Map Unit A: High Potential for Aquifer Contamination
Map Unit A is defined as areas with sand and gravel or high-permeability bedrock aquifers greater than 20 feet
thick and where the upper surface of the aquifer is within 20 feet of the land surface. Map Unit A is classified as
an area of high aquifer sensitivity. It is most prevalent in southern and northwestern Kane County and along the Fox
River where the drift is thin. In these areas, contaminants from any source can move rapidly through the sand and gravel
deposits to wells or nearby streams. Land use practices should be very conservative in all areas mapped as Map Unit
A.
Page 49 of the Kane County Water Resources Investigations:
Interim Report on Geologic Investigations by the Illinois State Geological Survey Dated May 7 2004
Map Application per Page 50 of the report:
Kane County's 2020 land Resources Managment Plan recognized the vulnerability of the county's water resources
to contamination. .... The Preliminary Map of Aquifer Sensitivity to Contamination, Kane County , Illinois (Dey
et al. 2004c) is a useful tool for countywide planning. It should be used as a guide in decisions that have a potential
to negatively impact groundwater.
