How long does distilled water last?

How long does distilled water last?

Although distilled water is not intended for drinking, it makes sense to have it covered on the website. Many people don’t know how to store distilled water, particularly first-time buyers. They also don’t know how long they can keep it before throwing it out. It covers storage, shelf life, and how to store distilled water.

This article contains advice for anyone who uses distilled water to power household appliances or motor industry work (e.g. refilling batteries with electrolytes). This article is not intended to be used for medical purposes. In case you were wondering if drinking distilled waters is safe, it is. However, switching to distilled water is not recommended.

Distilled Water

Distilled Water 

Distilled water is steam made from boiling water. It’s then cooled and brought back to its liquid state. Distilled water is claimed to be the purest water that one can consume.

Boil water is water that has been heated to boiling point. This heat kills many bacteria that can cause illness. Distilled water refers to water that has been filtered of all impurities including microorganisms.

How to store distilled water?

High-density polyethylene containers

If you are to pick a container, make sure it is a glass one to store the distilled water. Plastic containers can leach chemicals into the water. High-density polyethylene containers and tanks are a great alternative to plastic ones. Many companies that sell distilled water use them. Here are some ways to store distilled water and details of its shelf life in different conditions.

In The Fridge – How long does distilled water last in the fridge?

How long does distilled water last in the fridge

You don’t need to have complicated storage methods or special equipment. It can be stored in the refrigerator or pantry, away from direct sunlight, and in a clean container.

Unopened distilled water has a shelf life of more than 2 years if stored in the pantry, and 3 years if stored in the fridge. If you plan to use the water in your home appliances, we recommend a shelf life of 3 years.

Opened Bottle Of Distilled Water – How long does distilled water last once opened?

How long does distilled water last after being opened

An open container of distilled water does not need to be refrigerated. However, it is important that you properly store it. Distilled water, unlike traditional water containers, is more likely to absorb minerals from its container. It is therefore important to store it properly.

There are many ways to store distilled water after it has been opened. If you don’t store it correctly, it may not be safe to drink or for any other purpose. Distilled water, while theoretically water can be stored for an indefinite period of time, requires more care.

  • Before you store your opened distilled water, it is important to ensure that the seal is tight. Distilled water can pick up odors from other water sources, just like any other water. Also, you shouldn’t store it near odorous cleaning chemicals, such as bleach, it might pick up an odd smell.
  • It is equally important to consider where you store your distilled waters. While you can store your distilled waters in a refrigerator it is not necessary. Your distilled water will keep as long as you store it in a cool and dark place.
  • Finally, it is important to choose the right container for your distilled water. You might store large quantities of distilled water for home appliances such as a humidifier or CPAP machine.

Expired Bottle Of Distilled Water – How long does distilled water last after expiration date?

How long does distilled water last after expiration date

Distilled water in bottles usually has a best-before date. It should last for many years as long as it is not opened and stored properly. It’s a good place to start checking for its condition and if the label has an expiration date. It usually lasts 3 to 5 years after the date of production. Water should still be perfectly clear after a few months.

Opened Distilled Water In Fridge – Does distilled water have to be refrigerated after opening?

Keep distilled water out of direct sunlight. This could make it easier to harbor bacteria or other substances in the water container.

Your distilled water can be stored in a refrigerator but this is not necessary. It is safer to store it in the refrigerator like usual water than to put the container in sunlight or other hot atmospheres. Your distilled water will keep as long as you store it in a dark, cool place.

Can distilled water grow bacteria? How to tell if distilled water is bad?

Distilled water is devoid of any minerals or contaminants, and it tastes bland. It is possible to taste the water and not know if it has gone bad.

Your senses are still the best way of determining the quality and safety of your water. These tips will help you determine if your distilled water is safe in case you are using it for drinking purposes or should be thrown out.

1. Spoilt Smell

A bad sign is a strong smell in food and drinks. Distilled water should not be smelt like that. Water can sometimes pick up the scent of the bottle, and you may mistakenly believe that the water is unsafe to drink.

Pour some of the distilled water into a glass and give it a sniff. If you notice a fishy odor, it is best to throw it out and get new water.

2. Green Algae

green algae in distiled water

Green algae is a type of contaminant, which forms when nutrient-rich water is exposed to direct sun. Although distilled water may not contain nutrients or minerals, contaminants can still get into the water bottle and cause algae growth, especially if the water is stored in direct sunlight. You should discard any water that has blue-green scums and sediments.

3. Different Taste

It is possible that the water has a bad smell. Pure distilled water has no distinct taste. This is because all minerals have been removed.

If your water has a chemical flavor, it may not be pure. It could have picked up contaminants and smells from the air. These impurities can be broken down by sunlight and oxygen, which will give the water a strange chemical flavor.

4. Cloudiness

How to tell if distilled water is bad

Clear water should look clean. You can use distilled water that is cloudy in your home appliances, but it shouldn’t be a problem.

If you are used to drinking distilled water, cloudy water is not recommended. The presence of cloudiness can indicate that chemicals or pathogens have contaminated the water.


  • Unopened distilled water lasts for between 3 and 5 years. For more information, refer to the label.
  • You should drink the water within five to seven days if you intend on drinking it. It should be stored in a sealed container for at least one year if it is going to be used in other electronic appliances.
  • For best results, store distilled water in glass containers or HDPE bottles. The water will retain a small number of chemicals if it is stored in plastic containers.
  • Keep the container closed, out of direct sunlight, and at a cool temperature.

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