Mercury in women of child-bearing age in 25 countries

1044 women of child-bearing age from 25 countries participated in the study. 42% of them had mercury levels greater than 1 ppm — the level that approximately corresponds to the US EPA reference dose.* 55% of the women had mercury levels greater than 0.58 ppm mercury, a more recent, science-based threshold based on data indicating harmful effects at lower levels of exposure. Mercury is a health threat to women and the developing fetus.