CARE-W is a computer-based system for water network rehabilitation planning. It consists of software dealing with fundamental instruments for estimating the current and future condition of water networks, i.e. Performance Indicators, prediction of network failures and calculation of water supply reliability. Furthermore it includes routines for estimating long-term investment needs as well as selection and ranking of rehabilitation projects. These tools are integrated and are operated jointly in the CARE-W prototype, which also contains facilities for use including database, GIS and in- output routines. The results are presented by reports, in tables and by graphics/GIS.