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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 Upper Iowa River is a 156-mile-long tributary of the Mississippi River that rises in Mower County in southeastern Minnesota near the Iowa border. It then flows south through three Iowa counties before flowing into the Mississippi. It drains nearly 641,000 acres (1,005 square miles).

Improving water quality in Lake George has required treating phosphorus in the water and filtering pollutants out of urban stormwater.

The Wild Rice River begins its course at Mud Lake in Minnesota's Clearwater County, and flows largely to the west through Norman and Mahnomen counties.

Located in south-central Minnesota, the Le Sueur River flows 111 miles through a gently rolling landscape, most of it farmland, until it cuts down through high bluffs to the Blue Earth River.

In karst landscapes, the distinction between groundwater and surface water is blurry.

BMPs required to manage the slurry to comply with Minnesota statute and agency rules to protect water quality.

Enbridge Energy is continuing restoration work around its new Line 3 crude oil pipeline across Minnesota. The new line replaces an aging Line 3 and began operating in October 2021, after Enbridge completed the project’s construction phase.

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

The time that Andy Vig spends along the Minnesota River near Hoċokata Ṫi, cultural center of the Shakopee Mdewakanton Sioux Community, serves as a reminder of where his water comes from and a…

Smart technology, conservation practices, and a commitment to clean water help this family dairy and crop operation thrive — while protecting rivers, streams, and future generations.

The MPCA is authorized to develop numeric water quality criteria that apply specifically to a water body or region where the pollutant is found, using data from that water body or region.

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.

Chloride is a problem for wastewater facilities and stormwater permittees.

Designing stormwater systems to handle the challenges of climate change differs in every community across the state. Here’s how one community is meeting that challenge

The MPCA and its many partners collect a wide variety of data on environmental conditions and pollution sources.

Minnesota has revised state water quality standards to incorporate a tiered aquatic life use (TALU) framework for rivers and streams.

The South Fork Crow River Watershed covers 818,428 acres. It is located in south-central Minnesota and encompasses parts of Kandiyohi, Renville, Meeker, McLeod, Sibley, Wright, Carver, and Hennepin counties.

The MPCA completed 75 enforcement cases for water quality, air quality, waste, stormwater, and wastewater violations in the second half of 2024.

Smart Salting is a suite of techniques that minimize the environmental and economic impacts of chloride while still meeting public needs.