National foreword

This British Standard is the UK implementation of ISO 6107:2021+A1:2026. It supersedes BS ISO 6107:2021, which is withdrawn.

The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to ISO text carry the number of the ISO amendment. For example, text altered by ISO amendment 1 is indicated by.

The UK participation in its preparation ws entrusted to Technical Committee EH/3, Water quality.

A list of organizations represented on this committee can be obtained on request to its committee manager.

Contractual and legal considerations

This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be accepted by BSI in relation to the adequacy, accuracy, completeness or reasonableness of this publication. All and any such responsibility and liability is expressly disclaimed to the full extent permitted by the law.

This publication is provided as is, and is to be used at the recipient’s own risk.

The recipient is advised to consider seeking professional guidance with respect to its use of this publication.

This publication is not intended to constitute a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2021.

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.

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This document was prepared by Technical Committee ISO/TC 147, Water, Subcommittee SC 1, Terminology.

This first edition cancels and replaces the all editions of ISO 6107-1 to ISO 6107-8, which have been technically revised.

The main changes compared to the previous edition are as follows:

Obsolete terms were removed
Most terms related to waste water treatment committees such as ISO TC 275 Sludge recovery, recycling, treatment and disposal and ISO TC 224 Service activities relating to drinking water supply, wastewater and storm water systems were removed because they are not in the scope of ISO TC 147 Water quality
Most terms were amended and enhanced to align with specific fields such as microbiology, chemistry etc.
Addition of terms that were not covered in previous editions.

Any feedback or questions on this document should be directed to the user’s national standards body. A complete listing of these bodies can be found at www.iso.org/members.html.

Introduction

The definitions in this edition of ISO 6107 are based on available standards and aim to harmonise the understanding of terms used within ISO TC147 Water quality to facilitate clear understanding and application of the water quality standards and to reduce variation of interpretation as far as possible. Source information is provided where available. This standard aims to improve and feed the terminology database for ISO TC147 and to serve as a reference document for all water quality characterisation committees and users.

Terms and the interpretation thereof may differ in various fields i.e.: chemistry microbiology and ecotoxicology. This is indicated in brackets, if applicable, after the term being defined.

ISO 6107 is restricted to definitions for terms which appear in standards of ISO/TC 147, Water quality.

1 Scope

This document defines terms used in certain fields of water quality characterization.

2 Normative references

3 Terms and definitions

Bibliography

BS ISO 6107:2021+A1:2026

Water quality. Vocabulary

Current

Published:

30 Apr 2026

1 Scope