How Much Water Should Be In A Bug Out Bag?

How Much Water Should Be In A Bug Out Bag?

I stumbled upon an article that says one of the common mistakes of bug out bag preppers is forgetting water. An average human body can survive about three days without it, but you are most likely to die without proper and adequate hydration.

How much water should be in a bug out bag? It depends on your daily water demand, environment, and even the weight of your bug out bag.

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This article covers why you need to bring water and how much of it should be included in your bug out bag. Read on.

Why Bring Water In The First Place?

The human body is made up of about 70% of water. It is essential in performing different body functions such as blood circulation and digestion.

When your body lacks fluids and electrolytes, the mucus membranes of your body organs dry out, which can induce headaches, fatigue, and dehydration.

So, How Much Water?

To help you answer this question yourself, here are some conditions every individual should consider.

The Federal Emergency Management Agency (FEMA) recommends drinking at least half a gallon of water daily. So if you’re planning to pack a 72-hour BOB, you must find a way to carry at least 1.5 gallons of water.

However, this differs from person to person. As early as now, try to observe how much water you drink every day, then pack more than that, especially if you’re not physically active. You might hike all day or run while bugging out.

Here are some factors that may affect how much water should be in your bug out bag:

1.   Environment

Take consideration of the environment you will probably be staying in. If it’s somewhere in the wilderness, there might be plenty of water resources. Once sure, you can only pack a few liters of water and carry a water filter or purification tabs instead.

However, if you’re uncertain if the area you would move in has an abundant water source, do not take the risk of leaving water behind. A water purification system would be useless if you can’t have access to any water.

2.   Weight Of BOB

Survival experts suggest limiting your BOB weight from 10-20% of your body weight. For instance, if you weigh 50 kilograms, then you should pack a total of 5-10kg. Now you must determine how much water would take from that weight limit.

Related Questions

1. When does dehydration start?

Dehydration can be felt as early as six hours of skipping water. More than 24 hours without water could lead to its severity. Within about three days of lack of water, the human body may not be able to survive.

2. What’s the best way to carry water?

Collapsible containers such as pouches are great choices because they do not take up much space in your BOB, and allow you to carry more. A hydration backpack is also a great way to bring water because it has a separate bag and is carried on your bag.


Water is essential in every BOB. Each individual has a different amount of water intake and environmental conditions. It is also vital to ensure that your bug out bag does not weigh more than 20% of your body weight.