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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.

The Mississippi River - La Crescent Watershed drains 95 square miles in Houston and southeast Winona counties, an area defined by wooded bluffs and spring-fed cold-water streams that flow directly to the Mississippi River.

The MPCA is seeking public comment on a proposed increase in the amount and types of waste that Curbside Waste Inc. processes at its transfer station facility in Dayton.

Based on volume, construction and demolition debris presents a big opportunity for reducing waste and its environmental effects.

Dem-Con is proposing a new facility that will process organic materials through anaerobic digesters at its environmental campus in Shakopee. The project requires an environmental assessment worksheet (EAW) and an air permit from the MPCA.

Organizations that want to reuse materials in ways not classified as standing beneficial uses must apply to the MPCA for a case specific beneficial use.

The MPCA has adopted amended rules relating to when maintenance of a closed landfill should end.

Systems to treat drinking water have been installed to address groundwater contamination in two St. Louis Park and three Edina municipal wells.

Wood waste from trees in the Twin Cities and other urban areas in Minnesota is a growing problem and highlights the need for more efforts to make use of this urban wood.

The MPCA proposes to adopt the U.S. EPA's 2013 national recommended water quality criteria for ammonia as its Class 2 ammonia water quality standards for the protection of aquatic life.

MPCA collects information about the sale and use of greenhouse gases with high global warming potential.

After many years of investigation, design work and construction, the Great Lakes Legacy Act remediation projects at these sites near Duluth, Minnesota, are complete.

Forms and guidance for local partners submitting surface water data, QA/QC information and progress reports to MPCA.

Minnesotans are encouraged to share feedback through Nov. 9, 2025

Demonstration/research projects (DRPs) allow permittees to explore potential beneficial uses or new methods of solid waste management through a limited-scale project.

The U.S. EPA approved Minnesota's Statewide Mercury Total Maximum Daily Load study in March 2007.

Recyclers of CED must register with the MPCA; there is no annual fee. Recyclers must meet certain requirements in terms of regulatory compliance, necessary licensure, and insurance.

Counties and solid waste management districts around the state are required to prepare and implement detailed plans for solid waste management.

A TMDL to address E. coli aquatic recreation impairments in five main-stem reaches of the Minnesota River.

The MPCA studies Minnesota's solid waste composition and processes to inform policy recommendations, legislative proposals, education and outreach messages, and waste reduction efforts.