Information from foreign sources about environmental levels and human exposure to barium was analyzed. The effects of barium were studied on the basis of the results of toxicological experiments and epidemiological studies. Approaches to the derivation of guideline value of barium in drinking water in the United States, the European Union and the recommendations of the World Health Organization were analyzed. Based on the analysis the authors concluded that the revision of barium standard requires study of total barium intake from all sources, assessment of drinking water contribution into the whole exposure, human health risk assessment associated with total barium exposure in the Republic of Belarus.
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