Water stored this way is usually safe for a few days. If you are able to keep the water cold, it is probably safe for about a week. Bath tubs and sinks can be filled with water for emergency use. This would be a good source of water for cleaning dishes and bathing. For long term storage of drinking water, such as in preparation for unexpected emergencies, purchase bottled water.
Bottled water is prepared under controlled conditions and is available in sealed containers.
Once a year, check stored bottled water to make sure it has not expired. Unless you are certain that the available water supply is safe, disinfect the water before drinking or using it to prepare food. This includes water that comes from a household plumbing system or that has been stored. Bacteria and other microorganisms can get into water from the air, a container, or other sources. Given adequate time, these microorganisms will grow and multiply, and can make water unsafe to drink.