ISO 11731-2:2004
Water quality - Detection and enumeration of Legionella - Part 2: Direct membrane filtration method for waters with low bacterial counts

Standard No.

ISO 11731-2:2004

Release Date

2004

Published By

International Organization for Standardization (ISO)

Latest

ISO 11731-2:2004

Scope

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.

ISO 11731-2:2004 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

ISO 11731-2:2004 history

• 2004 ISO 11731-2:2004 Water quality - Detection and enumeration of Legionella - Part 2: Direct membrane filtration method for waters with low bacterial counts