This Rocket Fuel Chemical can occur naturally but has been found in larger amounts in areas where defense industries exist. Baby Formula's that use cow's milk seem to have a higher amount of this chemical that can effect the Thyroid in babies.

The EPA has checked nearly 4,000 public water supplies serving 10,000 people or more. About 160 of the water systems had detectable levels of perchlorate, and 31 had levels high enough to exceed a new safety level the EPA is considering.