Yes, you can generally drink water that is old, provided it has been stored properly. The primary concern with old water is not its age but how it was stored and whether contaminants have been introduced. Properly stored water remains safe to drink for extended periods.
Is Old Water Safe to Drink? Understanding Water Storage and Safety
Many people wonder if drinking water that has been sitting around for a while is safe. The good news is that water itself doesn’t "spoil" in the way food does. However, the container and storage conditions play a crucial role in its safety. If water is stored in a clean, sealed container away from contaminants, it can remain potable for a very long time.
What Makes Water Unsafe to Drink?
The safety of old water depends on several factors, primarily related to contamination. Water can become unsafe if:
- The container is compromised: If the container is not airtight, bacteria, mold, or other microorganisms can enter.
- It’s stored improperly: Exposure to sunlight, heat, or chemicals can degrade the water or the container.
- The container itself leaches chemicals: Certain plastics, especially when old or exposed to heat, can leach chemicals into the water.
- It’s stored in an unsanitary environment: Proximity to sewage, chemicals, or pests can lead to contamination.
Bottled water, when sealed and stored correctly, has a surprisingly long shelf life. Manufacturers often put expiration dates on bottled water, but these dates typically refer to the quality of the bottle, not the water itself. Over time, plastic bottles can degrade and potentially leach chemicals.
Understanding Expiration Dates on Bottled Water
You’ll often see expiration dates on bottled water. These dates are not about the water becoming unsafe to drink but rather about the integrity of the plastic bottle.
- Plastic Degradation: Over time, especially when exposed to heat or sunlight, the plastic can break down. This can lead to a slight plastic taste and, in some cases, the leaching of chemicals like BPA or phthalates into the water.
- Taste and Quality: While the water might still be safe, the taste can be affected by the degrading plastic.
- Manufacturer Recommendations: Bottlers recommend consuming the water by the date on the bottle to ensure the best taste and to minimize potential exposure to leached chemicals.
For long-term water storage, such as for emergency preparedness, using food-grade plastic containers or specialized water barrels is recommended. These are designed to withstand longer storage periods without degrading.
How to Safely Store Water for Long Periods
Proper storage is key to ensuring that old water remains safe and palatable. Here are some best practices:
- Use appropriate containers: Opt for food-grade plastic containers (like those specifically designed for water storage), glass, or stainless steel. Avoid old, single-use plastic bottles.
- Keep it sealed: Ensure containers are tightly sealed to prevent airborne contaminants from entering.
- Store in a cool, dark place: Avoid direct sunlight and high temperatures, which can accelerate plastic degradation and encourage microbial growth. A basement or pantry is ideal.
- Maintain cleanliness: Regularly clean and sanitize storage containers, especially if you refill them.
- Consider water treatment: For very long-term storage (years), adding a water preservative or using purification tablets can help inhibit microbial growth.
Signs Your Old Water Might Not Be Safe
While water doesn’t spoil, there are signs that indicate it’s no longer safe or pleasant to drink:
- Cloudiness: If the water appears cloudy or murky, it could indicate bacterial contamination or sediment.
- Unpleasant odor: A musty, metallic, or chemical smell is a strong indicator that something is wrong.
- Strange taste: Any off-taste, such as plastic, metallic, or chemical flavors, suggests a problem.
- Mold or visible particles: Any visible growth or foreign particles mean the water is contaminated.
- Damaged container: A cracked, bulging, or leaking container is a red flag.
If you encounter any of these signs, it’s best to err on the side of caution and discard the water.
Long-Term Water Storage vs. Everyday Old Water
There’s a distinction between water you’ve had in a bottle for a few months and water specifically stored for emergencies.
Emergency Water Storage Guidelines
For emergency preparedness, the U.S. Federal Emergency Management Agency (FEMA) recommends storing at least one gallon of water per person per day for at least three days.
| Storage Duration | Container Type | Recommended Treatment |
|---|---|---|
| 6 months – 1 year | Food-grade plastic, glass, stainless steel | Clean container, tightly sealed |
| 1 – 5 years | Specialized water barrels, heavy-duty jugs | Clean container, tightly sealed, cool dark storage |
| 5+ years | Specialized water barrels, stainless steel | Clean container, tightly sealed, cool dark storage, preservative |
Key takeaway: For everyday scenarios, water in sealed bottles stored reasonably well is likely fine for a year or two. For planned long-term storage, invest in appropriate containers and follow best practices.
What About Water from the Tap?
Tap water that has been sitting in a glass or pitcher on your counter for a day or two is generally safe to drink, but its quality can decline.
- Taste: The chlorine used to disinfect tap water can dissipate over time, leading to a "flat" taste.
- Recontamination: Once exposed to the air and the environment of your kitchen, tap water can pick up airborne particles or bacteria.
- Best Practice: It’s best to drink tap water within 24 hours of pouring it into a glass or pitcher for optimal taste and to minimize potential recontamination.
Frequently Asked Questions About Drinking Old Water
### Can I drink bottled water that expired 5 years ago?
While the water itself might still be safe, the plastic bottle it’s in has likely degraded significantly over five years. This degradation can lead to a plastic taste and potentially leach chemicals into the water. It’s generally advisable to discard bottled water that has expired that long ago, especially if it was not stored in ideal cool, dark conditions.
### Does old water in a plastic bottle cause cancer?
The concern with old plastic bottles is the potential leaching of chemicals like BPA or phthalates, especially when exposed to heat or sunlight. While studies on the direct link between drinking from degraded plastic bottles and cancer are ongoing and complex, it’s a precautionary principle to avoid consuming water from very old, compromised plastic containers. Opting for glass or stainless steel, or using newer, food-grade plastics, mitigates this risk.
### How long can you safely store water in a plastic jug?
For general use, water stored in a clean, sealed plastic jug in a cool,