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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.

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

AccessibilityThe Minnesota Pollution Control Agency is committed to accessibility on its website. As part of that commitment, the MPCA makes every effort to comply with the State of Minnesota…

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.

The MPCA 401 certification fills a unique niche in protecting water quality by applying state water quality standards to projects.

In Minnesota, wastewater treatment operators must be certified to ensure that facilities meet operational requirements.

A water quality variance is a temporary change in a state's water quality standard for a specific pollutant and its relevant criteria, allowing deviation from meeting a water quality-based effluent limit for a particular discharger.

Status of total maximum daily load (TMDL) projects in Minnesota.