Abstract: A smart water management system fixture device is positioned on a water line. The device includes a measuring unit, an electronics unit, and an energy unit associated with a housing. The measurement unit includes an impeller of a turbine disposed in a water chamber and rotatable therein. The water chamber is positioned between an inlet and an outlet to define a fluid flow path. The measurement unit is in communication with the electronics unit. The electronics unit received information from one or more sensors and harvests electricity using the motion of the turbine and is in communication with an energy unit for story electricity.