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Wisconsin's 2018 impaired waters list

Every two years, Section 303(d) of the Clean Water Act requires states to publish a list of all waters that are not meeting water quality standards. In the proposed 2018 list update, DNR proposes to add 242 new waterbody segments. A majority of the listing additions were waters that exceed total phosphorus criteria. Thirty-five waterbodies are proposed to be delisted.

A 30-day public comment period was held November 2017 through January 2018. The final documents are listed below. Additional information can be viewed on the 2018 Water Quality Report to Congress page.

Final 2018 impaired waters list materials

Final documents

Data viewing tools


Last revised: Thursday November 15 2018