Civil Engineering Department, University of Thessaly, GR38334 Volos, Greece water pipe networks and hydrosystems management; water distribution networks management; water balance assessment (water audit); hydraulic simulation and optimization; non-revenue water management (pressure-PMAs/DMAs/Assets management); water pricing; integrated water resources management; drinking water quality modelling; water conservation; WFD 2000/60/EC implementation process progress auditing and evaluation (ex-ante, on-going, ex-post); full water cost analysis