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The Mississippi River - Winona Watershed covers 419,200 acres in the southeast Minnesota counties of Wabasha, Winona, and Olmsted. A majority of the watershed is cropland, with forest and grassland covering large portions as well.
The MPCA has actively been developing methods and building capacity to improve our ability to monitor and assess wetlands to protect and restore them.
A training and certification program for evaluating aquatic life in Minnesota’s rivers and streams.
MPCA permits are required to both build and operate landfills in Minnesota.
Sustainable aviation fuel (SAF) is low-carbon synthetic fuel made from non-petroleum sources that is blended with traditional jet fuel to reduce greenhouse gas emissions from air transportation.
Water scientists from the MPCA published four watershed reports in 2025, updating the data we need to keep Minnesota’s waters clean and protected.
Local governments with SSTS programs submit information to the MPCA each year on SSTS permitting and compliance trends for the previous calendar year. The information helps the agency with long-range planning efforts.
Stephen Funk shared his story as part of We Are Water MN, a traveling exhibit and community engagement program that explores Minnesotans’ relationships with water.
One indicator of impairment that puts a stream on the Impaired Waters List is its macroinvertebrate population. Here's how that works.
Environmental rules and regulations are essential tools used to protect Minnesota’s environment, setting standards for environmental quality and limits on pollutants that can be discharged from facilities. The MPCA helps protect our environment by writing and enforcing these rules and regulations.
This watershed is located in the southeastern tip of Minnesota, known for its scenic bluffs. More than 900,000 acres drain to the Mississippi River at Reno, Minn., but only 117,000 of those acres are in Minnesota.
The Minnesota Pollution Control Agency (MPCA) is planning to add sites in New Hope, Saint Paul, and Rochester to the state's Permanent List of Priorities (PLP). Members of the public are invited to provide comments.
Areas and communities with SSTS concerns have wastewater treatment methods that are not adequate to protect public health or the environment. Hundreds of small communities around the state have inadequate wastewater systems.
A legacy of trichloroethylene disposal at the General Mills/Henkel Corp. Superfund Site at 2010 East Hennepin created an area of groundwater contamination that has led to vapors traveling upward through the soil, where it can enter houses and buildings.
The MPCA is working to address environmental concerns at the closed Freeway Landfill, to prevent the buried waste from affecting drinking water and the nearby Minnesota River.
Financial assistance for SSTS work is targeted to units of local government.
Minnesota state agencies are working together to reduce greenhouse gas emissions that cause climate change.
Groundwater is the source of drinking water for about 75% of all Minnesotans and provides almost all of the water used to irrigate crops. Its purity and availability is critical to the health of the state.
The MPCA provides additional guidance on air permitting and regulation requirements: New source review – Obtain a permit before beginning construction on new major-emitting industrial facilities…
After many years of investigation, design work and construction, the Great Lakes Legacy Act remediation projects at these sites near Duluth, Minnesota, are complete.