The invention relates to disposing of unwanted waste waters produced from purifying water. The methods of the present invention include applying waste water containing 0.15% by weight of the salts of Na, K, Ca, Mg, Fe, Cl, SO.sub.4, and CO.sub.3 and mixtures thereof to soil to control dust, effect soil stabilization, seal ponds, inhibit root rot, and irrigate soil. The invention also relates to the utilization of waste waters within cooling towers and for laundry applications.