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States are responsible for developing a Regional Haze State Implementation Plan (SIP) that addresses regional haze in each Class I area located within the state and in each Class I area located…
MPCA investigation found stormwater permit violations that occurred during a construction project in 2025, with sediment-laden stormwater entering a stream at a construction site in Chaska.
Study funded by the $850 million settlement that Minnesota reached with 3M in 2018 focused on the area served by the Valley Branch Watershed District’s Project 1007 rainwater conveyance system in the East Metro.
U.S. Steel Corp. operates the Minntac Taconite processing facility near the city of Mountain Iron, where it produces taconite pellets that are shipped for use at steel mills. U.S. Steel has applied for a reissued air permit so it can replace existing emissions controls in its pellet plant with cartridge filters.
Whether they are called sloughs, swamps, bogs, or potholes, these are all wetlands and they provide many environmental benefits and contribute to watershed health. Though Minnesota has lost almost half of its wetland acreage over time, the quality of the remaining wetlands is good overall.
The MPCA's chloride reduction program assists communities and organizations across Minnesota in identifying sources of chloride.
Minnesota has a new law that prohibits nonessential use of per- and polyfluoroalkyl substances (PFAS).
Excess phosphorus is harming Minnesota waters. Phosphorus comes from both regulated and non-regulated sources. A quarter of Minnesota lakes have high levels of phosphorus, which means that they do…
The MPCA offers environmental audits to help businesses and organizations examine how well they are complying with environmental regulations, and correct any problems that are identified.
Chloride is a problem for wastewater facilities and stormwater permittees.
Environmental information and permits that affect businesses using stationary engines or generators.
Healthy land and soil is essential for thriving Minnesota communities. It drives economic development and opportunity, improves our health, and contributes to clean water for drinking and recreation…
MPCA permits are required to both build and operate landfills in Minnesota.
Determine what type(s) of water quality permit is required at facilities that mine construction sand and gravel; industrial sand; quarry limestone, granite or dimension stone; operate hot mix asphalt production areas; produce concrete block, brick and other products; and/or produce ready-mix concrete.
Water scientists from the MPCA published four watershed reports in 2025, updating the data we need to keep Minnesota’s waters clean and protected.
MPCA evaluates water quality by measuring and monitoring the health of fish, macroinvertebrates, and plants.
Groundwater is not a static thing, but moves around in the layers of rock and soil beneath our feet. How does this affect the work to treat contaminated groundwater and protect drinking water?
To best serve the needs of all Minnesotans for healthy air, sustainable lands, clean water, and a better climate, the MPCA has committed to building a diverse, equitable, and inclusive workforce that…
U.S. Steel Corp. operates a taconite mine and processing plant known as Keetac north of Keewatin, where it produces taconite pellets for use at iron and steel mills.
Under the federal Clean Water Act, states must designate beneficial uses for all waters and develop water quality standards to protect each use.