Factors Affecting Selected Contaminants in Ground Water from the Piedmont Aquifer System
http://pubs.usgs.gov/sir/2006/5104/
Analysis of the quality of the ground water from the aquifer system which supplies drinking water to Virginia and many other eastern states. Full title is Factors Affecting Occurrence and Distribution of Selected Contaminants in Ground Water from Selected Areas in the Piedmont Aquifer System, Eastern United States, 1993-2003. From the U.S. Geological Survey.
