This case study seeks to deepen the understanding of how the peacebuilding effects of regional water cooperation can best be harnessed, supported and sustained. It analyses two existing initiatives involving Jordanians, Israelis and Palestinians: the Good Water Neighbors (GWN) project and the Regional Water Data Banks Project. The case analysis focusses on the design and implementation of cooperative processes, as both the form and content of cooperation are critical for peacebuilding. Building on the analysis of the two cases, as well as on broader knowledge on water cooperation, the report concludes with recommendations for funding agencies and third parties.