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Wisconsin’s 2016 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 2016 list update, DNR proposes to add 225 new waters. A majority of the listing additions were waters that exceed total phosphorus criteria. A significant number of new listings were also based on poor biological condition. Ten waterbodies are proposed to be delisted.

Public informational webinar

A webinar was held November 2015 to provide information about the Clean Water Act regulatory framework for identifying and restoring impaired waters, process for developing Wisconsin’s impaired waters list, and the proposed listing updates.

Final 2016 impaired waters list materials

Final documents

The Impaired Waters Search Tool may be used to search DNR’s WATERS database for previous and current impaired waters listings, as well as listing update proposals. A help guide for using the search tool [PDF] is available.

The Surface Water Data Viewer can be used to search for impaired waters listings and proposed listings in an interactive mapping application. To view impaired waters on the map, click the “Show Layers” button to expand the “Impairments and Assessments” grouping and check the “Impaired Waters Status” layer. The definitions of the listing status categories are provided here.

Contact information
For information contact:
Impaired Waters Program

Last revised: Friday September 08 2017