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Groundwater levels for the Nation

! Important: Next Generation Monitoring Location Page

USGS 414239087543801 37N12E- 7.7e1

Cook County, Illinois
Latitude  41°42'39", Longitude  87°54'38" NAD27
Land-surface elevation 651.59 feet above NGVD29
The depth of the well is 225 feet below land surface.
This well is completed in the Silurian-Devonian aquifers (N400SLRDVN) national aquifer.
This well is completed in the Devonian-Silurian System (340DVSL) local aquifer.

Period of record
Begin Date End Date Levels
1985-10-29 1990-10-30 15

 
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