ISO/TR 24589-2:2025

Examples of good practice for the management of assets of water supply and wastewater systems — Part 2: Wastewater systems

This document contains selected examples for good practice approaches for the management of assets of wastewater systems. This document is intended as a supporting document for ISO 24516-3 and ISO 24516-4, which contain guidelines for the management of assets of wastewater systems. As such, this document can contribute to realize value from existing assets when following the guidelines for the management of assets of wastewater systems approaches in the strategic, tactical and operational plans given in ISO 24516-3 and ISO 24516-4. NOTE A recapitulative table of the examples covered in this document is provided in Annex A.

Exemples de bonnes pratiques de la gestion d’actifs de systèmes d'approvisionnement en eau potable et d'assainissement — Partie 2: Systèmes d’eaux usées

General Information

• Status: Published
• Publication Date: 29-May-2025
• ICS: 13.060.01 - Water quality in general
• ICS: 13.060.30 - Sewage water
• Technical Committee: ISO/TC 224 - Drinking water, wastewater and stormwater systems and services
• Drafting Committee: ISO/TC 224 - Drinking water, wastewater and stormwater systems and services
• Current Stage: 6060 - International Standard published
• Start Date: 30-May-2025
• Due Date: 25-Jun-2024
• Completion Date: 30-May-2025

Standards Content (Sample)

Technical
Report
ISO/TR 24589-2
First edition
Examples of good practice for the
2025-05
management of assets of water
supply and wastewater systems —
Part 2:
Wastewater systems
Exemples de bonnes pratiques de la gestion d’actifs de systèmes
d'approvisionnement en eau potable et d'assainissement —
Partie 2: Systèmes d’eaux usées
Reference number
© ISO 2025
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Published in Switzerland
ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principal aspects . 1
4.1 Objectives .1
4.1.1 Multiple wastewater utilities .1
4.1.2 Collection network .2
4.1.3 Treatment plants and other elements .2
4.2 Strategies .6
4.2.1 Maintenance strategy .6
4.2.2 Renewals decision .7
4.2.3 Inspection strategy of collection network .7
5 Investigation . . 8
5.1 Non-destructive sewer condition investigation techniques .8
5.2 CCTV good practices .10
5.2.1 General .10
5.2.2 Australian context .10
5.2.3 Objective .11
5.2.4 Methodology . .11
5.3 Automated CCTV condition assessment . 12
5.3.1 General . 12
5.3.2 Context . 12
5.3.3 Activities . 12
5.3.4 Benefits . 12
5.4 Hydraulic investigation. 13
5.4.1 General . 13
5.4.2 Flow monitoring . 13
5.4.3 Hydraulic modelling . 13
6 Assessment . .13
6.1 Deterioration predictive models . 13
6.2 Assess maturity of operations to define action plans .14
6.3 Treatment plant: implementation of simplified and monetized FMECA (Failure Mode,
Effects and Criticality Analysis) . 15
7 Implementation: sustainable field works . 17
8 Operation and maintenance . 17
8.1 Odour management .17
8.1.1 General .17
8.1.2 Australian context .18
8.1.3 Objective .18
8.1.4 Methodology . . .18
8.2 Dynamic simulation for condition analysis and process optimization for a wastewater
treatment plant (WWTP).19
8.2.1 General .19
8.2.2 Context and objectives .19
8.2.3 Outcomes .21
8.3 Monitoring and control .21
8.3.1 General .21
8.3.2 Hypervision . 22
8.3.3 Integrated information systems . 22
8.4 Monitoring . 22

iii
9 Rehabilitation .23
9.1 Network renewal plan . 23
9.2 Rehabilitation strategies based on condition and material deterioration analysis and
forecasting . . . 23
9.3 Plant renewal plan. 29
Annex A (informative) Summary of examples of good practices for asset management of
wastewater systems .30
Bibliography .33

iv
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
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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 ident
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