less than 0.1 microns in diameter (smaller than a single bacterium)…
The MPCA studies, monitors, and regulates many land pollutants that affect the quality of life in Minnesota and the health of residents.
Proposed changes to permits that regulate the state’s largest animal feedlots target nitrate pollution statewide.
The MPCA has released the draft 2025 Minnesota Nutrient Reduction Strategy for public review and comment.
MagIron LLC proposes to restart a mining and processing facility near Grand Rapids, which will require new air and industrial wastewater permits from the MPCA.
Elevated levels of tetrachloroethylene and trichloroethylene have been found in soil vapor around this site in St. Paul.
DENCO II LLC failed a stack test in April, 2024, that showed that the facility exceeded its permit limit for particulate matter by more than 170%.
MPCA investigation in 2025 found that Sheldahl Flexible Technologies submitted incorrect permit applications and failed to obtain MPCA approval prior to installing or modifying three pieces of industrial mixing equipment.
The MPCA has developed a report to help improve the data when the volume of trash or recyclables has to be converted to weight.
MPCA investigation found stormwater permit violations that occurred during a construction project in 2025, with sediment-laden stormwater entering a stream at a construction site in Chaska.
Al-Corn Clean Fuel, LLC, an ethanol plant in Dodge County, paid $40,427 in fines for air permit violations.
The MPCA created a statewide inventory of streams that have been hydrologically modified: channelized, ditched, or impounded
A project to address high levels of suspended sediment in the Minnesota River and the South Metro portion of the Mississippi River.
During the 2023 legislative session, legislators passed more than a dozen funding and policy proposals to address food waste, organics, recycling market development, and wood waste.