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The Rapid River watershed covers 573,060 acres in northern Minnesota. Over 79% of the land in the watershed is owned or managed by state entities.

Minnesotans are encouraged to share feedback through Nov. 9, 2025

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.

MPCA rules govern how septic systems are designed, installed, and managed in Minnesota.

Training resources for feedlot officers in Minnesota.

Find sustainable products for your business with these helpful certification and labeling systems.

Findings underscore need to reduce use of “forever chemicals”

Wastewater treatment and disposal are important for protecting and preserving Minnesota's water resources. MPCA regulates wastewater treatment activities in Minnesota.

Air pollution levels in Minnesota have steadily decreased over the past few decades and currently meet federal standards. But even levels that meet or are below these standards can affect people’s…

Groundwater is the source of drinking water for about 75% of all Minnesotans and provides almost all of the water used to irrigate crops. Its purity and availability is critical to the health of the state.

Two small creeks in the Nemadji River watershed are cleaner, and some fish have returned, after restoration work that the MPCA took part in.

The U.S. EPA has awarded Minnesota $200 million to cut climate pollution from our state’s food systems through the Climate Pollution Reduction Grants program.

Karst near Oxbow Park and Zollman Zoo, host of the We Are Water MN traveling exhibit. Phil George, who lives in rural Byron, Minnesota, has always felt a deep…

Any facility that is engaged in a narrative activity or a primary SIC code, as listed in the Multi-Sector General Permit, needs to apply for industrial stormwater permit coverage or certify for No Exposure.

The MPCA has developed best practices for vapor intrusion mitigation and public communication work used by the agencies and our contractors.

Pesticide NPDES permit steps to compliance Step 4: Report adverse pesticide incidents

Eight cities will receive grants to create plans that will protect homes and businesses from flooding and other climate impacts

Austin's municipal wastewater treatment plant discharged ammonia and fecal coliform over permitted limits into the Cedar River.

The MPCA provides additional guidance on air permitting and regulation requirements: New source review – Obtain a permit before beginning construction on new major-emitting industrial facilities…

Septic tanks must be registered in Minnesota to ensure they are watertight and have adequate structural integrity.