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Environmental information and permits that affect hot mix asphalt plants.
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.
The St. Louis River Mercury TMDL will determine mercury reductions needed for lakes and rivers in the St. Louis River watershed.
Lake of the Woods is a big lake with a big problem caused by one of nature’s smallest organisms: algae. Scientists from the MPCA and the Science Museum are working together to understand why.
The MPCA is collaborating with many federal, Tribal, state, and local partners to clean up contaminated sites in the Duluth harbor and St. Louis River.
The Red Lake River Watershed, which covers 909,024 acres, is part of the Red River Basin in northwestern Minnesota. The Red Lake River begins its course in Beltrami County at Lower Red Lake.
A TMDL to address E. coli aquatic recreation impairments in five main-stem reaches of the Minnesota River.
MPCA's recommended review criteria for wastewater treatment facilities that need to perform system maintenance that requires approval to bypass untreated or partially treated domestic wastewater.
To make electric school buses more affordable to school districts, the MPCA started a grant program that puts more of the cleaner buses on routes across the state.
Minnesota’s air currently meets all federal air quality standards. However, even levels of air pollution below the standards can affect people’s health, including levels currently found in parts of Minnesota.
Tools to help small businesses determine if they need an air emissions permit and/or track compliance with their current air emissions permit.
Image Climate change is having a profound impact on Minnesota's natural environment. Many of our state's iconic native plants and animals — from birch…
The MPCA’s Smart Salting program helps cut down on chloride pollution by training snowplow drivers and municipalities to use less salt on the roadways.
In Minnesota, wastewater treatment operators must be certified to ensure that facilities meet operational requirements.
Image Climate change continues to have a destructive impact on Minnesota’s infrastructure, presenting a direct threat to our homes, businesses, roads…
As Minnesotans prepare for another summer of outdoor activities, MPCA meteorologists are forecasting a moderately active air quality season.
1,4-dioxane was mainly used as a stabilizer for chlorinated solvent 1,1,1-trichloroethane. 1,4-dioxane can also be an unintended contaminant in the production of certain products, including some…
The MPCA is investigating the source of the chemical 1,4-dioxane in private wells in Gem Lake.
The discharges in summer 2024 happened during the construction of the MnDOT truck facility in Eden Prairie, Minnesota.
Are pets affected by poor air quality? Will wearing a mask help when I’m outside? What is particulate pollution? We’ve got the answers.