The scenario-generation part of ALLOWS is GIS-based and relies on data that can be mapped. ALLOWS-tool requires five different databases of the settlement: 1) Primary geo-database (geographical data, satellite imaging, open access data on the land surface, physical infrastructures, water bodies etc.), 2) Secondary geo-database (detailed information on physical infrastructures like housing and buildings, streets and already existing wastewater infrastructures), 3) Water database (information on water supply and conveyance, water consumption, connection degree to piped water supply and wastewater disposal, wastewater production, wastewater composition etc.), 4) Technological database (wastewater collection, treatment and reuse technologies, volume or flow, type of effluent, treatment performance, potential risks, O&M requirements, consumable demands, by-products production etc.), 5) Socio-economic database (total population, population growth rates, average household size, land ownership, international and national benchmark prices for all costs associated with technological database like treatment unit, network components, pumping and lifting stations, operation and maintenance costs, labor costs for construction, electricity and water costs, sludge disposal, monitoring costs, etc.). Within the PAVITR Project, it is aimed to generate the first three databases through remote/satellite data. Remaining two databases (technological and socio-economic database) will be generated through local and global data.