BS ISO 24511:2007

Foreword
Introduction
0.1 Water issues: global context and policies
    framework
0.2 Water utilities: general objectives
0.3 Objectives, content and implementation of this
    International Standard
0.4 Wastewater services
1 Scope
2 Terms and definitions
3 Components of wastewater systems
  3.1 General
  3.2 Types of wastewater systems
  3.3 Centralized/decentralized systems
  3.4 On-site-systems
  3.5 Disposal/reuse of residues
4 Objectives for the wastewater utility
  4.1 General
  4.2 Protection of public health
  4.3 Meeting users' needs and expectations
  4.4 Provision of services under normal and
      emergency situations
  4.5 Sustainability of the wastewater utility
  4.6 Promotion of sustainable development of
      the community
  4.7 Protection of the environment
5 Management components of a wastewater utility
  5.1 General
  5.2 Activities and process management
  5.3 Resources management
  5.4 Asset management
  5.5 Customer relations management
  5.6 Information management
  5.7 Environmental management
  5.8 Risk management
6 Guidelines for the management of wastewater
  utilities
  6.1 General
  6.2 Organization
  6.3 Planning and construction
  6.4 Operations and maintenance
7 Assessment of water services
  7.1 General
  7.2 Assessment policy
  7.3 Goal and scope of the assessment
  7.4 Parties involved in the assessment
  7.5 Methodology of assessment
  7.6 Service assessment criteria
  7.7 Resources to conduct the assessment
  7.8 The production of output and recommendations
      for the use of the output
8 Performance indicators
  8.1 General
  8.2 Performance indicators systems
  8.3 Quality of the information
  8.4 Example of a performance indicator
Annex A (informative) - Tables of corresponding terms in
                        English, French and Spanish
Annex B (informative) - Schematics of wastewater systems
Annex C (informative) - Possible actions to achieve the
                        objectives of the wastewater utility
Annex D (informative) - Possible actions related to the
                        management of the wastewater utility
Annex E (informative) - Examples of service assessment
                        criteria related to the wastewater
                        utility objectives, performance
                        indicators related to assessment
                        criteria, and service assessment
                        criteria related to components of
                        a wastewater system
Annex F (informative) - Example of confidence-grading
                        scheme for performance indicators
                        systems
Bibliography

Gives guidelines for the management of wastewater utilities and for the assessment of wastewater services.

This International Standard provides guidelines for the management of wastewater utilities and for the assessment of wastewater services.

This International Standard is applicable to publicly and privately owned and operated wastewater utilities, but does not favour any particular ownership or operational model.

NOTE1 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 International Standard 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 International Standard:

• 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 International Standard:

• 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.

NOTE2 This International Standard, ISO24510 and ISO24512 comprise a series of standards addressing water services. It is therefore advisable to use these three International Standards in conjunction with each other.

NOTE3 The list of terms and definitions in Clause2 is common to this International Standard, ISO24510 and ISO24512.

NOTE4 AnnexA contains three tables of correspondence between equivalent terms in English, French and Spanish.