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About This Item
Full Description
ISO 11731-2:2004 describes a monitoring method for the isolation and enumeration of Legionella organisms in water intended for human use (e.g. hot and cold water, water used for washing), for human consumption and for treated bathing waters (e.g. swimming pools). It is especially suitable for waters with prospected low numbers of Legionella. As the growth of Legionella may be inhibited by overgrowth of other bacterial colonies on the membrane the method is only suitable for waters containing low bacterial.
Document History
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ISO 11731:2017
Water quality - Enumeration of Legionella- Most Recent
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ISO 11731-2:2004
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Water quality - Detection and enumeration of Legionella - Part 2: Direct membrane filtration method for waters with low bacterial counts- Historical Version
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ISO 11731:1998
Water quality -- Detection and enumeration of Legionella- Historical Version