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Groundwater levels for the Nation

! Important: Next Generation Monitoring Location Page

USGS 420158087572501 41N11E-23.7f1

Cook County, Illinois
Latitude  42°01'58", Longitude  87°57'25" NAD27
Land-surface elevation 672.00 feet above NGVD29
The depth of the well is 1,961 feet below land surface.
The depth of the hole is 1,961 feet below land surface.

Period of record
Begin Date End Date Levels
1972-08-17 1972-08-17 1

 
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