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. 2015 Aug;22(16):12276-88.
doi: 10.1007/s11356-015-4349-2. Epub 2015 Apr 22.

Identification of the sources of metal (lead) contamination in drinking waters in north-eastern Tasmania using lead isotopic compositions

P J Harvey  1 , H K Handley, M P Taylor
Affiliations

Identification of the sources of metal (lead) contamination in drinking waters in north-eastern Tasmania using lead isotopic compositions

P J Harvey et al. Environ Sci Pollut Res Int. 2015 Aug.

Abstract

This study utilises a range of scientific approaches, including lead isotopic compositions, to differentiate unknown sources of ongoing lead contamination of a drinking water supply in north-eastern Tasmania, Australia. Drinking water lead concentrations are elevated above the Australian Drinking Water Guideline (10 μg/L), reaching 540 μg/L in the supply network. Water lead isotopic compositions from the town of Pioneer ((208)Pb/(207)Pb 2.406, (206)Pb/(207)Pb 1.144 to (208)Pb/(207)Pb 2.360, (206)Pb/(207)Pb 1.094) and Ringarooma ((208)Pb/(207)Pb 2.398, (206)Pb/(207)Pb 1.117) are markedly different from the local bedrock ((208)Pb/(207)Pb 2.496, (206)Pb/(207)Pb 1.237). The data show that the lead in the local waters is sourced from a combination of dilapidated drinking water infrastructure, including lead jointed pipelines, end-of-life polyvinyl chloride pipes and household plumbing. Drinking water is being inadvertently contaminated by aging infrastructure, and it is an issue that warrants investigation to limit the burden of disease from lead exposure.

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