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Environ Res. 2015 Jul;140:673-83. doi: 10.1016/j.envres.2015.05.019. Epub 2015 Jun 14.

Influence of contaminated drinking water on perfluoroalkyl acid levels in human serum--A case study from Uppsala, Sweden.

Author information

  • 1National Food Agency, P.O. Box 622, 751 26 Uppsala, Sweden. Electronic address: irina.gyllenhammar@slv.se.
  • 2Helmholtz Centre for Environmental Research - UFZ, Department Analytical Chemistry, Permoserstr. 15, 04318 Leipzig, Germany; Department of Environmental Science and Analytical Chemistry (ACES), Stockholm University, 106 91 Stockholm, Sweden.
  • 3Department of Environmental Science and Analytical Chemistry (ACES), Stockholm University, 106 91 Stockholm, Sweden.
  • 4Uppsala Vatten och Avfall, Box 1444, 751 44 Uppsala, Sweden.
  • 5National Food Agency, P.O. Box 622, 751 26 Uppsala, Sweden.

Abstract

In 2012 a contamination of drinking water with perfluoroalkyl acids (PFAAs) was uncovered in the City of Uppsala, Sweden. The aim of the present study was to determine how these substances have been distributed from the contamination source through the groundwater to the drinking water and how the drinking water exposure has influenced the levels of PFAAs in humans over time. The results show that PFAA levels in groundwater measured 2012-2014 decreased downstream from the point source, although high ΣPFAA levels (>100ng/L) were still found several kilometers from the point source in the Uppsala aquifer. The usage of aqueous film forming fire-fighting foams (AFFF) at a military airport in the north of the city is probably an important contamination source. Computer simulation of the distribution of PFAA-contaminated drinking water throughout the City using a hydraulic model of the pipeline network suggested that consumers in the western and southern parts of Uppsala have received most of the contaminated drinking water. PFAA levels in blood serum from 297 young women from Uppsala County, Sweden, sampled during 1996-1999 and 2008-2011 were analyzed. Significantly higher concentrations of perfluorobutane sulfonic acid (PFBS) and perfluorohexane sulfonic acid (PFHxS) were found among women who lived in districts modeled to have received contaminated drinking water compared to unaffected districts both in 1996-1999 and 2008-2011, indicating that the contamination was already present in the late 1990s. Isomer-specific analysis of PFHxS in serum showed that women in districts with contaminated drinking water also had an increased percentage of branched isomers. Our results further indicate that exposure via contaminated drinking water was the driving factor behind the earlier reported increasing temporal trends of PFBS and PFHxS in blood serum from young women in Uppsala.

PMID:
26079316
DOI:
10.1016/j.envres.2015.05.019
[PubMed - indexed for MEDLINE]
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