Several aquifers underlying Campton Township in Kane County, Illinois provide virtually all of the water supply to the residents of the township. These aquifers consist of layers of unconsolidated sand and gravel in the glacial drift; dolomite and shale of the Alexandrian Series and the Maquoketa Group (the Silurian-Maquoketa aquifer); dolomite of the Platteville and Galena Groups (the Galena-Platteville aquifer); and sandstones of the Glenwood Formation and the St. Peter Sandstone (the Ancell aquifer). In 2002, total withdrawals from these aquifers underlying Campton Township exceeded 1.36 million gallons day.
Water-level altitudes in the shallow and deep glacial drift aquifers generally follow surface topography. Comparison of water levels measured in 1995 and 2002 does not indicate large (15 feet or more) water-level declines in these aquifers beneath most of the township.
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