The arsenic content of bottled mineral waters.

The arsenic levels of 23 mineral waters on sale to the public in the United Kingdom were measured. The arsenic content of most waters was below 1 μg L(-1) but the statutory limits of 50 ug L(-1) for natural mineral waters and 100 μg L(-1) for non-alcoholic beverages were exceeded by the French mineral water, Vichy Célestins (220 ug L(-1)). Regular consumption of mineral water of such elevated concentration could make a significant contribution to the intake of the more toxic inorganic species of arsenic, with possible adverse long-term effects on the health of some individuals. The general need for analytical speciation studies of dietary arsenic is emphasised.