Drinking Water

The water that you drink comes from either a public water system or a private well.

In Wisconsin, drinking water drinking water comes from either a lake or groundwater. Some Wisconsin communities Child holds a glass of wateralong Lake Superior, Lake Michigan, and Lake Winnebago use these lakes as their drinking water source.

About two-thirds of Wisconsin residents use groundwater as their drinking water source.

Groundwater is part of the water cycle. When it rains or when snow melts, water seeps into pores and cracks in the soil and is stored underground in aquifers. Aquifers are underground groupings of rock that allow water to move. They are not underground rivers or lakes. There are four major types of aquifers in Wisconsin.

Knowing about issues that can affect your drinking water’s quality is important for good health.

We have more information and resources for people that get their drinking water from a public water system and for people that get their water from a private well. We also have information on some common drinking water concerns and steps you can take to protect yourself and your family.


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Last Revised: April 22, 2021