The Illinois State Geological Survey (ISGS) is the official repository for the records of existing wells that have been drilled in the state of Illinois. With records for over 700,000 wells, the interactive water wells map allows users to explore a range of information including the location, depth, and bedrock topography for all recorded wells in Illinois. Data for water and related wells exists for private water wells, engineering borings, and stratigraphic borings.
In addition to wells, the map also includes information on karst areas, aquifers, and drift thickness in the state.
Click here to explore the ISGS interactive map of water and related wells in Illinois.
Source: Illinois State Geological Survey