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    Drinkwaterkwaliteit in nieuwbouwwoningen

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    Authors
    Wuijts S
    Slaats PGG
    Versteegh JFM
    Meerkerk MA
    Series/Report no.
    RIVM Rapport 703719023
    Type
    Report
    Language
    nl
    
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    Title
    Drinkwaterkwaliteit in nieuwbouwwoningen
    Translated Title
    Drinking water quality in newly constructed houses
    Publiekssamenvatting
    Drinkwater in nieuw gebouwde woningen bevat vaak verhoogde gehalten lood, nikkel en koper. Daardoor voldoet het drinkwater in deze woningen niet aan de eisen van het Waterleidingbesluit. Mogelijk is de kwaliteit van het drinkwater ook bij oplevering van de woning onvoldoende. Vooralsnog is echter geen sprake van acute gezondheidsrisico's. De normstelling gaat uit van een langdurige blootstelling aan deze metalen, en dat is in deze situatie waarschijnlijk niet het geval.
    Dit probleem kan verholpen worden door voor de oplevering langdurig en tijdens de eerste maanden van bewoning dagelijks 's ochtends de kranen een aantal minuten te laten lopen. Bewoners dienen hierover beter geinformeerd te worden door de installateur of het waterleidingbedrijf.
    Dit concludeert het RIVM nadat het de drinkwaterkwaliteit in bijna honderd nieuwbouwwoningen heeft onderzocht. Het onderzoek is uitgevoerd in samenwerking met Kiwa Water Research en een aantal waterleidinglaboratoria.
    In vrijwel alle onderzochte nieuwbouwwoningen zijn de verhoogde gehalten metalen aangetroffen. Ze zijn afkomstig uit gebruikte materialen zoals, kranen, koppelingen, soldeer en leidingen. Nieuwe materialen geven gedurende de eerste maanden metalen af. Ook zijn hoge aantallen bacterien aangetroffen. Er zijn echter geen aanwijzingen dat er ziekteverwekkende organismen in het drinkwater zitten.

    Drinking water in newly constructed houses often contains increased amounts of lead, nickel and copper. Consequently, it does not meet the quality standards set by the Drinking Water Act of the Netherlands. It is possible that the drinking water quality is also inadequate at the completion of these houses. To date, no acute health risks have been associated with this deficiency. The established quality standards are based on long-term exposure of individuals to these metals, which most likely does not occur with residents of newly built houses.
    This problem can be rectified by regularly flushing the water in each tap for a considerable length of time during house construction and by flushing the taps each morning for several minutes during the first months of occupancy. Plumbers/installers and/or the water company should provide the occupants of newly built houses with better information on this subject.
    This is the conclusion drawn by the National Institute for Public Health and the Environment (RIVM) in the Netherlands after analysing the drinking water quality in nearly one hundred newly constructed houses. This project was carried out in collaboration with Kiwa Water Research and a number of laboratories run by water companies.
    Increased amounts of lead, nickel and copper were found in almost all of the newly constructed houses investigated. These metals originated from the materials used in the construction of the plumbing system, such as taps, meters, connectors and pipes. High counts of microorganisms were also found, but there no was no evidence of pathogenic microorganisms in the drinking water samples.
    Description
    Dit rapport bevat een erratum d.d. 17 januari 2008 op de laatste pagina<br>
    Publisher
    Rijksinstituut voor Volksgezondheid en Milieu RIVM
    Kiwa Water Research
    Sponsors
    VROM-Inspectie
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