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Groundwater levels for the Nation

! Important: Next Generation Monitoring Location Page

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USGS 420030087573201 41N11E-26.8a1

Cook County, Illinois
Hydrologic Unit Code 07120004
Latitude  42°00'30", Longitude  87°57'32" NAD27
Land-surface elevation 678.00 feet above NGVD29
The depth of the well is 1,395 feet below land surface.
The depth of the hole is 1,395 feet below land surface.
This well is completed in the Cambrian-Ordovician aquifer system (S300CAMORD) national aquifer.
This well is completed in the Ordovician-Cambrian Systems (367OVCB) local aquifer.
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Graph of groundwater level data at USGS 420030087573201 41N11E-26.8a1
Breaks in the plot represent a gap of at least one year between field measurements.
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