Skip to main content

The quality of Wisconsin's drinking water

What you need to know

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.

Current topics

Learn about 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 helped facilitate a workgroup to assess drinking water and groundwater issues.