Demand Management for Sustainable  Water Supply – A Case Study Dr. Shaul Manor Senior Consultant – Culture of Water The Peres Center For Peace Abstract As a result of a growing demand for water by the urban, industrial and commercial sectors, the amount left for irrigation is reducing gradually. Moreover, a steady process of contamination of above and below ground water sources, leads to further reduction of the water supply available for agriculture and other users. The forecast indicates a dramatic reduction of the available water for irrigation both in terms of quantity and quality already in the near future. The relation between Rural-Urban demand as may exist in a spatially defined environment, is demonstrated in this paper followed by a case study. This interaction is an extremely important issue, particularly in a region with limited water supply. The main objective thus was -- taking into consideration that the fresh water resources would be allocated mostly to domestic water supply -- to obtain properly treated wastewater in exchange for the fresh water currently being used for irrigation. The case study presented describes the approach taken in order to achieve an appropriate solution to sustainably meeting the demand for water by all consumers, the process of implementation, and problems and achievements. In the future the main source of water for irrigation would be reclaimed sewage water.