Identifying and Restoring Wisconsin's Impaired Waters

Section 303(d) of the federal Clean Water Act requires states to develop a list of impaired waters, commonly referred to as the "303(d) list". A water body is considered impaired if:

1. the current water quality does not meet the numeric or narrative criteria in a water quality standard, or
2. the designated use that is described in Wisconsin Administrative Code is not being achieved

1996 Impaired Waters List

In 1996, the WDNR submitted its first impaired waters list to the USEPA.

Approved 1996 List [PDF 756KB].