Abstract: Electrolytic water produced by controlling the electrolytic degree of electrolytic water discharged from an electrolyzer having anode and cathode chambers partitioned by an ion-permeable barrier membrane so as to produce electrolytic water having the desired pH value in accordance with the pH value, electric conductivity, oxidation-reduction potential, and ion concentration. The electrolytic degree of the electrolytic water is controlled by injecting a regulated electrolyte solution into raw water to be supplied into the electrolyzer, regulating the flow quantity of the raw water and/or the electrolytic water discharged from the electrolyzer, and/or varying the capacity of the anode and/or cathode chamber.

Abstract: An apparatus producing continuously electrolyzed water is so constructed that the ratio R.sub.2 /R.sub.1 of the intake amount of cathode water containing abundantly alcali ions to the intake amount of anode water containing abundantly acid ions with respect to that of city water supplied to the electrolytic cell is increased.