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Minnesota’s 24-Hour Nitrate Network generates publicly available water quality data on nitrate levels in our surface water.

The northeast region of Minnesota is home to the state’s metallic mining industry. The "Iron Range" has a history of iron ore (“ferrous”) mining dating back to the late 1800s and includes the large…

MPCA evaluates water quality by measuring and monitoring the health of fish, macroinvertebrates, and plants.

Finding ways to keep stormwater on land and let it soak into the ground can lessen the negative effects on water quality from stormwater.

Findings are the result of state, local and international partners working together to better understand and address excessive algae blooms in this iconic lake.

A new planning effort in northwest Minnesota takes a basin-wide approach to reducing the state's phosphorous contributions to the Red River, and to Canada's Lake Winnipeg.

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.

An index of biological integrity (IBI) is a particularly powerful tool that provides an accurate measure of the condition of the biological communities and are a direct determinant of the attainment of aquatic life uses.

The MPCA's regulatory, cleanup, and monitoring programs create and maintain spatial data that serve our environmental protection work and can be shared with partners and researchers.

The Clearwater River watershed drains an area of 886,600 acres in the Red River of the North basin. The river flows to the northwest and southwest, eventually emptying into Red Lake River near Red Lake Falls.

To help you quickly determine whether this permit affects you, what your requirements are, and what to do next, the MPCA has developed an Applicability flow chart