Keep at least a three-day supply of water per person.

Store one gallon of water per person per day. (two quarts for drinking, two quarts for each person in your household for food preparation/sanitation)

Store water in plastic containers such as soft drink bottles. Avoid using containers that will decompose or break, such as milk cartons or glass bottles. A normally active person needs to drink at least two quarts of water each day. Hot environments and strenuous activity can double that amount. Children, nursing mothers, and ill people will also need more.