Abstract: Water supply system comprising a unit for converting the wind energy into kinetic energy, a unit for converting the kinetic energy into another usable form of energy and a unit for supplying water driven by that usable form of energy. According to the improvement, the unit for converting the wind energy is a wind motor (1) having rotor blades (41) and a control mechanism (42) for constant load on the rotor blades (41) independently from the wind intensity, the unit for converting the kinetic energy is a device for compressing the air to a pressure greater than that of the atmosphere and the unit for supplying water comprises a natural or artificial source of water such as a well (21) or a container operated by pressurized air and structure for temporary storage of the water and for controlling the water bailing from the source of water.