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The MPCA completed 78 enforcement cases for water quality, air quality, waste, stormwater, and wastewater violations in the second half of 2025, for a total of 146 for the year.

Minnesota is a national leader in keeping mercury out of the environment.

The Rapid River watershed covers 573,060 acres in northern Minnesota. Over 79% of the land in the watershed is owned or managed by state entities.

The MPCA regulates both underground and aboveground commercial storage tanks above a certain size that hold petroleum or hazardous liquids.

Partnerships and diversified funding drive the work to restore water quality in impaired streams in the Red Lake River Watershed through science-based interventions.

Planned amendments to Minn. Rules ch. 7050 affect the Class 1 beneficial use, which protects waters (both surface and groundwater) used as a source for domestic consumption.

A training and certification program for evaluating aquatic life in Minnesota’s rivers and streams.

Through a certificate of need process, MPCA is offering existing landfills the opportunity to expand their existing capacity.

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.

MPCA permits are required for construction, modification, and operation of facilities where solid waste is treated, stored, processed, transferred, or disposed.

MPCA's compliance and enforcement program tracks how well wastewater treatment facilities are complying with their permits and takes enforcement actions when necessary.

A watershed is the area of land where all of the water that drains off of it goes into the same place — a river, stream or lake.

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

Tools and materials for partners and stakeholders interested in minimizing the impact of chloride on Minnesota lakes, rivers, and groundwater.

The Clean Water Council was created to advise the Legislature and the governor on the administration and implementation of the 2006 Clean Water Legacy Act

Green and safer product chemistry is formulating or designing a new product (or reformulating an existing one) to reduce harmful environmental, workplace, human health, and energy use effects over the product's entire life cycle.

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

Image Aboveground storage tank (AST) requirements are found in Minnesota Rules, Chapter 7151. In general:new tanks and piping must be designed to…

Chemicals in the air toxics emission inventory.

Nitrogen, like phosphorus, is a nutrient that pollutes in state waters, and its concentration in many rivers has been increasing from historic natural levels over time due to human influences.…