Guidelines for the management of assets of water supply and wastewater systems - Part 1: Drinking water distribution networks - Amendment 1: Performance indicators and requirements for monitoring and review with additional related examples

Lignes directrices pour la gestion d'actifs des systèmes d'eaux usées et d'eau potable — Partie 1: Réseaux de distribution d'eau potable — Amendement 1: Exigences et indicateurs de performance pour la surveillance et la revue, accompagnés d’exemples supplémentaires

General Information

Status
Published
Publication Date
15-Sep-2025
Current Stage
6060 - International Standard published
Start Date
16-Sep-2025
Due Date
03-Jul-2025
Completion Date
16-Sep-2025

Relations

Effective Date
08-Jul-2023

Overview

ISO 24516-1:2016/Amd 1:2025 is an important amendment to the international standard providing guidelines for the management of assets in drinking water distribution networks. Published by ISO, this document enhances the original 2016 standard by introducing updated performance indicators, monitoring requirements, and review processes, supported by additional examples for practical implementation. The amendment aims to improve the reliability, efficiency, and sustainability of water supply systems by guiding utilities on evaluating and managing their drinking water infrastructure assets.

Key Topics

  • Performance Indicators for Drinking Water Networks
    The amendment introduces specific performance metrics to evaluate structural, operational, and user-related aspects of water supply systems, enabling continuous monitoring and data-driven management decisions. Key indicators include:

    • Structural: number of bursts, interruptions of supply
    • Operational: number and duration of maintenance interventions
    • User-related: quantity and types of consumer complaints
  • Monitoring and Post-Completion Review
    After any maintenance or capital project, the document recommends conducting comprehensive post-completion evaluations. These assessments compare network performance over time, measuring the impact of interventions and identifying areas needing improvement.

  • Financial Impact Analysis
    Guidelines specify calculating the financial impact related to reductions in water loss, non-revenue water, and operational expenditure (OPEX) from decreased maintenance efforts.

  • Periodic Review and Communication
    Performance achievements must be reviewed regularly and communicated to internal and external stakeholders, including management committees, boards of directors, and involved regulators. This fosters transparency and supports governance under ISO 24540 principles for corporate governance of water utilities.

  • Corrective Actions and Adjustments
    When performance is below expectations, detailed investigations should identify root causes, including analysis of complaints, intervention history, pipe materials, and hydraulic equipment. Based on findings, corrective measures may involve adjusting operational strategies, risk criteria, budgets, or functional requirements.

  • Reference Failure Rates and Inspection Frequencies
    Annex B provides practical tables with reference failure rates for components such as principal mains, service connections, valves, and hydrants, along with recommended inspection intervals to aid utility asset management and maintenance planning.

Applications

  • Water Utility Asset Management
    Helps drinking water utilities enhance the management of distribution networks through structured monitoring and performance evaluation, ensuring sustainable service levels and compliance with regulatory expectations.

  • Operational Efficiency Improvement
    Supports water system operators in identifying operational inefficiencies and implementing cost-saving measures through data-driven insights on network performance.

  • Regulatory Reporting and Governance
    Facilitates compliance with governance frameworks by establishing clear communication and reporting protocols for asset management performance to stakeholders including regulators and board members.

  • Benchmarking and Performance Goal Setting
    Utilities can use the standard’s performance indicators and failure rate data to benchmark their network condition against international best practices and define realistic performance targets.

  • Maintenance Planning and Risk Management
    Informs inspection frequency planning and risk evaluation to reduce failure rates, enhance reliability, and optimize maintenance budgets for water distribution infrastructure.

Related Standards

  • ISO 24510: Activities relating to drinking water and wastewater services - Guidelines for the management of drinking water utilities and assessment of services
  • EN 805: Water supply - Requirements for systems and components outside buildings
  • ISO 24540: Principles for effective and efficient corporate governance of water utilities
  • DVGW W 400-3 (A): Technical rules for Water Supply Systems – Part 3: Operation and Maintenance

By integrating these complementary standards, water utilities can achieve a holistic approach to asset management, operational performance, and governance within drinking water distribution systems.


