Michigan well and pump records can reveal much about the geology of your home site

If you have a private drinking water well, your Water Well and Pump Record can help you understand what potential drinking water contaminants may exist in your area.

Many Michigan residents depend on groundwater as a source of clean, drinking water. In certain places in Michigan, bedrock is close to the surface. In these areas, drinking water is obtained by drilling into the bedrock to obtain water that is stored in the cracks and spaces within the bedrock. In other parts of the state, there are layers of soil of various thicknesses over the bedrock, called glacial drift. Drinking water in these areas comes from wells dug into those layers.

The geology of a site helps to determine whether water and contaminants are more likely to filter into the ground or move across it as storm water.

Well and Pump Record

Photo used with permission from MDEQ

Consider how two different sites can protect or harm groundwater and surface water:

If you have a private drinking water well, you can learn more about the geology of your land by reading your well log. Well logs are available online (see below) or from your local health department and give a rough idea of the geology of a site. They indicate the type, thickness and depth of the layers the contractor drilled through to reach water. Water well drilling and pump installation contractors have been required to file logs for drinking water wells they have drilled in Michigan since 1967.

You can find Michigan well and pump records on several websites:

For further information regarding the above websites, please email the Wllogic Help at .(JavaScript must be enabled to view this email address).

Private drinking water well owners should test their water at least once a year to ensure it is safe to drink. For more information on water testing, read the Michigan State University Extension article, “Protecting the water quality of your water well.”