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Groundwater levels for the Nation

! Important: Next Generation Monitoring Location Page

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USGS 420753087481101 42N12E-11.6e1

Cook County, Illinois
Hydrologic Unit Code 07120004
Latitude  42°07'53", Longitude  87°48'11" NAD27
Land-surface elevation 645 feet above NGVD29
The depth of the well is 1,370 feet below land surface.
This well is completed in the Cambrian-Ordovician aquifer system (S300CAMORD) national aquifer.
This well is completed in the Ordovician System (360ODVC) local aquifer.
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Graph of groundwater level data at USGS 420753087481101 42N12E-11.6e1
Breaks in the plot represent a gap of at least one year between field measurements.
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