In this study, we intended to clarify the effect of various treatments such as magnetic and ultraviolet light irradiation on acidic electrolyzed aqueous solutions and alkali halide aqueous solutions. The results indicated that the available chloride concentration of acidic electrolyzed aqueous solution was decreased by these treatments. It was proved that hydroxyl radicals and bound water varied by these treatments in the alkali halide aqueous solution. It was proved that the most effective treatment in aqueous solutions relates to the salt concentration in both the acidic electrolyzed aqueous solution and the alkali halide aqueous solution.