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    Occurrence of N-nitrosamines in Alberta public drinking-water distribution systems

    Access Status
    Fulltext not available
    Authors
    Charrois, Jeffrey
    Boyd, J.
    Froeses, K.
    Hrudey, S.
    Date
    2007
    Type
    Journal Article
    
    Metadata
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    Citation
    Charrois, J. and Boyd, J. and Froeses, K. and Hrudey, S. 2007. Occurrence of N-nitrosamines in Alberta public drinking-water distribution systems. Journal of Environmental Engineering and Science. 6 (1): pp. 103-114.
    Source Title
    Journal of Environmental Engineering and Science
    DOI
    10.1139/S06-031
    Additional URLs
    http://www.nrcresearchpress.com
    ISSN
    1496-2551
    URI
    http://hdl.handle.net/20.500.11937/38584
    Collection
    • Curtin Research Publications
    Abstract

    Since the 1974 discovery of trihalomethanes as disinfection by-products (DBPs) in drinking water, the regulatory and public health focus has been primarily directed at halogenated compounds, even though it is well established that chlorination and chloramination also produce non-halogenated DBPs. Specific halogenated DBPs that could reasonably explain the correlation of some adverse health outcomes with consumption of disinfected drinking water in a number of epidemiologic studies have yet to be identified. We therefore explored an emerging class of non-halogenated DBPs, N-nitrosamines, which warrant consideration given public health concerns regarding possible correlations of bladder cancer with exposure to chlorinated drinking water. We developed a dual media (Ambersorb® 572 and LiChrolut® EN), off-line, solid-phase extraction method that utilized a modified commercially-available extraction manifold combined with our previous GC–MS ammonia positive chemical ionization (PCI) quantitative method for analyzing N-nitrosamines in drinking water. We surveyed 20 Alberta municipal drinking-water distribution systems for the presence of N-nitrosodimethylamine (NDMA) and seven other N-nitrosamine species. Analytical results revealed the occurrence of NDMA (up to 100 ng/L) as well as two other N-nitrosamines (N-nitrosopyrrolidine and N-nitrosomorpholine) within select Alberta drinking water supplies.Key words: Alberta, chloramination, disinfection by-products, distribution system, drinking water, N-nitrosamines, NDMA, public health, survey.

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