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)
  • 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.)
  • Extras: A summary of impairments; What’s new and what’s changed since the 2014 list; informational tabs to help you interpret the document. (last updated 12/27/2016)

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)

Describes Minnesota's monitoring and assessment strategy, assessment tools, and the redesigned assessment process. This guidance defines the required data and information and lays out the criteria by which waterbodies are assessed to determine if beneficial uses are supported. (Last updated 12/27/2016)

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.