UNESCO-IHP is currently implementing the third phase of the project Governance of Groundwater Resources in Transboundary Aquifers (GGRETA-3), funded by the Swiss Agency for Development and Cooperation (SDC). The main goal of the GGRETA-3 is to strengthen regional stability, cooperation and peace through the establishment of cooperative frameworks for transboundary groundwater governance in River Basin Organizations (RBOs), Regional Commissions (RCs) and selected aquifers systems in Africa, Central America and Central Asia. The GGRETA-3 project builds on the results achieved by the previous two phases of the GGRETA project, i.e. Phase 1 (2013-2015) and Phase 2 (2016-2019). The GGRETA-3 approach is addressing the sustainability challenges related to transboundary groundwater resources that many river basins are facing, including the protection of groundwater quality.