# ISO 11731-2:2004 — Withdrawn and superseded ISO standards

For ISO 11731-2:2004, item title is Water quality — Detection and enumeration of Legionella — Part 2: Direct membrane filtration method for waters with low bacterial counts; status code is 9599; successor is ISO 11731:2017; withdrawn / published date is 2004-04-26, recorded from its source on 2026-08-05.

- **Identifier:** ISO 11731-2:2004 _(verified: appears in the quote below)_
- **Item title:** Water quality — Detection and enumeration of Legionella — Part 2: Direct membrane filtration method for waters with low bacterial counts _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 11731:2017
- **Withdrawn / published date:** 2004-04-26 _(verified: appears in the quote below)_

## What the source says

> 32326,IS,,ISO 11731-2:2004,Water quality — Detection and enumeration of Legionella — Part 2: Direct membrane filtration method for waters with low bacterial counts,Qualité de l'eau — Recherche et dénombrement des Legionella — Partie 2: Méthode par filtration directe sur membrane pour les eaux à faible teneur en bactéries,2004-04-26,1,['07.100.20'],ISO/TC 147/SC 4,9599,,[61782],"['en','fr']",9,"<p>ISO 11731-2:2004 describes a monitoring method for the isolation and enumeration of <i>Legionella</i> 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

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).