Yes, boiled water can go bad, but not in the way that it spoils like food.
Understanding the Longevity of Boiled Water
While boiling water kills most harmful bacteria and pathogens, it doesn't sterilize it entirely. Over time, especially if not stored properly, boiled water can become re-contaminated. It can also develop a flat taste due to the loss of dissolved oxygen.
How Long Can You Store Boiled Water?
The key to safe storage is proper sealing. According to the provided reference:
You can store boiled water in well-sealed containers for 6 months. Write the fill date on the containers so you know when to refill them. Store at least a 3-day supply of 5 litres of water per day for each person or pet in your home—that's 15 litres of stored water for each person or pet.
This means that, when handled correctly:
- Storage Duration: Boiled water can be safely stored for up to 6 months in sealed containers.
- Importance of Sealing: Proper sealing prevents re-contamination and helps maintain water quality.
- Container Labelling: Always write the fill date on containers to track freshness and plan for refilling.
- Storage Volume: It's important to store enough water; aim for at least 15 litres per person or pet for a 3-day supply.
- Example: If you have a family of four, plus one pet, you should store 75 liters of boiled water at a time, (5 people x 15 liters).
Factors Affecting the Quality of Stored Boiled Water
Several factors can influence how long your boiled water remains safe:
- Container Type: Use food-grade containers, preferably made of glass or high-density polyethylene (HDPE).
- Seal Integrity: Ensure the container seals tightly to prevent contamination from air or pests.
- Storage Conditions: Keep stored water in a cool, dark place to minimize microbial growth and temperature fluctuations.
- Cleanliness: Always clean the container thoroughly before filling with boiled water.
Practical Tips for Storing Boiled Water
To maximize the shelf life and quality of your stored boiled water:
- Boil Properly: Bring water to a rolling boil for at least one minute to kill most harmful bacteria.
- Cool Before Storing: Let the water cool to room temperature before sealing it in containers. This will reduce condensation within the sealed container.
- Use Clean Containers: Sterilize your containers by boiling them in water for a few minutes before use or washing them in a dishwasher.
- Replace Regularly: Even if not used, replace your stored water every six months to ensure freshness and quality.
Conclusion
While boiled water itself doesn't "go bad" in the same way as food, it is not indefinite. By following proper storage guidelines you can ensure that your boiled water stays safe for up to six months. Remember to seal your boiled water in clean containers and store it in a cool, dark place. Keep the fill date on the containers to know when to refill them.
