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The MPCA administers programs that are governed by 45 chapters of rules. The MPCA periodically conducts a “housekeeping” rulemaking to make minor corrections and clarifications to the rules or to repeal rules that have become obsolete.

States are responsible for developing a Regional Haze State Implementation Plan (SIP) that addresses regional haze in each Class I area located within the state and in each Class I area located…

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

Residential- and high-strength wastewater products registered for use in Minnesota, including the manufacturer's name, a link to the company's web site, and the registered product's name and model.

Stakeholders affected by the Minnesota Electronics Recycling Act must be registered with the MPCA.

Status of total maximum daily load (TMDL) projects in Minnesota.

The Mississippi River - Lake Pepin Watershed includes 205,747 acres that drain several small, coldwater streams in bedrock-dominated bluff country.

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.