Groundwater Data

Click here for a list of groundwater monitoring wells in Mason and Tazewell County with real time water level hydrographs.

Recent Updates

The Estimated Irrigation Withdrawals since 1997 spreadsheet has been updated with water usage data from 2023. Changes have been made so that the KWH reported are now recorded in the correct month of usage rather than the month which they were billed.

Illinois State Water Survey has also published the 2022 Annual Report which highlights the monitoring data on precipitation and groundwater levels in the Imperial Valley region during January – December 2023