Latitude 41°42'40.4", Longitude 87°40'33.5" NAD83 Cook County, Illinois, Hydrologic Unit 07120003
Land surface altitude: 664 feet above sea level NGVD29. Well completed in "Sand and gravel aquifers (glaciated regions)" (N100GLCIAL) national aquifer. Well completed in "Quaternary System" (110QRNR) local aquifer