Water's indefinite life versus its container
While pure water (H₂O) is a stable molecule that does not truly expire, the container it is stored in does. This distinction is crucial for understanding the shelf life of any bottled water, including Mountain Valley. The container material and storage environment are the primary factors that influence the water's freshness, taste, and safety over time.
The 'best-by' date explained
Mountain Valley, like many manufacturers, prints a "best-by" date on its packaging, not a hard expiration date. This date serves as a guideline for consumers, indicating the period during which the water is expected to taste its best. It is not an indication of safety risk. The company itself has stated that for plastic bottles, they follow state regulations requiring a two-year date from production.
Mountain Valley packaging: Glass vs. Plastic
The container type has a significant impact on how long the water maintains its quality. Mountain Valley water is available in both glass and plastic bottles, and their properties differ considerably for long-term storage.
Why glass is superior for long-term storage
Mountain Valley's signature glass bottles offer a more inert and protective environment for the water. Glass does not leach chemicals into the water when exposed to heat or sunlight, a primary concern with plastic. This means the water's award-winning taste and purity remain unaltered for a much longer period, potentially for years, if the seal is unbroken and storage is ideal.
Risks associated with plastic bottles
Plastic bottles, typically made from PET, are semi-porous and can degrade over time, especially when exposed to heat and direct sunlight. This degradation can cause microplastics and other chemicals to leach into the water, affecting its taste and potentially posing a health risk at extremely high temperatures. Storing plastic bottles in a hot garage or a sunny car for extended periods is not recommended.
Comparison of Container Types for Bottled Water
| Feature | Glass Bottle (Mountain Valley) | Plastic Bottle (Mountain Valley) | Tap Water (Properly Stored) |
|---|---|---|---|
| Shelf Life (Unopened) | Indefinite (for water) | Up to 2 years (for taste) | 6 months (for optimal taste) |
| Effect of Heat/Sunlight | Minimal | Chemical leaching risk | Minimal (if stored correctly) |
| Container Durability | Brittle, but non-porous | Flexible, semi-porous | Durable (if stored in a safe, food-grade container) |
| Taste Preservation | Excellent, no change | May develop 'plastic' taste | Can become 'flat' or stale over time |
| Environmental Impact | Infinitely recyclable, reusable | Degradable, single-use | Low impact (if using reusable container) |
Best practices for storing Mountain Valley water
To get the most out of your Mountain Valley water, proper storage is key. The International Bottled Water Association (IBWA) and food safety experts recommend the following:
- Keep it cool and dark: Store bottles in a pantry, cabinet, or basement where temperatures are stable and away from direct sunlight.
- Avoid chemicals: Keep water bottles away from household cleaners, gasoline, or other solvents. Plastic is permeable and can absorb odors or chemicals from its surroundings.
- Rotate your stock: If you store water for emergencies, follow the IBWA's recommendation to rotate your supply annually, or the manufacturer's "best-by" date.
- Store opened bottles correctly: Once a bottle is opened, it is susceptible to bacterial contamination. Store opened water in the refrigerator and consume it within a few days for the best quality.
What happens if you drink 'expired' water?
Drinking water that has passed its "best-by" date is generally not a safety issue, especially if it was stored properly. However, you may notice a difference in quality:
- Taste and odor: The most common change is a stale or off-taste, sometimes described as 'plastic-y,' if the water was in a plastic bottle. This is due to the breakdown of the plastic over time.
- Visual cues: If the water appears cloudy, discolored, or has any visible particles, it is best to discard it. While this is rare in properly sealed bottles, it can indicate contamination from a compromised seal or improper storage.
Conclusion
The question of how long is Mountain Valley water good for ultimately depends on its packaging and storage. The water itself is fine indefinitely, but its container dictates the shelf life for optimal taste and quality. Mountain Valley's glass bottles offer a superior choice for those who value long-term purity. By storing your water in a cool, dark place away from chemicals and consuming it within the recommended timeframe after opening, you can ensure a consistently crisp and refreshing experience. For more on bottled water safety, visit the official Mountain Valley Spring Water site.
How to check for compromised water
Even if the water is within its "best-by" date, checking for signs of spoilage is always a good practice. Here’s what to look for:
- Check the seal: Ensure the bottle seal is intact before consuming. A broken seal could allow contaminants inside.
- Smell the water: Pour a small amount into a glass and check for any off-putting odors. Foul or musty smells are a clear warning sign.
- Examine the color: Look for any cloudiness or unusual tinting in the water, which can indicate contamination or algae growth.
- Taste with caution: If it passes the visual and smell test, take a small sip. If the taste is metallic, stale, or unpleasant, discard the rest.
By following these guidelines, you can confidently enjoy the premium quality of Mountain Valley Spring Water, whether it's from a freshly bottled source or one that's been stored for a while.
