While many Americans struggle to trim sugar and fat from their diets, a far more dangerous ingredient may be seeping in…from the ground. Arsenic is an odorless, tasteless poison that exists in the earth’s crust. Last winter, the U.S. Geological Survey found that low levels of arsenic were present in forty percent of New Hampshire’s groundwater, for example, with one in five wells measuring above ten parts-per-billion.
Independent researchers have also identified excessive levels of arsenic in water-intensive crops, including rice grown in the U.S. and abroad. Deborah Blum is a Pulitzer Prize-winning science journalist, columnist and blogger for Wired and The New York Times. She was given access to a U.S.G.S. map showing arsenic concentration across the U.S. ahead of its release to the public, and is joining us to share some of the findings.