We just ran across an article from Reader's Digest that cautions against drinking "expired" bottled water. The long and short of it is this – it’s not about the water quality, but the plastic can potentially leach into the water and cause harm.
As is further explained in the article though, the expiration dates on bottled water may not mean much since "the U.S. Food and Drug Administration has never established any specific limitations on the shelf life of bottled water".
Our advice? Be mindful of how long you’ve had unopened bottled water for, and use your discretion before drinking it. And visit our Bottled Water page to learn more.