A Deep Dive Into Storing Water for Emergencies

With the second “boil water” advisory in Richmond in less than a year, many Virginians are wondering how they can store water safely should the same thing happen in their part of the state.

The good news is that water never “expires,” but the containers might, and the flavor may change. For example, water stored in a plastic container will not go bad, but the plastic may start to break down. Water stored in glass containers “theoretically” never goes bad if stored in the right conditions. And, pasteurized water in a glass container can last up to 10 years before it starts to change its flavor, but it never goes bad.

You can also keep a drinking water supply separate from your flushing, washing, or other non-consumable needs.

All stored water should be kept in a cool, dark place away from direct sunlight and heat sources. A conditioned crawl space or storage closet in your home is a good location. The following rules apply to all types of water:

• For short-term storage (1-2 days), keep at room temperature in a clean, covered container.

• For medium-term storage (3-5 days), refrigerate in a clean, sealed container.

• For long-term storage, use a food-grade container, store in a cool, dark place, and consider a water preserver.

  
  

Of note - with the recent “boil water” advisories in Richmond. The issue with the water was a risk of bacterial infection, not impurities. If you have filters on your water, they do not address bacterial issues. So, never think your water is safe if under an advisory. Boil it to brush your teeth or make your own ice. The elderly, babies, and people with compromised immune systems should avoid contact with this water altogether (such as bathing, washing hands, or cleaning dishes, etc.).

Here's what you need to know about storing different types of water for emergencies.

Commercially Bottled Water

Commercially packaged water can be stored for up to 5 years. Check for a "best by" date on the container and remember that the water itself doesn't expire. The date refers to the quality of the packaging, not necessarily the water's safety. 

If your stored water is approaching its “best by” date, you can transfer it to another container. However, the water's flavor will likely change over time. Experts suggest you keep this older water for your non-consumable needs and replenish your drinking water every six months.

Tap Water Stored in Food-Grade Containers

Properly stored and treated tap water can last for an extended period, potentially indefinitely, but it is recommended that it be replaced every 6 to 12 months for optimal taste and freshness.

Use clean, food-grade containers. Big Box stores sell 5 to 55-gallon food-grade containers that can safely store water.

Label the containers with the date of storage and switch out on a schedule. Experts say you may want to consider adding a small amount of unscented household chlorine bleach (1/8th teaspoon per gallon) to disinfect the water if you're unsure of its initial quality or if it's from a non-municipal source like a well.

You can also add a water preserver, like this one, to any stored water. These are liquid additives used to disinfect and extend the safe storage life of water by releasing a controlled amount of sodium hypochlorite (a common disinfectant) to kill bacteria, viruses, and other microorganisms, making the water safe to consume for up to five years. 

Filtered Water

Filtered water can be stored for a few days at room temperature, longer if refrigerated, and significantly longer (up to 5 years) with a water preserver.

Distilled Water

Due to its high purity, distilled water can last indefinitely when stored properly. Be sure to use food-grade containers that previously held non-food substances. Before filling, wash containers thoroughly and sanitize them with a diluted bleach solution.

---

By following these guidelines, you can ensure your stored water remains safe and of good quality for an extended period.  

---

Sources: Olympian Water Testing, Big Berkey Filters, Jordan Valley Water Conservancy, Waterbrick, CDC