Intergroup contact, the practice of bringing together adversary groups in a friendly setting, is a widely studied field in Peace and Conflict Studies. However, studying this practice against the backdrop of shared environmental issues in an intractable conflict zone is rather rare in academia. The present thesis aims to study the potential of intergroup contact on grassroot level based on shared environmental issues towards positive outcomes of those encounters. Looking at environmental peacebuilding from the theoretical perspective of intergroup contact, the thesis scrutinises the case of the Water Diplomacy Programme by the regional NGO EcoPeace Middle East. Jordanian, Palestinian, and Israeli environmentalists work jointly together on projects across divided borders. The single case study is based on nine qualitative interviews with Jordanian and Israeli participants of the programme and one EcoPeace staff member which are analysed through a directed content analysis. The findings display that the conditions and processes of intergroup contact are partly met in the programme and generally have the potential to result in positive outcomes. EcoPeace’s practice of solely focusing on the environment in the workshops is challenged by participants since personal ties and considering the conflict situation are deemed as crucial to reach the core of the conflict.