title: [Preliminary health risk assessment of heavy metals in drinking waters in Beijing].
abstract: Concentrations distribution of the Cu, Hg, Cd, As in drinking water in the 8 city districts and 10 counties in Beijing was studied based on a total of 120 random samples. Health risks associated with 4 metals in drinking water were assessed using USEPA health risk assessment model. The results showed that the concentrations of the heavy metals in drinking water in Beijing ranged from 0.81 to 6.96 micrograms.L-1 for Cu, 0.34-0.82 microgram.L-1 for Cd, 0.10-0.74 microgram.L-1 for Hg and 0.19-3.02 micrograms.L-1 for As. Among the health risks caused by the carcinogens in drinking water, the largest risk associated with As should be in Tongzhou County (2.0 x 10(-5).a-1) and that with Cd should be in Changping County (2.3 x 10(-6).a-1), while both were significantly lower than the maximum allowance levels recommended by ICRP(5 x 10(-5).a-1). Among the non-carcinogenic risks in drinking water, the largest risk was the risk associated with Hg, followed by Cu. The non-carcinogenic risks levels ranged from 10(-8) to 10(-9), much lower than the maximum allowance levels recommended by ICRP.
authors.affiliation: State Key Laboratory of Environmental Aquatic Chemistry, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Department of Chemical Engineering, Beijing Forestry University, Beijing, China.
authors.forename: Ji-jun
authors.initials: JJ
authors.lastname: Gao
authors.forename: Li-ping
authors.initials: LP
authors.lastname: Zhang
authors.forename: Sheng-biao
authors.initials: SB
authors.lastname: Huang
authors.forename: Mei
authors.initials: M
authors.lastname: Ma
authors.forename: Zi-jian
authors.initials: ZJ
authors.lastname: Wang
mesh_terms: D002681:China; D019216:Metals, Heavy / Q000032:analysis / Q000633:toxicity*; D018570:Risk Assessment; D014874:Water Pollutants, Chemical / Q000633:toxicity*; D014881:Water Supply / Q000032:analysis*
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical