Specialty food stores such as health food stores or food storage supply houses as well as sporting goods stores may have foods prepared especially for this purpose. Store a 3-day supply of water for each family member. The needs of each person will differ depending upon age, physical condition, activity, diet, and climate. A normally active person needs to drink at least 2 quarts of water daily. Children, nursing mothers, and ill people need more.
Additional water is necessary for food preparation and hygiene.
At least 2 gallons per person per day should be stored. Water should be stored in clean and sanitary containers. Plastic containers are good because they are lightweight and unbreakable. Metal containers should be considered as a last resort because they may corrode and tend to give water an unpleasant taste. Purifying contaminated water.