The world-wide crisis of water will make that the transboundary water resources will be the object of tensions and litigations increasingly marked. Also, the transboundary conflicts on fresh water intended to the categories of traditional uses are subjected to a growing attention on behalf of national and international organizations. Each case of conflict, related as well to surface water as groundwater, has its accurate characteristics and to appreciate its relative importance, it is necessary to consult a broad documentation based on reports of commissions, organizations or groups of research. According to criteria and data taken into account, the situation is some times appreciated differently.