The Illinois State Water Survey operates two observation well networks (WARM and ICN) to
collect data on shallow groundwater levels across the state. The observation
wells typically are located in areas remote from pumping so only natural
fluctuations in the water table, undisturbed by pumping, are measured. These
data allow scientists to assess both short-term and long-term trends in the
water table. This information is useful for understanding the effects of
climate on Illinois’ hydrologic cycle.
* Note: CSV files contain the entire period of data for a given station
Groundwater
Levels Contact:
Ken Hlinka
Illinois State Water Survey
Center for Groundwater Science
2204 Griffith Drive
Champaign, IL 61821
