Latitude 41°48'41", Longitude 87°53'19" NAD27
Cook County, Illinois , Hydrologic Unit 07120004
Well depth: 358 feet Land surface altitude: 657
feet above NAVD88.
Well completed in "Silurian-Devonian aquifers" (N400SLRDVN) national aquifer.
Well completed in "Silurian System" (350SLRN) local aquifer