According to a Fox News report, researchers in China and Iran have found that excessive fluoride consumption resulted in a 7-point reduction in children's IQs.
In Maine, a large portion of the population uses private well water, which isn't held to the same standards that federal or state water meets.
A quarter of the towns in Maine were found to ?contain risky amounts of fluoride?sometimes more than twice the EPA's limit? according to a voluntary study.
According to the Portland Press Herald, ?The tests were conducted between 2005 and 2009, according to the Maine CDC. The dangerously high levels were found to exceed levels recommended by the U.S. Environmental Protection Agency, and were similar to levels referenced in studies done in communities in China and Iran that linked high fluoride exposure to decreased IQ levels.?
?I?m certain the number of wells that have this problem is smaller than those that have high arsenic, but this reinforces the need for people to test their wells,? said Robert Marvinney, the Maine Geological Survey director.