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Resources and guidance for TMDL projects in Minnesota.

Volunteer water monitors collect valuable data used by agencies and organizations across the state to protect and manage Minnesota’s waters.

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.

In addition to the vessel requirements in the EPA VGP and Minnesota’s ballast water general permit, vessels must follow the requirements in Minnesota Statutes and Minnesota’s 401 certification of the VGP.

The St. Louis River Mercury TMDL will determine mercury reductions needed for lakes and rivers in the St. Louis River watershed.

A TMDL addressing excess bacteria in 22 stream reaches and protection strategies for 29 stream and river reaches in the Upper Mississippi River watershed.

Residential wood burning has been increasing in Minnesota, both for home heating and recreation.

Minnesota rivers are shrinking in the drought; some have their lowest flows in decades. What will be the long term effects?

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

The MPCA plans to amend water quality standards (Minn. Rules chapter 7050) affecting Class 2 beneficial uses, which protect surface waters for aquatic life and recreation.

Thanks to years of restoration efforts, the MPCA confirmed the Kabekona River meets water quality standards for recreation and proposed its removal from the 2026 impaired waters list.

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

Volunteer-collected data are regularly used in decision-making and conservation efforts. Find a program that excites you and join in.

A project to address excess sediment and turbidity in the Mississippi River, from Fort Snelling at St. Paul to upper Lake Pepin at Red Wing, based on a site-specific standard developed by the MPCA and Wisconsin Department of Natural Resources.

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.

MPCA staff studied the river during this summer's extreme drought conditions to see if tighter limits on phosphorus are protecting aquatic life.

The Minnesota Nutrient Reduction Strategy (NRS) compiles the latest science, research, and data and recommends the most effective strategies to reduce nutrients in our waters from both point and nonpoint sources.

The MPCA developed the Wastewater Nitrogen Reduction and Implementation Strategy to decrease the wastewater sector’s nitrogen loads for the protection and restoration of bodies of water in and downstream of Minnesota.

The health of Minnesota's large rivers is a reflection of how well we are protecting overall water quality.

This Winnebago River consists of a stream and lake system in southern Minnesota that flows into Iowa. The water resources here face several water quality challenges, including high nutrient and bacteria levels.