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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

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

Create an editable spreadsheet with the information indicated below. Each step in your calculations needs to be clear and easy to follow.Facility informationProvide the facility ID, file number, and…

Information about the work to clean up the pollution from over 100 years of unregulated development and industrial practices.

A cumulative impacts analysis provides a comprehensive look at all burdens that affect a community or neighborhood.

The MPCA completed 68 enforcement cases for water quality, air quality, hazardous waste, stormwater, and wastewater violations in the first half of 2025.

“Area C” is the name given to Ford Motor Company’s former industrial waste dump on the floodplain of the Mississippi River, at the base of the bluff below the former Twin Cities Assembly Plant in Saint Paul.

A water quality variance is a temporary change in a state's water quality standard for a specific pollutant and its relevant criteria, allowing deviation from meeting a water quality-based effluent limit for a particular discharger.