Mapping the potential for nature-based solutions (NBS) is part of getting support in convincing local governments to incorporate them. NBS can be designed for assessing water availability and demand. Dr. Jan Friesen, from the Helmholtz Centre for Environmental Research in Leipzig (UFZ), is leading cross-cutting research on the urban archetype concept to map data at the block-level for assessing and comparing water-treatment NBS effects: a planning tool that combines and processes land-use, rainfall distribution and urban water networks information. In parallel, the Ho Chi Minh City University of Technology (HCMUT), is experimenting with the implementation of such a tool at the Ho Chi Minh district and block-level. This work is being developed within the framework of the EU H2020 NICE sister’s project, ModULar Tools for Integrating enhanced natural treatment SOlutions in URban water CyclE (MULTISOURCE), and highlights the joint recent efforts to foster commitment and common goals to mitigate urban wastewater pollution in urban areas. In synergy with the NICE Project, our speakers will offer an overview on how to effectively plan and support decision-making for water reuse and a circular urban water cycle, based on NBS that captures, retains and treats water.