In a 2014 study, published in the journal
Epidemology, scientists found that more than 10 percent of people
exposed to drinking water contaminated with perfluoroctanoic acid (or PFOA,
made by DOW Chemical) reported having some sort of thyroid problem.
PFOA is part of a group of problematic nonstick
chemicals that fall into the perfluorinated compounds (PFCs) class, a
family of fluoride-containing chemicals with unique properties that make
things stick- and stain-resistant. The problem is, these compounds don't
break down easily and can readily be found inside of our bodies. Along
with thyroid disease, different PFCs have also been linked to cancer,
infertility, birth defects, and weaker immune systems.