A water leak control system, comprising: a leak sensor, comprising: a membrane sensor comprising a nonconductive membrane with a plurality of perforations superimposed upon a gap between an anode and cathode array in an electrical circuit affixed to the underside of said membrane, such that a conductive fluid will be drawn through perforations into the gap thereby closing the electrical circuit; a leak sensor microcontroller adapted to detect and generate a first signal when said electrical circuit is closed; and a leak sensor wireless transceiver coupled to the leak sensor microcontroller adapted to transmit the first signal; and; a water control unit, comprising a piping segment coupling the water control unit to a pre-existing water supply pipe; an ultrasonic flow sensor; a valve and actuator assembly; a water control unit microcontroller electronically coupled to the ultrasonic flow sensor to (i) collect and encode sensor data generated by the ultrasonic flow sensor into a format suitable for transmission and (ii) upon receipt of the first signal, commands the valve and actuator assembly to close the valve; a power supply comprising a rechargeable battery; a microturbine electrically coupled to and which recharges said power supply; and a water control unit wireless transceiver coupled to the water control unit microcontroller; and a gateway comprising a network server and a gateway wireless transceiver, wherein said network server is adapted to electronically communicate with a remote user application; wherein said gateway wireless transceiver is adapted to communicate with said leak sensor wireless transceiver and said water control unit wireless transceiver; and a remote user application in electronic communication with said gateway. a leak sensor, comprising: a membrane sensor comprising a nonconductive membrane with a plurality of perforations superimposed upon a gap between an anode and cathode array in an electrical circuit affixed to the underside of said membrane, such that a conductive fluid will be drawn through perforations into the gap thereby closing the electrical circuit; a leak sensor microcontroller adapted to detect and generate a first signal when said electrical circuit is closed; and a leak sensor wireless transceiver coupled to the leak sensor microcontroller adapted to transmit the first signal; and; a membrane sensor comprising a nonconductive membrane with a plurality of perforations superimposed upon a gap between an anode and cathode array in an electrical circuit affixed to the underside of said membrane, such that a conductive fluid will be drawn through perforations into the gap thereby closing the electrical circuit; a leak sensor microcontroller adapted to detect and generate a first signal when said electrical circuit is closed; and a leak sensor wireless transceiver coupled to the leak sensor microcontroller adapted to transmit the first signal; a water control unit, comprising a piping segment coupling the water control unit to a pre-existing water supply pipe; an ultrasonic flow sensor; a valve and actuator assembly; a water control unit microcontroller electronically coupled to the ultrasonic flow sensor to (i) collect and encode sensor data generated by the ultrasonic flow sensor into a format suitable for transmission and (ii) upon receipt of the first signal, commands the valve and actuator assembly to close the valve; a power supply comprising a rechargeable battery; a microturbine electrically coupled to and which recharges said power supply; and a water control unit wireless transceiver coupled to the water control unit microcontroller; and a piping segment coupling the water control unit to a pre-existing water supply pipe; an ultrasonic flow sensor; a valve and actuator assembly; a water control unit microcontroller electronically coupled to the ultrasonic flow sensor to (i) collect and encode sensor data generated by the ultrasonic flow sensor into a format suitable for transmission and (ii) upon receipt of the first signal, commands the valve and actuator assembly to close the valve; a power supply comprising a rechargeable battery; a microturbine electrically coupled to and which recharges said power supply; and a water control unit wireless transceiver coupled to the water control unit microcontroller; and a gateway comprising a network server and a gateway wireless transceiver, wherein said network server is adapted to electronically communicate with a remote user application; wherein said gateway wireless transceiver is adapted to communicate with said leak sensor wireless transceiver and said water control unit wireless transceiver; and