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To help you quickly determine whether this permit affects you, what your requirements are, and what to do next, the MPCA has developed an Applicability flow chart

The health of Minnesota's large rivers is a reflection of how well we are protecting overall water quality.

BMPs required to manage the slurry to comply with Minnesota statute and agency rules to protect water quality.

A new planning effort in northwest Minnesota takes a basin-wide approach to reducing the state's phosphorous contributions to the Red River, and to Canada's Lake Winnipeg.

The Cedar River Watershed in Minnesota encompasses 454,029 acres in Mower, Freeborn, Dodge, and Steele counties. This watershed covers prime agricultural land with many streams and drainage ditches flowing into the river.

Environmental information and resources for the automotive industry

Image Climate change is having a profound impact on Minnesota's natural environment. Many of our state's iconic native plants and animals — from birch…

Lake of the Woods is a big lake with a big problem caused by one of nature’s smallest organisms: algae. Scientists from the MPCA and the Science Museum are working together to understand why.

Canby Creek now flows into Del Clark Lake and protects Canby from flooding, while providing outdoor recreation and excellent water quality.

The Little Fork River Watershed covers nearly 1.2 million acres, the main stem flowing 160 miles through north-central St. Louis County and heading northwest into Koochiching County. It flows more northerly until it reaches its confluence with the Rainy River about 11 miles west of International Falls.

Resources for wastewater clients.

Controlling phosphorus is an important part of protecting Minnesota waters.

Initial screening information for a contaminant of emerging concern, triclocarban.

Mesabi Metallics is currently constructing a new taconite mine and taconite pellet production facility on the site of the former Butler Taconite Mining Company facility near Nashwauk.

Answers to frequently asked questions about compliance and MPCA's enforcement of environmental rules in Minnesota.

Initial screening information for a contaminant of emerging concern, perfluorooctane sulfonate.

The MPCA recognized 236 wastewater facilities for outstanding operations in 2024.

Northshore Mining Company has applied for updated wastewater and air quality permits for its Silver Bay taconite processing plant and Mile Post 7 tailings basin.

Permit addresses the most common causes of contaminated groundwater, including releases of petroleum, volatile organic compounds, and other hazardous substances.

Initial screening information for a contaminant of emerging concern, Perfluorohexane sulfonic acid.