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The quality of Wisconsin's drinking waterWhat you need to know

about the quality of Wisconsin’s drinking water.
your home’s well annually.
information on Kewaunee County, manure issues, groundwater workgroup and more.
about lead and drinking water issues.

Safe, clean drinking water is what we expect when we turn on our faucets. The Wisconsin DNR works to protect the quality and quantity of the state’s water resources and ensure the safety of drinking water. We're here to help you be better informed consumers when it comes to your drinking water.

Identify your water's symptoms

Drinking water quality: What you need to know.

Current topics

Learn about current drinking water topics and resources available from DNR.

Drinking water

Learn about activities that affect the safety, quality and availability of drinking water.


About one-quarter of Wisconsin’s population drinks water drawn from over 800,000 private wells.

Groundwater workgroup

DNR is helping facilitate a workgroup to assess drinking water and groundwater issues.

Last revised: Tuesday June 28 2016