An apparatus for producing water having dissolved ozone therein of the type direct-connectable to a pressurized-water supply faucet (26) includes a nozzle (5) for directing a flow of pressurized water from the supply faucet (26) to a turbine (1) to effect rotation thereof, the turbine (1) having magnets (13) attached thereto magnetically coupled to corresponding magnets (13) attached to a disc (14) of a power generator (3). Rotation of the turbine (1) is magnetically coupled to the power generator (3) to generate electrical power for supply to an ozone generator to generate ozone for combination with the so-supplied water to produce ozonated water.