From: Urgent need to reevaluate the latest World Health Organization guidelines for toxic inorganic substances in drinking water
Age
Upper limit
0 to 6Â months
45 μg/day
7 to 12Â months
60 μg/day
1 to 3Â years
90 μg/day
4 to 8Â years
150 μg/day
9 to 13Â years
280 μg/day
14 to 18Â years
400 μg/day