The availability of on-line data coming from the water distribution systems (WDS) allows the monitoring of such critical infrastructures. Nevertheless the huge amount of data that come to the control centre implies an enormous processing challenge [4]. The use of data avoids any physical theory and relies on statistical correlations and inferences. Nevertheless the previous efforts in modelling the networks encourage the companies to fusion information coming from both sources. Models help validating data and data update these models. This paper presents the first stage of an ongoing project focused in the integration of data and models. Data are collected, harmonised and validated using the models so that they will be used in following stages of the project for the supervision of the WDS (water balance and quality). A tool is being developed in R where the different modules will be integrated.