New USGS Study on Trace Elements in U.S. Groundwater


A new USGS study evaluates the occurrence of 23 trace elements and radon in groundwater samples from over 5,000 wells collected nationwide from 1992-2003. The report presents trace element occurrence, describes factors that influence the spatial distribution of trace elements, and compares concentrations to human-health benchmarks. A news release and the full report can be accessed online at

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