Scientists have studied the water. Rural water (mostly).
The studies come amid new evidence that even low doses of arsenic may reduce IQ in children, in addition to well documented risks of heart disease, cancer and reduced lung function.
“”Arsenic is the biggest public-health problem for water in the United States—it’s the most toxic thing we drink,” said geochemist Yan Zheng, an adjunct research scientist at Columbia University’s Lamont-Doherty Earth Observatory who coedited the special section and coauthored some of the articles. “For some reason, we pay far less attention to it than we do to lesser problems.”