AQUAFONDO, the Water Fund for Lima and Callao is a financial mechanism that designs and facilitates governance processes in order to integrate relevant stakeholders of the river basin to promote water security in the metropolitan area of Lima through the implementation of conservation actions. As such, the fund supports public, private and civil society actors to implement measures on water security through nature-based solutions and sustainable watershed management in the three river basins Chillón, Rímac and Lurín. By promoting sustainable investments in ecosystem services the fund supports public policies with a transdisciplinary approach. The projects are financed by voluntary contributions from private companies and international cooperation. AQUAFONDO was created in 2010 with the support of The Nature Conservacy on behalf of the Latin American Alliance of Water Funds and was incorporated as a non-profit civil association in 2016.