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

Chemicals in the air toxics emission inventory.

The MPCA studies, monitors, and regulates water pollutants to protect human health and the environment. Minnesota water quality standards strives to protect water for use, measures health of waters, and guides limits on what regulated facilities can discharge to surface waters.

Application fees must be submitted with your permit application. The submittal cover page form will help you add up the points assigned to each type of permit application or request. Multiply the…

Water quality trading is a market-based approach to the protection and restoration of surface waters, another tool to be used in conjunction with existing voluntary, regulatory, and financial assistance programs.

Wood-fired boiler exceeded carbon monoxide limits multiple times during 2021 and 2022 and several emissions testing reports were submitted up to 300 days late.

USG Interiors in Cloquet exceeded nitrogen oxide emissions during the summer of 2022.

The MPCA uses the EQuIS database to store and manage monitoring data and associated laboratory results from streams, lakes, groundwater, ambient air, soil, sediment, and gas, collected through MPCA programs and partnerships.

Under the federal Clean Water Act, states must designate beneficial uses for all waters and develop water quality standards to protect each use.

State agencies, counties, municipalities, nonprofit organizations, and many others are engaged in protecting Minnesota lakes.

The MPCA works with city and county governments, watershed districts, consultants, and others on monitoring, protecting, and restoring water quality. This is a repository of guidance and technical…

Minnesota continues to reduce industrial and transportation air pollutants that have the highest potential health risks. Investment in clean air for all Minnesotans is a top priority for the MPCA and Governor Walz.

Minnesotans cherish their access to clean water. Protecting and restoring water quality is therefore one of the MPCA's core areas of focus. Through intensive water-quality monitoring, we protect…