With the lowest volume of annual renewable water resources and of water resources per capita, the Middle East and North Africa is the most water-scarce region in the world. Moreover, rapid population increase, economic growth, rising affluence, urbanization and expansion of irrigated lands are drastically increasing the demand for water, while climate change is negatively affecting the supply. Over the past decade, International Development Research Centre and several partners have supported numerous research projects and a network of researchers on water demand management (WDM).