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Groundwater levels for the Nation

! Important: Next Generation Monitoring Location Page

USGS 420307088001701 41N11E- 8.3a1

Cook County, Illinois
Latitude  42°03'07", Longitude  88°00'17" NAD27
Land-surface elevation 692 feet above NGVD29
The depth of the well is 1,602 feet below land surface.
The depth of the hole is 1,602 feet below land surface.
This well is completed in the Cambrian-Ordovician aquifer system (S300CAMORD) national aquifer.
This well is completed in the Ironton-Galesville (372IRGL) local aquifer.

Period of record
Begin Date End Date Levels
1973-08-14 1973-08-15 2

 
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