Waste saline waters are purified by contacting with a cation exchange resin in hydrogen form, then with a WBA resin and, if desired, with a SBA resin. The cation exchange resin is regenerated with a strong acid reagent. The WBA resin is regenerated with ammonium hydroxide reagent. The SBA resin is regenerated with an alkali metal hydroxide. The residual reagent values in the spent regenerants are applied to the soil as amendments, fertilizer, for pH control, wind erosion control, deicing roadways and in Enhanced Oil Recovery.