ISO 20760-1:2025

Water reuse in urban areas — Guidelines for centralized water reuse system — Part 1: Design principle of a centralized water reuse system ISO 20760-1:2025

Publication date:   Nov 14, 2025

Scope

This document provides guidelines for the planning and design of centralized water reuse systems and water reuse applications in urban areas.
This document addresses centralized water reuse systems in their entirety and is applicable to any water reclamation system component (e.g. source water, treatment, storage, distribution, operation and maintenance and monitoring).
This document provides:
—     system components and possible models of a centralized water reuse system;
—     design principles of a centralized water reuse system;
—     common assessment criteria and related examples of water quality indicators, all without setting any target values or thresholds;
—     specific aspects for consideration and emergency response.
This document excludes design parameters and regulatory values of a centralized water reuse system.