NOVELTY - System comprises: a fresh water or effluent water interconnection (1); an electricity interconnection (2) with an electric grid or electric generation facility; a water filtration and de-mineralization system (3); a fresh or effluent water electrolyzer (4); an electrolyte recovery system; a heat recovery system (5); an interconnection to an alternative hydrogen gas supply; a high pressure underground hydrogen gas storage facility; an underground storage well; a safety valve; an electric generation system; a hydrogen gas outlet; an oxygen transport system; and an oxygen gas transport system.    USE - The system is useful for fresh or effluent water (claimed) treatment.    ADVANTAGE - The system: provides electrolysis of either fresh water or effluent water (water previously used in agricultural, industrial, or residential uses) and electricity to produce oxygen gas, hydrogen gas, and electricity; provides oxygen gas to be used in water treatment, which can be sent to water treatment facilities and be used for the safe combustion of material and toxic waste, where the oxygen gas may also be used to create ozone gas, which can be used for the disinfection of water; and stores compressed hydrogen, created by electrolysis and other methods of hydrogen gas creation underground and generating electricity, while decompressing hydrogen gas.    DETAILED DESCRIPTION - System comprises: a fresh water or effluent water interconnection (1); an electricity interconnection (2) with an electric grid or electric generation facility; a water filtration and de-mineralization system (3); a fresh or effluent water electrolyzer (4); an electrolyte recovery system connected to the electrolyzer; a heat recovery system (5) connected to the electrolyzer; an interconnection to an alternative hydrogen gas supply; a high pressure underground hydrogen gas storage facility; an underground storage well for hydrogen gas; a safety valve connected to the underground storage well; an electric generation system powered by compressed hydrogen gas and a turbine; a hydrogen gas outlet; an oxygen transport system for use with burning solid waste produced at a water treatment facility; and an oxygen gas transport system for use in creating ozone gas for use at a water treatment facility.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of energy storage system with a system of water treatment.    Water interconnection (fresh water or effluent) (1)    Electricity interconnection (2)    Water filtration and de-mineralization system (3)    Electrolyzer or electrolysis machine (4)    Heat recovery system (5)