Groundwater Contamination in McHenry, Illinois

Additional testing performed in February 2007 by the McHenry County Health Department confirmed the results from the January 2007 well testing and identified two wells contaminated with vinyl chloride. The well owners were advised by county and state health agencies not to drink the well water. Both of these wells were west of the Inverse Investments site. Five other wells had detections of vinyl chloride or cis-1,2-Dichloroethene (cis-1,2-DCE), which are breakdown products of solvents. Two private wells showed gasoline-related contamination at low levels, and nine wells showed no VOC contamination. The printable map referenced in the fact sheet will be included as a separate pdf attachment.