Look up drinking water data
Learn about the quality of Wisconsin's drinking water.
Public water systems are required to monitor for substances in accordance with the federal Safe Drinking Water Act standards. If your residence is on a public water system you can view the system's drinking water sample results or obtain the consumer confidence report (also referred to as a water quality report) by contacting your municipality or visiting their website. You can also view results by contaminant.
Find Private well test results in the Groundwater Retrieval Network (GRN).
More private well testing data can be viewed using the Wisconsin Well Water Quality Viewer.