The present disclosure relates to device suitable for producing an aqueous liquid having a desired concentration of FAC wherein the device is adapted to receive municipal water from a municipal water supply, and for the aqueous liquid having the desired concentration of FAC to exit the device from an exit section, wherein the device comprises, a container, a mixing unit, a pumping means, an electrochemical chamber, a flow signal unit, a sterile filter unit, connecting means for transporting liquids, and a control system. In particular, water for disinfection in a desired concentration of FAC can be made using the device.
