Minnesota’s Impaired Waters List

Every two years, MPCA creates a list of impaired waters that do not meet water quality standards. Learn more: Defining impaired waters.

Stay informed. Have questions or need assistance? Sign up for updates or contact Miranda Nichols, 651-757-2614 or 800-657-3864 toll free.

Draft 2020 Impaired Waters List

File Draft 2020 Impaired Waters List (wq-iw1-65)

PDF icon 2020 Guidance Manual for Assessing the Quality of Minnesota Surface Waters for Determination of Impairment 305(b) Report and 303(d) List (wq-iw1-04k)

Describes Minnesota's monitoring and assessment strategy, assessment tools, and the redesigned assessment process. The purpose of this guidance is to define the required data and information and lay out the criteria by which waterbodies are assessed to determine if beneficial uses are supported.

Comments invited

The public may submit comments on both the draft 2020 Impaired Waters List and Assessment Guidance Manual from Tuesday, November 12, 2019, through January 14, 2020, at 4:30 p.m.

All comments received during that period, and agency responses, will be forwarded to EPA, along with the proposed list and accompanying documentation, for their review and approval. Submit written comments to miranda.nichols@state.mn.us or Miranda Nichols, Minnesota Pollution Control Agency, 520 Lafayette Rd N, St. Paul, MN 55155 (must provide a return address).

See the Impaired Waters Viewer (IWAV) for all impaired waters, including those just listed, delisted, and corrected for the new list.

Public meetings

The MPCA will hold four public meetings to discuss the content of the 2020 Impaired Waters List with special focus on waters assessed in the region in the last two years. You can attend in person at an MPCA office or venue listed below, or participate from your home or office by clicking on a link below at the time of the meeting. Meetings will be recorded and posted here afterward for viewing. Contact Miranda Nichols for additional information.

Central: December 11 (10 a.m.)

Brainerd MPCA, 7678 College Rd, Suite 105, Baxter, MN 56425

File Webex: December 11 (10 a.m.)

Meeting number (access code): 964 052 022; Meeting password: JcdcZw4S
Join by phone: 415-655-0003

West: December 12 (9 a.m.)

  • Marshall MPCA, 504 Fairgrounds Rd Suite 200 Marshall, MN 56258
  • Detroit Lakes MPCA, 714 Lake Ave, Suite 220, Detroit Lakes, MN 56501
  • Mankato MPCA, 12 Civic Center Plaza, Suite 2165, Mankato, MN 56001

File Webex: December 12 (9 a.m.)

Meeting number (access code): 961 734 616; Meeting password: WyT2Y7x2
Join by phone: 415-655-0003

North: December 17 (1 p.m.)

  • Falls International Airport, Conference Room, 3214 2nd Ave E, International Falls, MN 56649
  • Duluth MPCA, 525 Lake Ave, Suite 400, Duluth, MN 55802

File Webex: December 17 (1 p.m.)

Meeting number (access code): 965 278 342; Meeting password: J7AhgfxP
Join by phone: 415-655-0003

Metro: December 19 (1 p.m.)

  • St. Paul MPCA, 520 Lafayette Rd N, St. Paul, MN 55155
  • Rochester MPCA, 18 Wood Lake Drive SE, Rochester, MN 55904

File Webex: December 19 (1 p.m.)

Meeting number (access code): 968 910 929, Meeting password: zZMapXp8
Join by phone: 415-655-0003