Central Illinois mayors are urging Gov. Pat Quinn to intervene in a plan to dispose of toxic waste at a landfill above an aquifer.
The Mahomet Aquifer supplies water to more than half a million people.
The company that owns the Clinton Landfill wants to store PCBs at the site and says a liner would protect the aquifer. The plan needs environmental approval.
Normal Mayor Chris Koos was among those who met Quinn Wednesday to discuss fears of contamination.
Koos says that when DeWitt County approved the landfill location in 2002 board members were unaware it could eventually store PCBs.
The mayors want to redo the permitting process, and Koos says he's certain it would not pass now.
Quinn's office says it's reviewing options.