Do not use scented bleaches, color-safe bleaches, or bleaches with added cleaners. Add 16 drops of bleach per gallon of water, stir, and let stand for 30 minutes. If the water does not have a slight bleach odor, repeat the dosage and let stand another 15 minutes. If it still does not smell of chlorine, discard it and find another source of water. Other chemicals, such as iodine or water treatment products sold in camping or surplus stores that do not contain 5.25 percent hypochlorite as the only active ingredient, are not recommended and should not be used.
Distillation involves boiling water and then collecting the vapor that condenses back to water.
The condensed vapor will not include salt or other solid impurities. To distill, fill a pot halfway with water. The water that drips from the lid into the cup is distilled. If you question its purity, be sure to treat the water first. Avoid water with floating material, an odor, or a dark color.