Look up groundwater data
To learn about the likely quantity and quality of groundwater in a geographic area, you’ll want to find data from several sources.
Groundwater quality and basic well parameters
Groundwater quality and basic well parameters can be found in the Groundwater Retrieval Network (GRN).
Local well testing data can be viewed using the Wisconsin Well Water Quality Viewer.
Well construction information
Well construction information, including geology and construction method may be helpful. Use the following links to locate reports on wells that have been constructed across Wisconsin.
- Well construction reports on file from years prior to 1988
- Well construction reports on file since 1988
- High capacity wells in your location of interest (We are in the process of updating our high capacity well inventory database and online queries are currently unavailable. Please contact the water use section at 608-266-2299 or DNRWATERUSEREGISTRATION@wisconsin.gov for your data inquiries.)
- Well construction reports and detailed well logs available in other formats (e.g., CD) from the Wisconsin Geologic and Natural History Survey
- Well abandonment reports often explain the reason for abandonment.
Groundwater levels measured in approximately 120 wells throughout Wisconsin, are available at the USGS web site:
Potential contamination sources
Potential contamination sources, including spill or remediation sites:
Additional groundwater data and analyses
Additional groundwater data and analyses available from:
- Wisconsin Geologic and Natural History Survey
- U.S. Geological Survey Wisconsin Water Science Center
- UW’s Wisconsin Water Library
- Central Wisconsin Groundwater Center
Site-specific file information
Site-specific file information may be available in DNR files for high capacity wells and similar large wells requiring state permits. To request records for individual wells by unique well number, contact Deb Lyons-Roehl by email or by letter at Department of Natural Resources, 101 South Webster Street, Madison, WI 53707. A well record security agreement will be required prior to receiving individual well records.
We are happy to provide file information about wells in a location of interest (e.g., for property evaluation, due diligence or project design). Identification of wells in a location of interest is best done by you or others with information about the nature of the parcel or the scope of the potential project. To ensure complete data on which to base your site assessment, we recommend you search the on-line data systems described above using appropriate location parameters to identify specific wells for which we may then be able to provide additional file information.