In spite of the fact that the Amazon is rich in water resources, its population has difficulty in gaining access to drinking water. The water supply in the islands of Belém (PA) is deficient. Local alternatives that guarantee access to water in adequate quantity and quality represent major challenges. The objective of this paper is to present an experience of integrating two graduate programs in the implementation of alternative rainwater use for potable purposes in order to contribute to the sustainability of the local supply. The socioeconomic characterization and diagnosis of water supported the deployment of the systems. Sustainability was verified by considering the acceptability of and the access to the system, as well as the financial impacts of the water quality standards. In general, the adopted models are positive with respect to the provision of water supply to the riverine populations of the Amazon.