Guidelines for water quality grade classification for water reuse

This document provides guidelines for water quality grade classification to help users determine the suitability and quality of the reclaimed water for safe non-potable reuse applications, based on the level of exposure. The intention is to enable the water quality grade to be identified at the point of use.

Lignes directrices pour la classification de la qualité de l’eau en vue de sa réutilisation

General Information

Status
Published
Publication Date
04-Nov-2018
Current Stage
6060 - International Standard published
Start Date
05-Nov-2018
Completion Date
05-Nov-2018
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ISO 20469:2018 - Guidelines for water quality grade classification for water reuse
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INTERNATIONAL ISO
STANDARD 20469
First edition
2018-11
Guidelines for water quality grade
classification for water reuse
Lignes directrices pour la classification de la qualité de l’eau en vue de
sa réutilisation
Reference number
ISO 20469:2018(E)
ISO 2018
---------------------- Page: 1 ----------------------
ISO 20469:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
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Email: copyright@iso.org
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Published in Switzerland
ii © ISO 2018 – All rights reserved
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ISO 20469:2018(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Water quality grade classification for reuse application ........................................................................................... 1

4.1 Water quality grade for reuse application ......... .............................................................................................................. 1

4.2 Water quality grade classification .......................................................................................................................................... 2

5 Display of water quality grades ............................................................................................................................................................. 5

Bibliography ................................................................................................................................................................................................................................ 6

© ISO 2018 – All rights reserved iii
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ISO 20469:2018(E)
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.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso

.org/iso/foreword .html.

This document was prepared by Technical Committee ISO/TC 282, Water reuse, Subcommittee SC 3,

Risk and performance evaluation of water reuse systems.

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.
iv © ISO 2018 – All rights reserved
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ISO 20469:2018(E)
Introduction

The reaffirmation of the importance of water along with food security and energy was a significant

outcome in the actions and the follow-up framework passed at the United Nations Conference on

Sustainable Development (Rio+20). With respect to the management of water resources, essential

actions include the prevention of water contamination, more efficient water usage, and the treatment

and best practices for reuse of wastewater as a water resource by households, industries, and

agriculture, particularly in growing urban areas.

Today, many regions in the world face water shortages, and the feasibility of using reclaimed water to

meet water demands for various purposes is of great interest. On the other hand, the potential health

implications of using reclaimed water is of global concern. This has led to an increasing need to specify

appropriate water quality parameters for specific reclaimed water applications, as well as develop

methods of assessing and managing health risks from both regulatory and application perspectives.

Unless these needs are addressed, opportunities for the development of sustainable and appropriate

reclaimed water applications will be lost.

Health risks associated with the use of reclaimed water occur when users use the reclaimed water

inappropriately without knowing its intended purpose. Therefore, it is important that the reuse

application be clearly identified.
© ISO 2018 – All rights reserved v
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INTERNATIONAL STANDARD ISO 20469:2018(E)
Guidelines for water quality grade classification for
water reuse
1 Scope

This document provides guidelines for water quality grade classification to help users determine the

suitability and quality of the reclaimed water for safe non-potable reuse applications, based on the level

of exposure. The intention is to enable the water quality grade to be identified at the point of use.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 20670, Water reuse —
...

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