The FDA requires bottled water to have an expiration date—not because the water rots, but because of packaging. Over time, plastic bottles can leach chemicals like antimony or bisphenol A (BPA) into the water. Think of it as the bottle slowly having a tiny meltdown, and you don’t want that in your kidneys.
But here’s the ironic kicker: if you store your water in a cool, dark place—say, a basement or a closet—that plastic stays stable for years. The FDA’s date is more of a “guarantee of quality” than a safety threshold. You could drink “expired” water today and be fine, as long as it doesn’t taste like a plastic factory.
What actually happens after the expiration date?
Mostly, the water starts tasting flat or stale. That’s because over time, air sneaks through the plastic (yes, plastic is porous on a microscopic level), and the water absorbs weird odors from its surroundings. If you left that bottle next to a bag of onions, guess what? You’re now drinking onion-flavored water. Yum.
Another fun fact: microplastics can increase in bottled water over time. A 2018 study found that water stored for long periods had more plastic particles. But don’t panic—the levels are still low, and your body deals with them. It’s like a free, unwanted side of fiber.
