About The Illinois State Water Survey

Groundwater Science

Imperial Valley Monitoring

The Illinois State Water Survey, under contract to the Imperial Valley Water Authority (IVWA), has operated a network of groundwater observation wells in Mason and Tazewell Counties since 1994. The purpose of the groundwater observation well network is to collect long-term data to determine the impact of groundwater withdrawals during dry periods and the growing season, as well as to monitor the potential for groundwater flooding.  

The map indicates the location of each of the wells monitored in the region (labeled MTOW). It also includes the location of the rain gauge network also funded by the IVWA (labeled R).  

The following wells are equipped with real-time data. Click on a well to view the hydrograph and download the data. 


Map of monitoring wells (click image to enlarge)IVWA



*The Imperial Valley groundwater and rain gauge monitoring networks are funded by the Imperial Valley Water Authority.

Illinois State Water Survey

2204 Griffith Dr., MC-674
Champaign, IL 61820-7463
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