ISO 24527:2020 pdf download

ISO 24527:2020 pdf download

ISO 24527:2020 pdf download.Service activities relating to drinking water supply, wastewater and stormwater systems — Guidelines on alternative drinking water service provision during a crisis
1 Scope
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.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 24513, Service activities relating to drinking water supply, wastewater and stormwater systems —Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 24513 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
4.1 General
In order to determine its ADWS provision, a drinking water utility should first have a clear understanding of its normal operation during typical (non-crisis) circumstances. During a crisis involving an interruption to drinking water distribution, the drinking water utility should ensure an ADWS is provided to users and also ensure that assets which are intended to be used in contact with drinking water are authorized by the relevant authority. Such assets could include cleaned and disinfected drinking water containers. Ideally, users should only take containerized drinking water according to predetermined drinking water allocation(s), see Annex C. However, in practice, with high user demand and limited drinking water utility resources available to control the issuing of drinking water, this can be difficult to achieve. The drinking water utility’s pre-planning of issuing drinking water should aim to ensure a suitable level of control, including a contingency for excessive withdrawals. Inability to exercise such control can lead to legitimate users’ needs remaining unfulfilled. This can have consequences, including a decline in ADWS service levels and financial and reputational impacts. Drinking water utilities can encourage users to exercise restraint by providing adequate public information both in advance of and during a crisis (see Clause 7).