Waters cross national and administrative borders, so the states must cooperate for an integrated and sustainable management of water resources. Joint management of transboundary water issues has a long tradition in Europe. There‟s an obvious growing concern for the protection and improvement of water quality at the global level, especially in the context of climate change and population growth. In Europe, the current water policy (the Water Framework Directive and the Floods Directive) accelerated the process of integrated management of transboundary waters. Thus, cross-border cooperations appears to be an essential component with the need of defining common principles for EU‟s Member States in order to improve water protection and the management of cross-border water issues. The paper presents Romania‟s cooperation in the field of water management with the neighboring countries, mainly bilateral cooperation, but also in European context (with member states and non-member states), with the possibility of financing joint projects through the various Europena Territorial cooperation programmes.