EN ISO 11731-2:2008 Water quality - Detection and enumeration of Legionella - Part 2: Direct membrane filtration method for waters with low bacterial counts
This part of ISO 11731 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 expected
to contain 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 counts.
EN ISO 11731-2:2008 Referenced Document
ISO 11731:1998 Water quality - Detection and enumeration of Legionella
ISO 3696:1987 Water for analytical laboratory use; Specification and test methods
ISO 8199 Water quality - General requirements and guidance for microbiological examinations by culture*, 2018-09-30 Update
EN ISO 11731-2:2008 history
2008EN ISO 11731-2:2008 Water quality - Detection and enumeration of Legionella - Part 2: Direct membrane filtration method for waters with low bacterial counts