In order to study how information and technology can be used to improve water management, smart grid technologies were introduced into the water industry. This paper describes a project to integrate GIS, SCADA and online hydraulic model to assist water engineers in assessing the water distribution system. The integrated system simulates the flow and concentration of chemical contaminants online in municipality's water distribution system. The integrated system is a powerful tool for routine planning and emergency response and also for remote leakage detection and prediction of pipe burst. The capabilities of the integrated system can greatly assist in the decision making processes for network asset inventory, rehabilitation requirements, and financial planning.