Fluoride in ground water.
D002648:Child; D002675:Child, Preschool; D002712:Chlorides / Q000032:analysis; D005457:Fluoridation; D005459:Fluorides / Q000032:analysis*; D006801:Humans; D007223:Infant; D012964:Sodium / Q000032:analysis; D014481:United States; D014881:Water Supply / Q000032:analysis*
D002712:Chlorides; D012964:Sodium; D005459:Fluorides