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Wisconsin’s Source Water Assessment Program

Source water assessments are documents produced by DNR staff during the period between 1999 and 2003 intended to provide basic information to public water suppliers regarding:

  • where their drinking water comes from
  • the degree to which it may be impacted by potential sources of contamination.

Source water assessments include the following:

  1. a brief description of Wisconsin’s Source Water Assessment Program;
  2. a map of the system’s source water assessment area(s) and the potential contaminant sources within those area(s);
  3. a susceptibility determination based on presence of potential contaminant sources and other factors such as well construction, intake location and geology; and
  4. recommendations for source water protection

Source water assessments for water systems using groundwater are no longer available because the data they were based on is longer current.

Source water assessments for water systems using surface water are still available because much of the information is still current. Recognize that these assessments were produced between 1999 and 2003 so not everything is current.

Surface water systems where assessments are available include:

Photo of potential contaminants inventory

Example of an area–wide potential contaminant source inventory.

All States were required to complete source water assessments for both groundwater and surface water supplied systems as a result of the 1996 Amendments to the Safe Drinking Water Act.

Last revised: Thursday August 04 2016