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

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

When temperatures climb, conditions are ripe for Minnesota lakes to produce algae blooms, some of which can be harmful to pets and humans.

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

Industrial Stormwater Steps to Compliance - Step 5: Gather application materials before applying, use the e-Service to apply or modify coverage

Dentists in Minnesota must meet federal and state requirements to limit the amount of mercury in their wastewater.

Riverview LLP is seeking to expand its existing West River Dairy facility near Morris from 7,855 cows to a total capacity of 18,855 cows.

Northern Iron operates an iron foundry in an environmental justice area in Saint Paul's Payne-Phalen neighborhood.

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

Best practices for SSTS installations drafted by St. Louis County, Minn., in 2008 based on the experiences of SSTS installers and inspectors.

Chloride is a problem for wastewater facilities and stormwater permittees.

Learn about environmental regulations that may apply to your business. It is not an exhaustive list, so other regulations may apply.

Minnesota businesses, organizations, and municipalities seeking or holding MPCA wastewater permits are charged two basic types of permit fees: application fees and annual fees.

Businesses with low levels of actual emissions can submit a simplified permit application and obtain a registration permit, with greater flexibility to make changes as long as they continue to maintain permit requirements.

Clean Water Fund dollars come from the Clean Water, Land and Legacy Amendment that Minnesotans approved in 2008.

With the end of the 2025 model year in the automobile industry, so ends Minnesota's Clean Cars rule.  The Clean Cars rule, adopted in 2020, had a goal of electric vehicles exceeding 6% of all…

Carbon monoxide (CO) is a product of the incomplete combustion of carbon-based fuels—including gasoline, diesel fuel, crude oil, and wood—and other natural and synthetic products. Breathing in…

Counties and solid waste management districts around the state are required to prepare and implement detailed plans for solid waste management.

MPCA investigation in 2025 found that Sheldahl Flexible Technologies submitted incorrect permit applications and failed to obtain MPCA approval prior to installing or modifying three pieces of industrial mixing equipment.

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