Does Opened Bottled Water Go Bad?

By Staff WriterLast Updated Mar 29, 2020 7:29:59 PM ET

Environmental factors, packaging and processing methods limit the shelf life of water in both opened and unopened bottles, although the United States Food and Drug Administration has no regulations regarding how long bottled water is good to drink. In general, refrigerated open bottles of water are good for about 3 days, while unrefrigerated open bottles of water only last a few hours.