About The Illinois State Water Survey

Groundwater Science

Northern Logan County Groundwater Monitoring

The Illinois State Water Survey (ISWS), under contract to the Northern Logan County Water Authority, continuously monitors five wells:  SWS-E, SWS-10, SWS-08, MTH-22D, and MTH-22S. Two water levels are monitored at MTH-22, deep (labeled D) and shallow (labeled S). These four wells are part of the larger McTaz monitoring network, shown in the map.

Real-Time Well Monitoring Data


* - Data at the following sites are still undergoing QA/QC.


Project Publications

Each year, the ISWS submits a letter report to sponsors and interested groups in the area. The letter contains hydrographs of each well, a summary of the information gathered to date, and some analysis of the data where findings warrant it.

2022 Monitoring Report

2021 Monitoring Report

2020 Monitoring Report

Illinois State Water Survey

2204 Griffith Dr., MC-674
Champaign, IL 61820-7463
Email us with questions or comments.


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