A system for generating ozonated water comprising, an ozone generating cell (100, 200, 500) having an anode (106, 202, 502) and a cathode (106, 204, 504) separated by a polymer membrane (104, 206, 506), the anode (106, 202, 502) and cathode (106, 204, 504) each have an array of holes (201, 501) to allow water to flow over the membrane (104, 206, 506); a housing having a cathode housing portion and an anode housing portion separated by the membrane(104, 206, 506);, the cathode housing portion enclosing the cathode (106, 204, 504) and configured to allow water to flow across the cathode (106, 204, 504), and the anode housing portion enclosing the anode (106, 202, 502) and configured to allow water to flow across the anode (106, 202, 502), the anode housing portion configured to direct a portion of the water flow through a cuvette (566, 764) of an integrated spectrophotometer integrated within the housing which generates a signal representation of ozone concentration in the water flow from the anode (106, 202, 502); and; a hydrogen water reservoir (306, 706) for receiving water from the cathode (106, 204, 504); an ozone water reservoir (308, 708) for receiving generated ozonated water flow from the anode (106, 202, 502); control circuitry to control the ozone generating cell (100, 200, 500) utilizing the spectrophotometer signal in a closed loop to provide a selected ozone concentration in the ozonated water flow from the anode(106, 202, 502); a pump system (314,714) under control of the control circuitry for pumping water through the cathode and anode (106, 202, 502), and for pumping at least a portion of the ozonated water from the anode (106, 202, 502) through the spectrophotometer to the ozone water reservoir (308,708); and output port coupled to the ozone water reservoir (308,708) to allow ozonated water to flow out of the system for external use. an ozone generating cell (100, 200, 500) having an anode (106, 202, 502) and a cathode (106, 204, 504) separated by a polymer membrane (104, 206, 506), the anode (106, 202, 502) and cathode (106, 204, 504) each have an array of holes (201, 501) to allow water to flow over the membrane (104, 206, 506); a housing having a cathode housing portion and an anode housing portion separated by the membrane(104, 206, 506);, the cathode housing portion enclosing the cathode (106, 204, 504) and configured to allow water to flow across the cathode (106, 204, 504), and the anode housing portion enclosing the anode (106, 202, 502) and configured to allow water to flow across the anode (106, 202, 502), the anode housing portion configured to direct a portion of the water flow through a cuvette (566, 764) of an integrated spectrophotometer integrated within the housing which generates a signal representation of ozone concentration in the water flow from the anode (106, 202, 502); and; a hydrogen water reservoir (306, 706) for receiving water from the cathode (106, 204, 504); an ozone water reservoir (308, 708) for receiving generated ozonated water flow from the anode (106, 202, 502); control circuitry to control the ozone generating cell (100, 200, 500) utilizing the spectrophotometer signal in a closed loop to provide a selected ozone concentration in the ozonated water flow from the anode(106, 202, 502); a pump system (314,714) under control of the control circuitry for pumping water through the cathode and anode (106, 202, 502), and for pumping at least a portion of the ozonated water from the anode (106, 202, 502) through the spectrophotometer to the ozone water reservoir (308,708); and output port coupled to the ozone water reservoir (308,708) to allow ozonated water to flow out of the system for external use.