Metro

Study finds tainted private wells around New England

Arsenic, uranium exceed safe limits

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A study released by the US Geological Survey found that arsenic exceeded federal safety standards for public drinking water at 13 percent of the sites tested -- nearly double the national rate. More than 10 micrograms of arsenic per liter is considered potentially harmful.

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NOTE: Data come from Crystalline-Rock Aquifers in New England,New Jersey, and New York, 1995-2007.

SOURCE: US Geological Survey report

Patrick Garvin, Daigo Fujiwara/Globe Staff

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