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Groundwater levels for Illinois

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NOTE: From May 7 to May 13; the IL offices of the USGS Water Science Center are transitioning to a new data management software package. While you may not notice this transition, some sites may have problems or delays in being updated. We are actively monitoring these conditions and are resolving them as quickly as possible.



Choose Site Selection Criteria
There are 3,030 sites with groundwater-level measurements. Choose at least one of the following criteria to constrain the number of sites selected.

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          Data
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