# ISO 11733:1995 — Withdrawn and superseded ISO standards

For ISO 11733:1995, item title is Water quality — Evaluation of the elimination and biodegradability of organic compounds in an aqueous medium — Activated sludge simulation test; status code is 9599; successor is ISO 11733:2004; withdrawn / published date is 1995-11-30, recorded from its source on 2026-08-05.

- **Identifier:** ISO 11733:1995 _(verified: appears in the quote below)_
- **Item title:** Water quality — Evaluation of the elimination and biodegradability of organic compounds in an aqueous medium — Activated sludge simulation test _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 11733:2004
- **Withdrawn / published date:** 1995-11-30 _(verified: appears in the quote below)_

## What the source says

> 19655,IS,,ISO 11733:1995,Water quality — Evaluation of the elimination and biodegradability of organic compounds in an aqueous medium — Activated sludge simulation test,Qualité de l'eau — Évaluation de l'élimination et de la biodégradabilité des composés organiques en milieu aqueux — Essai de simulation des boues activées,1995-11-30,1,['13.060.70'],ISO/TC 147/SC 5,9599,,[34416],"['en','fr']",14,<p>Specifies a method for the evaluation of the elimination and biodegradability of non-volatile organic compounds at a given concentration by aerobic microorganisms. The conditions described simulate a waste-water treatment plant.</p>

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).