The fourth stage of the Watersheds and Cities, project was completed at the end of 2021. This project aims to support the initiatives of ten partner organizations, eight of which carried out activities geared towards designing or optimizing governance instruments, community organization, or public policies for the comprehensive management of the watersheds that provide cities with water. The project’s external evaluation demonstrated that the initiatives improved the capacity of 49 institutions to address water-related issues in different regions. The partners in the field mobilized more than 125 million pesos of additional resources to the Gonzalo Río Arronte Foundation, a private foundation that has served as the project’s donor for two decades. The matching funds surpass 19% of what was originally projected, thus demonstrating how much the project has consolidated and the high efficiency that partner organizations attain upon forging alliances based on a common goal.