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  • Title: [Lead pollution of drinking water in lower Saxony from corrosion of pipe materials].
    Author: Zietz BP, Lass J, Dunkelberg H, Suchenwirth R.
    Journal: Gesundheitswesen; 2009 May; 71(5):265-74. PubMed ID: 19387929.
    Abstract:
    BACKGROUND: The corrosion of drinking water pipe materials can release different elements into tap water. Especially important in this context is the heavy metal lead, which mainly leaches from the peripheral water distribution system. Lead is known to have numerous adverse effects especially to infants and children. AIM AND METHOD: The aim of this project was to assess the present state of drinking water contamination with lead in Lower Saxony and to promote the replacement of lead pipes. For this purpose a project was initiated comprising three parts. Firstly, a free examination of drinking water was offered in cooperation with local public health departments for private households with young women and families with children living in buildings constructed before 1974. Participants were asked to collect a cold tap water sample in their household after nocturnal stagnation and to complete a questionnaire. The collected samples were analysed by atomic absorption spectrometry for their lead concentration. Secondly, data from local public health departments on results of lead measurements, especially in buildings for the public, were collected and analysed. Finally, a working group 'lead replacement' consisting of representatives of all relevant parties (e.g., tenant and landlord associations, handicraft, building and health administration) was initiated. RESULTS: In the project in total 2,901 tap water samples from households were collected between the years 2005 and 2007. Of these, 7.5% had lead concentrations exceeding 10 microg/L (recommended limit of the World Health Organisation) and 3.3% had concentrations above the limit of the German drinking water ordinance (25 microg/L). There were remarkable regional differences in the frequency of tap water contamination. Multi-family houses were more frequently affected than single and double family houses. Additional data were collected in a preceding study in southern Lower Saxony. Of the 1 434 stagnation samples, 3.1% had lead concentrations greater than 10 microg/L and 0.6% had concentrations above the former limit of the German drinking water regulations of 40 microg/L.
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