Water supply for Illinois comes from a variety of sources including surface waters (i.e., rivers, lakes, reservoirs), groundwater from aquifers of various types, 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.  

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

Links to select alert pages from public water suppliers are listed below: