The confluence of the buried Mahomet and Mackinaw Bedrock Valleys, underlying southwest McLean and southeast Tazewell Counties, contains part of one of the largest sand and gravel aquifers in Illinois—the Sankoty-Mahomet ...

This study evaluates the heavily used shallow aquifer system in Will and southern Cook Counties and ascertains its ability to meet the present and future water supply needs of the communities it serves. The hydrogeologic ...