Water Treatment | Safe Drinking Water | Red Cross
Let it cool at least 30 minutes. Water must be cool or the chlorine treatment described below will be useless. Add 16 drops of liquid chlorine bleach per gallon of water, or 8 drops per 2-liter bottle of water. Stir to mix. Sodium hypochlorite of the concentration of 5.25% to 6% should be the only active ingredient in the bleach.