The data and measurements collected by the control stations will be transmitted wirelessly via UHF Radio Modem to the Central Control Station, which will have the overall oversight of the system. The System will consist of the Central Control Station (CCS), of 29 Local Control Stations (LCS), which will be installed in 10 tanks, 10 drillings, 1 pumping station, 2 branch stations and 6 mixed stations (Drilling and Tank).The data ​​collected by the LCSs will be transferred to the Central Control Station (CCS), by wireless communication via RF Modem that will be installed at the Control Stations. In addition, in the Internal Water Supply Network (IWSN) of Hersonissos and Malia will be installed three (3) Local Pressure Control and Regulation Stations, five (5) Local Pressure Control Stations as well as five (5) Local Stations and Supply. The values ​​collected by the IWSN stations will be transferred to the Central Control Station ,by wireless communication through the GSM / GPRS communication network.