Abstract
This study investigated the levels of eight metallic elements (Cr, Fe, Mn, Cu, Zn, Cd, Pb, Hg) in source water of 30 tap water treatment plants (TWTPs) located along Huaihe River in the section of Jiangsu Province, China during 2007–2009 and assessed the preliminary risk assessment induced by metals. Among all the metals, Fe was found to have the highest concentration (107.7 ?g L?1), and Hg had the lowest (0.027 ?g L?1). A preliminary risk assessment was then carried out to determine the human health risk by calculating Hazard Quotient (HQ) and carcinogenic risk of the metals. Both HQs of individual metals in each TWTP were lower than unity. The carcinogenic risk of both Pb and Fe was higher than 10–6, suggesting that the two metals may pose potential adverse effects to local residents.
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