Drinking water quality in the glacial aquifer system, northern USA: Geogenic contaminants are commonly found at high concentration in this aquifer system that provides drinking water to 30 million people

Melinda L Erickson, U.S. Geological Survey, Upper Midwest Water Science Center, Minneapolis, MN, United States, Leon Jay Kauffman, USGS New Jersey Water Science Center, West Trenton, NJ, United States, John T Wilson, USGS Indiana Water Science Center, Indianapolis, IN, United States and Richard M Yager, USGS, Ithaca, NY, United States