o appropriate systems that include community management and encompass a diverse range of delivery options. This means that all stakeholders need to be better informed and included in decision making. In addition to large, hi-tech projects, small, community projects must be considered - various scales are required. Sustainability is about diversity and the overall scope of management must be broadened to better include the social dimensions of water systems. External systems or stresses will be the main change drivers, and of those climate is likely to be the most significant. In Australia for example, droughts and water stress in the main cities of Melbourne, Sydney, Adelaide and Perth have forced the adoption of a whole new range of approaches to managing water. These are based much more on the concepts of reuse, recovery and matching water quality to particular water use, and on educating users (CSIRO, 2004). It could be argued that Australia is currently in the vanguard of innovative water service provision in the developed world. Sectoral scope The sectoral scope of this report is principally urban water services and to a lesser extent rural water services. However, with some 75% of the world's water being used for agriculture, there are issues of allocation and competition for resources (quantity) as well as water quality. Thus agricultural consumption cannot be ignored, even if in-depth consideration of the infrastructure needed for irrigation lies outside the scope of this report. In addition, there are a lot of dual-use water resources and hydropower schemes with many more now envisaged as part of the ambitions of the MDGs. These will not be considered in detail here due to their variability. Water supply and wastewater management infrastructure for urban areas comprise four major systems: 1. Water abstracted for agricultural use - for rural communities and small urban areas. Most of this is groundwater. INFRASTRUCTURE TO 2030: TELECOM, LAND TRANSPORT, WATER AND ELECTRICITY - ISBN 92-64-02398-4 - © OECD 2