CSA ISO 24511:25

CSA Preface This is the second edition of CSA ISO 24511, Activities relating to drinking water and wastewater services — Guidelines for the management of wastewater utilities and for the assessment of wastewater services , which is an adoption without modification of the identically titled ISO (International Organization for Standardization) Standard 24511 (second edition, 2024-02). It supersedes the previous edition, published in 2010 as CSA Z24511 (adopted ISO 24511:2007). This Standard was reviewed for Canadian adoption by the CSA Technical Committee on Water Quality Management Systems, under the jurisdiction of the Strategic Steering Committee on Business Management and Sustainability and has been formally approved by the Technical Committee. This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group. Scope This document provides guidelines for the management of wastewater utilities and the assessment of wastewater services. This document is applicable to publicly and privately owned and operated wastewater utilities but does not favour any particular ownership or operational model. NOTE 1 Wastewater is always generated when water is used or consumed. Accordingly, sources of wastewater can be residential, industrial, commercial or institutional. Collected storm water or (melted) snow can also be considered as wastewater, as it often carries contaminants and pathogens picked up from air or ground surfaces on its way to a collection system. In certain circumstances, especially in undeveloped areas, sanitary waste is collected in an undiluted form. This document addresses wastewater systems in their entirety and is applicable to systems at any level of development (e.g. pit latrines, on-site systems, networks, treatment facilities). The following are within the scope of this document: — the definition of a language common to different stakeholders; — objectives for the wastewater utility; — guidelines for the management of wastewater utilities; — service assessment criteria and related examples of performance indicators, all without setting any target values or thresholds. The following are outside the scope of this document: — methods of design and construction of wastewater systems; — regulation of the management structure and the methodology of wastewater service activities of operation and management; — regulation of the content of contracts or subcontracts; — topics related to the systems inside buildings, between the point-of-discharge and the point-of-collection.