The Wisconsin Department of Natural Resources' Water Condition Viewer provides a huge amount of information on water quality in Wisconsin. The map includes:

• Streams and lakes that have been or are being evaluated or monitored
• Data relevant to the Clean Water Act, including ecological data, phosphorus and chloride levels, temperature, E. coli, and chlorophyll
• Impaired waters
• Total maximum daily load (TMDL) categories
• Monitoring projects, sites, and data
• Planning information for statewide and local water quality management plans and projects
• Current and proposed management actions (designated uses, citizen monitoring, remediation, and much more)
• Watersheds, basins, streams, lakes, wetlands, and soils

Users can click on specific monitoring sites to download data and reports for further use.

Click here to access the interactive map.

Source: Wisconsin Department of Natural Resources