The geometric mean of hair Hg concentrations was 1.10 µg/g.
19% of children had Hg concentrations above the RfD proposed by the WHO.
Hair Hg concentrations in children increased as a function of total fish intake.
Swordfish, lean fish and canned fish were the most related to Hg concentrations.
There was a decrease in Hg concentrations from birth to age four.