The unconfined aquifer is the major source of water supply in west-central and southwestern Delaware. The aquifer, which is composed of quartz sand, gravel, clay, and silt, ranges in thickness from 20 to 200 feet. The water table ranges from land surface to about 20 feet below land surface. Analyses of water from wells distributed throughout the area were used to study processes controlling the chemical quality of the water in the unconfined aquifer.
Please give proper credit to the Delaware Geological Survey.
Denver, J.M., 1986, Hydrogeology and Geochemistry of the Unconfined Aquifer, West-Central and Southwestern Delaware: Delaware Geological Survey Report of Investigation 41
Delaware Geological Survey
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