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The Rainy River - Headwaters Watershed covers nearly 1.9 million acres, starting in northern Cook and Lake Counties and flowing west/northwesterly into St. Louis County and the Canadian border waters.

First of a series of MPCA staff profiles. Kevin Stroom conducts research on streams and has published a report about Straight River.

Wastewater treatment and disposal are important for protecting and preserving Minnesota's water resources. MPCA regulates wastewater treatment activities in Minnesota.

Businesses like grocery, liquor, and convenience stores depend on refrigeration systems. Some of these systems, however, can prove expensive to operate and harmful to the environment.

Environmental information and resources for the automotive industry

Through this Minnesota climate smart food systems (CSFS) grant, the MPCA offered approximately $10 million in grant funding for projects that will expand Minnesota’s infrastructure capacity for composting source-separated organic materials (SSOM) with a focus on wasted food and food scraps.

The Watershed Pollutant Load Monitoring Network (WPLMN) is a partnership that collects data on water quality and flow in Minnesota.

The 2026 Climate Action Framework prioritizes reducing greenhouse gas emissions and protecting Minnesotans

Nitrogen management plans help operators of wastewater treatment facilities understand the inputs of nitrogen to their facilities and evaluate options that can reduce the amount of nitrogen discharged.

Standard operating procedures (SOPs) reflect how agency staff and contracted partners complete agency-funded field activities.

For more than 50 years, volunteers have gathered critically important water clarity data on Minnesota lakes and streams.

A series of new culverts in Lake County reconnect brook trout habitat and provide resilience to climate change for area roads.

The MPCA will analyze varying background sulfate levels across Minnesota, which could inform our implementation of the wild rice sulfate water quality standard.

MPCA is offering approximately $250,000 in grant funding to help Minnesota governments, businesses, institutions, and organizations address two specific needs: waste reduction/reuse and toxic products prevention.

Application fees must be submitted with your permit application. The submittal cover page form will help you add up the points assigned to each type of permit application or request. Multiply the…

What consumers should know about new Minnesota laws prohibiting PFAS in consumer products and the MPCA’s efforts to minimize PFAS pollution by keeping it out of commonly used household products.

What's in My Neighborhood provides a wide variety of environmental information about your community. Search for:properties that were previously contaminated and those being investigated for…

Environmental information for craft breweries, distilleries, wineries, and cideries, and for home brewers who want to start commercial production.

Requirements for discharges from a project site and/or management control site(s).

Permit applications must include detailed emissions calculations to help determine which permit type or permit amendment is needed.