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Per- and polyfluoroalkyl substances (PFAS) are a group of thousands of human-made chemicals that do not break down over time. PFAS are sometimes called “forever chemicals” due to their extreme…

Removing Middle Lake from the impaired waters list required wrangling with a bottom feeder, the invasive carp.

Application forms and instructions for applying for wastewater permits.

In rules, an incorporation by reference states that the contents of another document are part of the rule, even though the text of the referenced document does not appear in the rule itself.

The Thief River begins its course in Marshall County at Thief Lake, flowing south/southwest to converge with the Red Lake River.

The Mississippi River - Sartell Watershed covers approximately 652,800 acres (1,020 sq. miles) in the central part of the Upper Mississippi River Basin. The watershed includes parts of Benton, Crow Wing, Mille Lacs, Morrison, Stearns, and Todd counties.

The Blue Earth River begins in northern Iowa and meets with the West Branch Blue Earth River in Faribault County. The watershed includes parts of eight counties in southern Minnesota and four in northern Iowa.

The MPCA issued a new air quality permit for this manufacturing facility in White Bear Township.

The MPCA added three bodies of water to the impaired waters list for PFAS contamination. Which are they? How did they get polluted? And how much PFAS does it take to contaminate a body of water?

Guidance for submitting data to MPCA Remediation Division programs: Superfund, Site Assessment, Petroleum Remediation, Brownfields, RCRA Remediation, Closed Landfill, and Integrated Remediation.

Initial screening information for a contaminant of emerging concern, perfluorooctane sulfonate.

The Watershed Pollutant Load Monitoring Network (WPLMN) is a partnership that collects data on water quality and flow in Minnesota.

Proposed changes to permits that regulate the state’s largest animal feedlots target nitrate pollution statewide.

The Lower Red River Watershed (also known as the Red River of the North - Tamarac River) drains an area of 281,000 acres, including parts of Kittson, Marshall, and Roseau counties.

The Red River of the North - Grand Marais Creek Watershed covers 298,264 acres and is part of the Red River Basin in northwestern Minnesota and southeastern North Dakota.

The MPCA monitors water quality in rivers and streams is several different ways around the state.

Initial screening information for a contaminant of emerging concern, fluoxetine.

Kohlman Lake, one of 27 bodies of water to come off the impaired waters list this year, did so with substantial help from the Clean Water Fund.

A project to address high levels of suspended sediment in the Minnesota River and the South Metro portion of the Mississippi River.

MPCA guidance for evaluating when closed landfills may exit the postclosure care phase.