The anticipated knowledge and assessment of social and economic costs of certain sewer network rehabilitation, according to certain local scenarios, can be a useful tool to support decision-making.

The final aim of this work package was to provide the rehabilitation manager with a battery of indicators directed to gauge the weight of socio-economic costs of wastewater system malfunction.

This implied the development of analysis and methodologies, directed to an exhaustive identification of the variety of social and economic social costs, according to several local situations. A selection of sites or areas, viewed as examples of typical situations and as case-studies, is fundamental to this analysis.