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WDNR Shallow Private Wells PFAS Study Findings

WDNR Shallow Private Wells PFAS Study Findings

In the summer and fall of 2022, the Wisconsin Department of Natural Resource’s (WDNR’s) Drinking Water and Groundwater Program partnered with the University of Wisconsin-Stevens Point (UWSP) and the Wisconsin State Laboratory of Hygiene (WSLH) to collect 450 water samples from residences with shallow private wells across Wisconsin and test them for 44 PFAS compounds as well as other organic and inorganic compounds.

Some key take aways from the findings are:

  • Various forms of PFAS were detected in 71% of the 450 wells sampled
  • Very few (about 1%) of the sampled wells showed PFAS levels above Wisconsin Department of Health Services (WDHS) health guidance levels
  • Very few (about 4%) of the sampled wells showed PFAS levels above proposed EPA regulatory levels
  • Understanding correlation between higher PFAS levels and potential sources needs further research

A full report of the WDNR’s study can be found here.

It’s important to note that the drinking water provided by the Central Brown County Water Authority is sourced from Lake Michigan and PFAS testing results show that it is below both the WDHS health guidance levels and the proposed Environmental Protection Agency (EPA) regulatory levels.

The results from the Water Authority's sampling can be found here on this website.

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