"That being said," she added, "the most well-respected studies (only a handful exist) on perchlorate contamination have not found any link between perchlorate contamination in water and health impacts in children. Therefore, we truly do not know if this kind of contamination may be leading to health problems or not."
Another professor of pediatrics, Keith-Thomas Ayoob of the Albert Einstein College of Medicine, considers the findings "disturbing" and "a wake-up call to municipalities to clean up their water supplies, if at all possible."
At her confirmation hearing in January, EPA Administrator Lisa Jackson agreed to take another look at the safety of perchlorate.
The study appeared in the March 2009 issue of the Journal of Exposure Science and Environmental Epidemiology.
The CDC study is based on a handful of samples bought in one city and includes the caveat: "The results of this study may not be relevant throughout the United States."
Still, Ayoob told ABC News, "This is a perfect example of how polluting one area of the environment can be magnified."
"It's not causing harm to the animals or most consumers, but you can see how the effect can be magnified," Ayoob said. "If we get rid of the perchlorate, then the infants, their parents, all consumers, and even the cows and the farmers will be better off and happier."
Read the Environmental Working Group's analysis of the CDC study.