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Real bottom feeders: How removing carp can improve water quality

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

How one Minnesota community came together and restored a beloved trout stream

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.

Storage tanks

The MPCA regulates both underground and aboveground commercial storage tanks above a certain size that hold petroleum or hazardous liquids.

Ozone

Ground-level ozone is a secondary pollutant formed through chemical reactions between nitrogen oxides (NOx) and volatile organic compounds (VOCs). Ozone can irritate the eyes, nose and throat,…

Here, fishy, fishy: What counting fish can reveal about stream health

MPCA's fish sampling process and why we do it

Mississippi River - Lake Pepin

The Mississippi River - Lake Pepin Watershed includes 205,747 acres that drain several small, coldwater streams in bedrock-dominated bluff country.

Steps to construction

Owners/operators of construction activity must complete several steps before completing a permit application and beginning construction. These steps also help owners/operators determine their eligibility for coverage under the general permit.