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Groundwater levels for the Nation

! Important: Next Generation Monitoring Location Page

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USGS 421258088190501 43N 8E- 8.2c1

Mchenry County, Illinois
Hydrologic Unit Code 07120006
Latitude  42°12'58", Longitude  88°19'05" NAD27
Land-surface elevation 900 feet above NGVD29
The depth of the well is 1,300 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 421258088190501 43N 8E- 8.2c1
Breaks in the plot represent a gap of at least one year between field measurements.
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