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Understanding Bottled Water Expiration Dates

Published in Water Safety 4 mins read

Yes, you generally can drink expired spring water, though its taste might be affected over time due to chemical leaching from the plastic bottle.

While bottled water often carries an expiration date, it's important to understand what this date signifies. Unlike perishable food items that spoil, the water itself doesn't "go bad" in the traditional sense. The expiration date on bottled water primarily serves as a warning regarding the container, not the liquid inside.

According to information current as of March 23, 2023, the expiration date indicates when leached chemicals from the plastic bottle will begin to affect the water's taste. It's also worth noting that in the United States, it is legally permissible to sell expired bottled water.

Is Expired Spring Water Safe to Drink?

The consensus is that drinking expired water probably won't harm you, particularly if the water has been stored correctly. The primary concern is typically a change in taste rather than a health risk from microbial contamination of the water itself. Spring water, like other types of bottled water, is purified and sealed, which inhibits microbial growth if the seal remains intact.

What Causes the "Expiration" of Water?

The "expiration" of bottled water largely pertains to the integrity and chemical stability of its packaging. Over time, plastic bottles can leach trace amounts of chemicals, such as polyethylene terephthalate (PET), into the water. This process can be accelerated by exposure to heat or sunlight.

  • Taste Alteration: The most noticeable effect of these leached chemicals is a change in the water's flavor, which some might describe as a "plastic" or stale taste.
  • Not Spoilage: The water itself does not spoil like milk or juice. It does not grow harmful bacteria if kept sealed and properly stored.

Key Considerations for Expired Bottled Water

To help you decide whether to consume expired bottled water, here's a table summarizing important factors:

Feature Description
Safety Generally safe to drink; unlikely to cause harm, especially if stored properly.
Taste May develop an altered or "plastic" taste due to chemical leaching from the bottle.
Legality (US) It is legal to sell expired bottled water in the United States, as the date pertains to quality/taste, not safety.
Storage Proper storage (cool, dark place, away from chemicals) significantly reduces the likelihood of taste degradation and potential leaching.
Purpose of Date Primarily a warning about taste changes from leached bottle chemicals, rather than an indicator of the water's spoilage.

Practical Advice for Consuming Expired Water

When considering drinking expired spring water, exercise common sense:

  • Inspect the Bottle: Check for any signs of damage, cracks, or punctures in the bottle. A compromised seal or damaged bottle could introduce contaminants.
  • Visual Cues: Look for any foreign particles, cloudiness, or discoloration in the water. While rare in sealed bottles, it's a definite red flag if present.
  • Smell Test: Pour a small amount into a glass and smell it. If it has an off-putting or chemical odor, it's best to discard it.
  • Taste Test (Small Sip): If it looks and smells normal, take a small sip. If the taste is unpleasant, stale, or distinctly plastic-like, it's advisable not to drink more.
  • Storage Conditions: Recall how the water was stored. Water exposed to direct sunlight, extreme heat, or stored near strong chemicals (like cleaning supplies or gasoline) is more likely to have absorbed odors or leached chemicals from the plastic.

When to Exercise Caution

While generally safe, there are specific scenarios where you should avoid drinking expired spring water:

  • Improper Storage: If the water was stored in extreme heat (e.g., in a hot car for prolonged periods) or direct sunlight, the rate of chemical leaching increases, and the taste will likely be significantly affected.
  • Compromised Seal: If the bottle's seal is broken or appears tampered with, the water could be contaminated and should not be consumed.
  • Visible Contamination: Any signs of mold, algae, or foreign particles indicate the water is no longer safe to drink, regardless of its expiration date.
  • Strong Off-Flavor or Smell: If the water has a very strong, unpleasant, or chemical taste/smell, it's a clear sign to avoid it.