ISO 9111:2024

International
Standard
ISO 9111
First edition
Water reuse in urban areas —
Guidelines for benefit evaluation of
reclaimed water use
Recyclage des eaux dans les zones urbaines — Lignes directrices
concernant l'évaluation des avantages de l'utilisation d'eau
réutilisée
PROOF/ÉPREUVE
Reference number
ISO 9111:2024(en) © ISO 2024

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ISO 9111:2024(en)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2024
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.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
PROOF/ÉPREUVE
© ISO 2024 – All rights reserved
ii

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ISO 9111:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 2
5 General . 2
6 Indicators of benefit evaluation of reclaimed water use . 2
6.1 Holistic indicator system .2
6.2 Resource benefits .3
6.2.1 Conventional water resource savings .3
6.2.2 Energy resource recovery .3
6.2.3 Carbon resource recovery .4
6.2.4 Phosphorous resource recovery.4
6.3 Ecological and environmental benefits .5
6.3.1 Reduction of contaminants .5
6.3.2 Reduction of electricity use .5
6.3.3 Reduction of greenhouse gas (GHG) emissions .6
6.3.4 Achievement of E-flows .
...

ISO/DISPRF 9111:2023(E)
ISO/TC 282/SC 2
Secretariat: SAC
Date: 2023-12-252024-05-03
Water reuse in urban areas ― — Guidelines for benefit evaluation of
reclaimed water use
Recyclage des eaux dans les zones urbaines — Lignes directrices concernant l'évaluation des avantages de
l'utilisation d'eau réutilisée
PROOF

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ISO/DISPRF 9111:2023(E2024(en)
© ISO 20232024
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.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
EmailE-mail: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2023 – All rights reserved
© ISO 2024 – All rights reserved
ii

---------------------- Page: 2 ----------------------
ISO/DISPRF 9111:2023(E2024(en)
Contents
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 2
5 General . 2
6 Indicators of benefit evaluation of reclaimed water use . 3
6.1 Holistic indicator system . 3
6.2 Resource benefits . 3
6.2.1 Conventional water resource savings . 3
6.2.2 Energy resource recovery . 4
6.2.3 Carbon resource recovery . 4
6.2.4 Phosphorous resource recovery . 5
6.3 Ecological and environmental benefits. 5
6.3.1 Reduction of contaminants . 5
6.3.2 Reduction of electricity use . 5
6.3.3 Reduction of greenhouse gas (GHG) emissions . 6
6.3.4 Achievement of E-flows . 7
6.3.5 Ecosystem protection/restoration . 7
6.4 Social benefits . 8
6.4.1 Improvement of local natural environment . 8
6.4.2 Improvement of regional natural environment . 8
6.5 Economic benefits .
...