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University Library, University of Illinois at Urbana-Champaign

Illinois Water Supply Information: Home

This guide is intended to help citizens of Illinois find information about Illinois water supplies. It includes information resources from the state and federal government, news sources, and library holdings, including digital collections.


Water supply for Illinois comes from a variety of sources including surface waters (e.g., rivers, lakes, reservoirs), groundwater from aquifers and private shallow wells.  Use of water in Illinois includes residential (both municipal supplies and private wells), agricultural (irrigation and livestock), commercial, and industrial purposes.  Illinois water quality is protected by state and federal legislation.  Find ongoing monitoring results, and options for testing here


To find drinking water alerts for public water supplies in your location, start with your local public health department.

Illinois Water Supply News

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