2016 Impaired Waters List

The proposed 2016 Impaired Waters List, along with supporting documentation, was sent to the U.S. EPA for approval on January 4, 2017. The list will remain "proposed" until EPA approves it as "final."

Office spreadsheet icon 2016 Proposed Impaired Waters List (wq-iw1-55) — updated December 27, 2016

The Proposed 2016 Impaired Waters List consists of:

  • Proposed 2016 TMDL (303(d)) List
  • Proposed 2016 Inventory of All Impaired Waters
  • Proposed Appendix A of the Statewide Mercury TMDL (Impairments added to the TMDL; for more information see the Statewide Mercury TMDL web page.)
  • Plus:
    • A summary of impairments
    • What’s new and what’s changed since the 2014 List
    • Informational tabs to help you interpret the document

PDF icon 2016 Guidance Manual for Assessing the Quality of Minnesota Surface Waters for Determination of Impairment 305(b) Report and 303(d) List (wq-iw1-04i) - updated December 27, 2016

The guidance manual 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.

Note: The MPCA has not finalized methods for identifying waters used for production of wild rice or for assessing impairment of waters based on a wild rice-related standard. Consequently, the draft 2016 303(d) Impaired Waters List does not include any waters assessed as impaired for the sulfate wild rice standard. The MPCA is in the midst of an effort to refine the existing sulfate standard to protect wild rice that will lead to needed methods for identification and assessment.

Public comments

A formal public comment period (Aug. 1 – Sept. 30, 2016) was published in the State Register.

PDF icon Comments on draft 2016 impaired waters list (wq-iw1-55f)

PDF icon MPCA responses to comments on the Draft 2016 Impaired Waters List (wq-iw1-55g)

Other information