本文件提供了在危机期间提供替代饮用水服务（ADWS）的指南。 本文件涉及: a） ADWS原则和方法； b） ADWS运营规划和实施。 本文件不适用于: 1） 构成饮用水设施正常运行一部分的计划供水中断； 然而，请注意，所描述的许多原则和方法在这种情况下可能是合适的。 2） 在危机期间，为医院、养老院、学校、接待设施和重要工厂等关键机构和设施的持续运营提供饮用水； 3） 工业、农业或商业用水； 4） 向难民营等临时定居点供水； 5） ISO 24518和ISO/TS 24520涵盖的水服务危机管理系统的开发和实施。

This document provides guidelines on alternative drinking water service (ADWS) provision during a crisis. This document addresses: a) ADWS principles and methods; b) ADWS operational planning and implementation. This document is not applicable to: 1) planned water supply interruptions forming part of drinking water utilities' normal operations; NOTE However, many of the principles and methods described can be appropriate in such circumstances. 2) drinking water supplied for the ongoing operation of key establishments and facilities during a crisis, such as hospitals, homes for the aged, schools, reception facilities and vital plants; 3) water supplied for industrial, agricultural or commercial purposes; 4) water supplied to temporary settlements such as refugee camps; 5) the development and implementation of a crisis management system for water service, which is covered by ISO 24518 and ISO/TS 24520.