# ISO 11731:1998 — Withdrawn and superseded ISO standards

For ISO 11731:1998, item title is Water quality — Detection and enumeration of Legionella; status code is 9599; successor is ISO 11731:2017 | ISO/WD 11731-1; withdrawn / published date is 1998-04-30, recorded from its source on 2026-08-05.

- **Identifier:** ISO 11731:1998 _(verified: appears in the quote below)_
- **Item title:** Water quality — Detection and enumeration of Legionella _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 11731:2017 | ISO/WD 11731-1
- **Withdrawn / published date:** 1998-04-30 _(verified: appears in the quote below)_

## What the source says

> 19653,IS,,ISO 11731:1998,Water quality — Detection and enumeration of Legionella,Qualité de l'eau — Recherche et dénombrement des Legionella,1998-04-30,1,['07.100.20'],ISO/TC 147/SC 4,9599,,"[61782,39366]","['en','fr']",16,

## 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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).