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Groundwater levels for the Nation

! Important: Next Generation Monitoring Location Page

USGS 420753087481101 42N12E-11.6e1

Cook County, Illinois
Latitude  42°07'53", Longitude  87°48'11" NAD27
Land-surface elevation 645 feet above NGVD29
The depth of the well is 1,370 feet below land surface.
This well is completed in the Cambrian-Ordovician aquifer system (S300CAMORD) national aquifer.
This well is completed in the Ordovician System (360ODVC) local aquifer.

Period of record
Begin Date End Date Levels
1959-11-05 1959-11-05 1

 
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