Keywords: ISO 24516-1 amendment, water supply asset management, drinking water distribution networks, performance indicators, water infrastructure monitoring, wastewater system guidelines, water utility governance, water network failure rates, water loss reduction, operational efficiency in water utilities

Standard

ISO 24516-1:2016/Amd 1:2025 - Guidelines for the management of assets of water supply and wastewater systems — Part 1: Drinking water distribution networks — Amendment 1: Performance indicators and requirements for monitoring and review with additional related examples Released:16. 09. 2025

English language
3 pages
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Standard

ISO 24516-1:2016/Amd 1:2025 - Lignes directrices pour la gestion d'actifs des systèmes d'eaux usées et d'eau potable — Partie 1: Réseaux de distribution d'eau potable — Amendement 1: Exigences et indicateurs de performance pour la surveillance et la revue, accompagnés d’exemples supplémentaires Released:16. 09. 2025

French language
3 pages
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Frequently Asked Questions

ISO 24516-1:2016/Amd 1:2025 is a standard published by the International Organization for Standardization (ISO). Its full title is "Guidelines for the management of assets of water supply and wastewater systems - Part 1: Drinking water distribution networks - Amendment 1: Performance indicators and requirements for monitoring and review with additional related examples". This standard covers: Guidelines for the management of assets of water supply and wastewater systems - Part 1: Drinking water distribution networks - Amendment 1: Performance indicators and requirements for monitoring and review with additional related examples

Guidelines for the management of assets of water supply and wastewater systems - Part 1: Drinking water distribution networks - Amendment 1: Performance indicators and requirements for monitoring and review with additional related examples

ISO 24516-1:2016/Amd 1:2025 is classified under the following ICS (International Classification for Standards) categories: 13.060.01 - Water quality in general; 13.060.20 - Drinking water. The ICS classification helps identify the subject area and facilitates finding related standards.

ISO 24516-1:2016/Amd 1:2025 has the following relationships with other standards: It is inter standard links to ISO 24516-1:2016. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

ISO 24516-1:2016/Amd 1:2025 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


International
Standard
ISO 24516-1
First edition
Guidelines for the management
2016-11-15
of assets of water supply and
wastewater systems —
AMENDMENT 1
2025-09
Part 1:
Drinking water distribution
networks
AMENDMENT 1: Performance
indicators and requirements for
monitoring and review with additional
related examples
Lignes directrices pour la gestion d'actifs des systèmes d'eaux
usées et d'eau potable —
Partie 1: Réseaux de distribution d'eau potable
AMENDEMENT 1: Exigences et indicateurs de performance
pour la surveillance et la revue, accompagnés d’exemples
supplémentaires
Reference number
ISO 24516-1:2016/Amd.1:2025(en) © ISO 2025

ISO 24516-1:2016/Amd.1:2025(en)
© ISO 2025
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
ii
ISO 24516-1:2016/Amd.1:2025(en)
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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 224, Drinking water, wastewater and
stormwater systems and services.
A list of all parts in the ISO 24516 series can be found on the ISO website.
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.

iii
ISO 24516-1:2016/Amd.1:2025(en)
Guidelines for the management of assets of water supply and
wastewater systems —
Part 1:
Drinking water distribution networks
AMENDMENT 1: Performance indicators and requirements for
monitoring and review with additional related examples

Clause 3, Terms and definitions
Remove the following source references from the terminological entries asset (3.1), asset management (3.2),
maintenance (3.12) and service (3.19):
[SOURCE: ISO 24510:2007, 2.4]
[SOURCE: ISO 24510:2007, 2.5]
[SOURCE: ISO 24510:2007, 2.19]
[SOURCE: ISO 24510:2007, 2.44]

Clause 8.4
Add the following paragraphs at the end of the subclause:
After planning and execu
...


