Water Is Enough Store at least one gallon of water per person per day. Keep in mind that although this is a good estimate, everyone's needs differ depending on age, physical condition, activity, size, diet, and weather. A normally active person needs to drink at least two quarts of water per day. In hot environments twice that amount may be needed. Store more water for children, pregnant women, nursing mothers, and ill people.
Additional water is needed for food preparation and hygiene.
You can reduce the amount of water your body needs by decreasing activity and staying cool. Tiny amounts of the toxic substance can remain in the pores of a plastic container, regardless of how well you clean it. Do not use plastic milk jugs because they are impossible to clean properly, the lids do not seal well, and they are usually made from biodegradable plastics that will break down over time, causing leaks and possibly allowing contaminated air to enter. Finally, do not store water in unlined steel, stainless steel, aluminum, or iron containers because undesirable substances from the containers may leach into the water. Before bottling any water, you will need to wash, rinse, and sanitize the container.