NEWS - U.S. school children exposed to arsenic in well water have lower IQ scores

A study from three school districts in Maine exposed to arsenic in drinking water experienced declines in child intelligence. While earlier studies conducted by the researchers in South Asia, and Bangladesh in particular, showed that exposure to arsenic in drinking water is negatively associated with child intelligence, this is the first study to examine intelligence against individual water arsenic exposures in the U.S ...

http://www.sciencedaily.com/releases/2014/04/140407101714.ht