The overall scope is to assess and improve the sustainability of urban water resources and systems with the help of computer tools. The project will analyse a range of existing urban water supply and disposal scenarios by demonstrating how each scenario differs in its handling of contaminants. The sources of contaminants, their flow paths and the sinks will be identified for different urban areas and a quantification of the contaminant loads undertaken. The impact of these contaminant loads on their capability to contaminate groundwater will be estimated. For the verification and validation of the model, detailed field studies will be carried out in 4 case study cities. In addition AISUWRS aims to develop a management and DS system that will make use of innovative pipeline and urban water system assessment procedures to deliver detailed guidelines and recommendations for the safeguarding and protection of urban water resources.