Mahomet Aquifer Protection Task Force

The Mahomet Aquifer Protection Task Force was created by Public Act 100-0403 to address the issue of maintaining the clean drinking water of the Mahomet Aquifer.  Task Force members are required to conduct a study of the Mahomet Aquifer to:

  • Develop a State plan to maintain the groundwater quality of the Mahomet Aquifer;
  • Identify potential and current contamination threats to the water quality of the Mahomet Aquifer;
  • Identify actions that might be taken to ensure the long-term protection of the Mahomet Aquifer; and
  • Make legislative recommendations for future protection of the Mahomet Aquifer

Meeting Information



Agenda & PN



February 23, 2018

First Christian Church

3350 N. MacArthur Road

Decatur, IL 62526

 Agenda - 180223

Public Notice 180223

 Draft Minutes 180223

 ILEPA - Rick Cobb

ISWS - George Roadcap 

March 26, 2018

Champaign County Board Lyle Shields Meeting Room

Brookens Administrative Center

1776 East Washington Street

Urbana, IL 61802-4581

Draft Agenda



April 30, 2018




May 14, 2018





June 18, 2018




Contact Information

Illinois EPA

Office of Community Relations

Barb Lieberoff


Reference Materials

Reports, Publications and Planning Documents

Illinois EPA 2012 Integrated Water Quality Report: Illinois EPA has done a focused evaluation the CWS probabilistic network wells screened in the Mahomet Aquifer.  Information related to this evaluation is found in our 2012 Integrated Water Quality Report - Volume II, specifically pages 39 - 49 and Figures C-8 and C-9 on pages 22 and 24, respectively.

Illinois EPA's Groundwater Quality Protection Program webpage has links to program details and resources including the documents Groundwater Protection by Local Governments and Guidance Document for Groundwater Protection Needs Assessment

Illinois EPA Source Water Assessment Protection Program GIS Tool:

"Meeting East-Central Illinois Water Needs to 2050: Potential Impacts on the Mahomet Aquifer and Surface Reservoirs"

The Mahomet Aquifer Consortium ( "A Plan to Improve the Planning and Management of Water Supplies in East-Central Illinois" 

Natural Gas Working group: 

"Anomalous Groundwater Pressure Responses in the Mahomet Aquifer Near the Manlove Gas Storage Field" - George Roadcap, PhD, Illinois State Water Survey 

Example Ordinances

The Central Region Groundwater Protection Committee’s web page includes links to the Tazewell County Groundwater Protection Ordinance and the City of Pekin’s Overlay Wellhead Ordinance 


Video on 3-D mapping that includes 3D redering of the Mahomet Aquifer: Barb Stiff - ISGS

Video on Recharge Rates of the Mahomet Aquifer: George Roadcap - ISWS