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The MPCA has important roles in protecting and restoring waters in degraded conditions.

The Minnesota Pollution Control Agency (MPCA) does not discriminate on the basis of race, color, national origin, disability, age, or sex in administration of its programs or activities, and, MPCA does not intimidate or retaliate against any individual or group because they have exercised their rights to participate in actions protected, or oppose actions prohibited, by 40 C.F.R. Parts 5 and 7, or for the purpose of interfering with such rights.

Every two years, MPCA creates a list of impaired waters in the state that do not meet water quality standards.

The Clean Water Act established the framework for creating water quality standards and continues to help us protect Minnesota's prized lakes and rivers.

It's Septic Smart Week and Minnesota local governments are reporting significant progress in fixing inadequate septic systems around the state.

Minnesota state agencies are working together to reduce greenhouse gas emissions that cause climate change.

The MPCA proposes adding 46 new impaired bodies of water and removing 45 impairments from bodies of water from the IWL, the most removals in a two-year cycle since the state began the IWL program in 1992.

Planned amendments to Minn. Rules ch. 7050 affect the Class 1 beneficial use, which protects waters (both surface and groundwater) used as a source for domestic consumption.

Nitrogen, like phosphorus, is a nutrient that pollutes in state waters, and its concentration in many rivers has been increasing from historic natural levels over time due to human influences.…

The Rainy River - Headwaters Watershed covers nearly 1.9 million acres, starting in northern Cook and Lake Counties and flowing west/northwesterly into St. Louis County and the Canadian border waters.

Trichloroethylene and perchloroethylene have contaminated groundwater and caused vapor intrusion issues at this site.

Standard operating procedures (SOPs) reflect how agency staff and contracted partners complete agency-funded field activities.

The MPCA has released the draft 2025 Minnesota Nutrient Reduction Strategy for public review and comment.

Nearly all feedlot owners are required to register with the state and update their registration information every four years, unless they have applied for a permit recently. This page includes information about how to register.

The MPCA works with industry, government, and residents to reduce and manage waste.

MPCA rules govern how septic systems are designed, installed, and managed.

Ask the MPCA features questions Minnesotans have asked us, on the issues the agency works on, from waste disposal, water and air quality, and chemicals in products to recycling and reuse,…

Chloride is a problem for wastewater facilities and stormwater permittees.

Volunteer-collected data are regularly used in decision-making and conservation efforts. Find a program that excites you and join in.

Pig’s Eye Dump in Saint Paul has been slated for cleanup and restoration.