Bottled water is generally considered good for up to 2 years.
Understanding Bottled Water Shelf Life
While water itself is a natural substance and does not technically expire, the plastic bottles they are packaged in do have an impact on how long the water remains palatable and safe to drink.
Why Bottled Water Has a Shelf Life
- Plastic Leaching: The primary reason for a shelf life recommendation is due to the fact that plastic water bottles leach chemicals into the water over time. This can affect the taste and, in some cases, may raise concerns about the water's safety.
- Taste Alteration: Even if the water remains technically safe, the leaching process can make the water taste "flat" or slightly off, making it less enjoyable to drink.
Recommended Shelf Life
- Still Water: For still, bottled water, a 2-year shelf life is generally recommended.
- This takes into account the potential for plastic leaching.
- It also helps maintain the desired quality of taste.
Factors Affecting Shelf Life
- Storage Conditions: Storage conditions can influence how quickly plastic leaching occurs.
- High temperatures can accelerate this process, reducing the recommended shelf life.
- Direct sunlight can also speed up degradation of the plastic.
- Bottle Material: Different types of plastics may have different rates of leaching, though most commercially available bottled water uses a relatively consistent type of plastic.
Practical Advice
To maximize the quality and longevity of your bottled water:
- Store bottled water in a cool, dark place.
- Avoid storing it near direct heat or sunlight.
- Check the expiration date on the bottle, if available.
- If your bottled water has been stored improperly or is past its recommended shelf life, it's best to err on the side of caution and replace it.
