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Groundwater levels for the Nation

! Important: Next Generation Monitoring Location Page

USGS 415930088110602 41N 9E-34.1b1

Cook County, Illinois
Latitude  41°59'30", Longitude  88°11'06" NAD27
Land-surface elevation 804 feet above NAVD88
The depth of the well is 200 feet below land surface.
This well is completed in the Silurian-Devonian aquifers (N400SLRDVN) national aquifer.
This well is completed in the Silurian System (350SLRN) local aquifer.

Period of record
Begin Date End Date Levels
1984-09-18 1985-03-01 3

 
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