Assessing the Vulnerability of Public-Supply Wells to Contamination: Central Valley Aquifer System near Modesto, California

http://pubs.usgs.gov/fs/2009/3036/

Using ground-water geochemical analyses, and mathematical models, the factors affecting the quality of public water supply were identified as pumping schedule, screened interval, past land use within the recharge area, and natural geochemical conditions.

by Jagucki, Martha L.; Jurgens, Bryant C.; Burow, Karen R.; and Eberts, Sandra M.

U.S. Geological Survey Fact Sheet 2009-3036

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