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View Resource Arsenic in ground water of the United States

From the USGS National Analysis of Trace Elements, this new page offers a recent, much publicized map "that shows where and to what extent arsenic occurs in ground water across the country," a new fact sheet ("Arsenic in ground-water resources of the United States"), and a detailed report ("A retrospective analysis on the occurrence of arsenic in ground-water resources of the US and limitations in...

https://water.usgs.gov/nawqa/trace/arsenic/