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.