Norme
internationale
ISO 24516-1
Première édition
Lignes directrices pour la gestion
2016-11-15
d'actifs des systèmes d'eaux usées
et d'eau potable —
AMENDEMENT 1
2025-09
Partie 1:
Réseaux de distribution d'eau potable
AMENDEMENT 1: Exigences et
indicateurs de performance pour la
surveillance et la revue, accompagnés
d’exemples supplémentaires
Guidelines for the management of assets of water supply and
wastewater systems —
Part 1: Drinking water distribution networks
AMENDMENT 1: Performance indicators and requirements for
monitoring and review with additional related examples
Numéro de référence
ISO 24516-1:2016/Amd.1:2025(fr) © ISO 2025

ISO 24516-1:2016/Amd.1:2025(fr)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2025
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: +41 22 749 01 11
E-mail: copyright@iso.org
Web: www.iso.org
Publié en Suisse
ii
ISO 24516-1:2016/Amd.1:2025(fr)
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale d’organismes nationaux
de normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est en général
confiée aux comités techniques de l’ISO. Chaque comité membre intéressé par une étude a le droit de faire
partie du comité technique créé à cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec l’ISO participent également aux travaux. L’ISO collabore étroitement avec
la Commission électrotechnique internationale (IEC) en ce qui concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient en particulier de prendre note des différents
critères d’approbation requis pour les différents types de documents ISO. Le présent document
a été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2
(voir www.iso.org/directives).
L’ISO attire l’attention sur le fait que la mise en application du présent document peut entraîner l’utilisation
d’un ou de plusieurs brevets. L’ISO ne prend pas position quant à la preuve, à la validité et à l’applicabilité de
tout droit de brevet revendiqué à cet égard. À la date de publication du présent document, l’ISO n’avait pas
reçu notification qu’un ou plusieurs brevets pouvaient être nécessaires à sa mise en application. Toutefois,
il y a lieu d’avertir les responsables de la mise en application du présent document que des informations
plus récentes sont susceptibles de figurer dans la base de données de brevets, disponible à l’adresse
www.iso.org/brevets. L’ISO ne saurait être tenue pour responsable de ne pas avoir identifié de tels droits de
propriété et averti de leur existence.
Les appellations commerciales éventuellement mentionnées dans le présent document sont données pour
information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l’ISO liés à l’évaluation de la conformité, ou pour toute information au sujet de l’adhésion de
l’ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles techniques au
commerce (OTC), voir le lien suivant: www.iso.org/avant-propos.html.
Le présent document a été élaboré par le comité technique ISO/TC 224, Systèmes et services relatifs à l’eau
potable, à l’assainissement et à la gestion des eaux pluviales.
Une liste de toutes les parties de la série ISO 24516 se trouve sur le site web de l’ISO.
Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent
document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes se
trouve à l’adresse www.iso.org/fr/members.html.

iii
ISO 24516-1:2016/Amd.1:2025(fr)
Lignes directrices pour la gestion d'actifs des systèmes d'eaux
usées et d'eau potable —
Partie 1:
Réseaux de distribution d'eau potable
AMENDEMENT 1: Exigences et indicateurs de performance
pour la surveillance et la revue, accompagnés d’exemples
supplémentaires
Article 3, Termes et définitions
Supprimer les références des documents ci-après dans les articles terminologiques patrimoine (3.1), gestion
de patrimoine (3.2), maintenance (3.12) et service (3.19):
[SOURCE: ISO 24510:2007, 2.4]
[SOURCE: ISO 24510:2007, 2.5]
[SOURCE: ISO 24510:2007, 2.19]
[SOURCE: ISO 24510:2007, 2.44]

Article 8.4
Ajouter les alinéas suivants à la fin du paragraphe:
«Après planification et exécution des travaux, il convient de procéder, une fois ces derniers achevés, à une
évaluation afin de mesurer l’efficacité des projets réalisés et leu
...

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