Does bottled water go bad?
VERDICT
CONFIDENCE
95%
Direct Answer
Unopened bottled water does not go bad or spoil. Water itself is stable, but bottles can degrade over time, affecting taste or quality. Once opened, bottled water can become contaminated and is best consumed within a few days.
What the Evidence Shows
All sources confirm water itself never expires due to its molecular stability (H2O lacks nutrients for microbes). Issues arise from plastic (PET) leaching chemicals like antimony or microplastics under heat/sunlight, altering taste or quality but rarely posing health risks. Verdict is FALSE as 'go bad' implies spoilage, which does not occur; proper cool, dark storage preserves it indefinitely. Opened bottles risk contamination, lasting 4-6 days.
Why do bottled water bottles have expiration dates?
Dates ensure packaging integrity and optimal taste, per regulations; water itself doesn't expire. Plastic can degrade over time, especially in heat, affecting quality. Sources like IBWA note porosity allows external odors to influence flavor.
Is it safe to drink expired bottled water?
Yes, if unopened, sealed, and stored cool/dark; FDA confirms indefinite shelf life. Discard if off-taste/smell from poor storage indicates leaching. Studies show minor chemical increases but no harm at typical levels.
How long does opened bottled water last?
4-6 days in fridge; contamination risk rises from air/mouth contact. Keep capped, clean hands, cool storage. Beyond that, bacteria may grow if mishandled.
Sources & Methodology
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