How to Stockpile Water for Emergencies

One of the greatest challenges to preparing your retreat for when SHTF is knowing how much water to store and how to store it.

In a disaster situation, you never know what may happen to your water sources – you may be unable to collect water for a long period of time, or have to fend off zombies from stealing your water, or may be unable to so much as leave your home. Any number of things could cause you to lose your water sources.

The big questions, then, are how much water should you store, and how do you store it? Planning for the day you can’t turn on your faucet for water will be crucial to your survival in a disaster.

How Much Water Do You Need?

Because you never know what will happen at TEOTWAWKI, we are going to assume that in the event of a disaster, you will be completely unable to access any external source of water. This means you will only be able to live off of your stockpile alone. While this may not be true, it is better to plan for the worst, than to plan for the best.

The first thing to consider when planning how much to stockpile is how much water you (and your family) will need to consume in order to survive. One common mistake a lot of preppers make is hoarding too much food and not enough water. To explain this, we refer to the rule of 3s:

  • You can live for 3 minutes without air.
  • You can live for 3 hours without shelter.
  • You can live for 3 days without water.
  • You can live for 3 weeks without food.

If you’re preparing, now, though, you have the luxury of being able to plan to have all four of these things. But taking one for granted and over preparing for the others could be a fatal mistake.

One common guideline for storing water is that one active person will generally need a gallon of water per day. Half of this will be consumed, while the other half is for personal hygiene.

This technically means you can store less and simply not be as hygienic, but that comes with its own problems for survival as well (namely, disease and other such things).

Here are some other questions:

  • Is anyone in your household sick or injured?
  • Is anyone in your household pregnant or nursing?
  • Do you have any children in your household?
  • Do you live in a very hot climate?

If you answered yes to any of these, you may have a greater demand for water (up to double or triple the normal amount).

We will continue with the assumption that one person needs one gallon per day, but keep in mind any extenuating circumstances you may have that may alter individual water needs. Here’s a table with some easy calculations for stockpiling:

Number of People in HouseholdLength of TimeWater Needed
13 months90 gallons
11 year365 gallons
23 months180 gallons
21 year730 gallons
43 months360 gallons
41 year1,460 gallons
43 years4,380 gallons

Again, this is accounting for consumption and personal hygiene only. This does not include pets, gardening, or any other use for water. Pets generally need a gallon of water every three days (depending on the size of the pet and type).

However, if you’re bugging in, we will simply assume that you are unable to tend to livestock or outside gardens. You will need some water for cooking, but this is dependent on what food you are cooking and how much of. If you are limited on fuel as well, you may not even be doing much cooking, so this number really depends on your situation.

Our advice? Stockpile what you know you’ll need based on our table above, then stockpile some more for cooking and other needs you may have.

Where Should You Store Your Water?

There are a number of containers available for storing water; however, some are more suitable for this purpose than others.

For example, you should generally not reuse milk jugs to store water, as it is nearly impossible to fully remove the milk proteins from the container, and these will eventually provide a habitat for bacteria to grow in. Other types of plastic may release toxic chemicals into your water.

So how do you know what’s safe? First, let’s talk about plastic containers. There are seven commonly used types of plastic:

  • Polyethylene terephthalate (PET/PETE/polyester)
  • High density polyethylene (HDPE)
  • Polyvinyl chloride (V/Vinyl/PVC)
  • Low density polyethylene (LDPE)
  • Polypropylene (PP)
  • Polystyrene (PS)
  • Other/Polycarbonate (PC)

The three types that are considered safe for common use around food and drink are: high density polyethylene (HDPE), low density polyethylene (LDPE), and polypropylene (PP). However, this is very dependent on the conditions that the containers are stored in.

For example, PET/PETE is commonly used in soda bottles and juice bottles, and if you’re not storing water for a very long time and the bottles are not stored in hot conditions, the likelihood that PET/PETE will leak chemicals into the water is low.

Even with plastic containers made from HDPE or LDPE, however, there is a chance that they can leak the chemical nonylphenol (short explanation: this is bad) into your water if they are stored in sunlight. Polypropylene (PP) is commonly used for hot food storage because it will not leak chemicals with the application of heat.

What it really comes down to is this, then: where can you store your water? Do you have a cool area available that doesn’t get any UV exposure?

Then you may be able to simply reuse 2-liter bottles from soda to build up your stockpile (given that you properly wash all the containers you use).

55-gallon water barrel

This might be a good option for urban dwellers who lack space to store enormous containers of water, but for anyone who owns a home or retreat (or both), it might be feasible to store your water in even larger containers.

For this purpose, there are containers sold specifically for water that come in sizes from 2.5-gallons to 500-whopping-gallons. Some great (BPA-free) options are below:

  • in a WaterBrick
  • in a 5 gallons jug
  • in a Water Barrel
  • in a Water Storage Tank

Many of these containers can also be bought at retailers, like Walmart, Target, your local sports store, and more.

There are plenty of options for whatever space you have to store your water in, and for how much water you want to store. Some containers are collapsible, while some are meant to be stacked.

The container you buy depends on your situation. For plastic, so long as you make sure to check what kind of plastic it is and how you store it, you should be good to go in an emergency. What if you want to store your water in containers made of some other material, however?


Glass is another option for storing water, but may be less convenient than plastic for a number of reasons. First, it is heavy and easily breakable. Like plastic, you will need to be sure it is food-grade glass and stored in a cool, dark area.

Some upsides: Glass is impermeable, so it can be stored near other supplies without the water being at risk, and it will be much harder for pests or rodents to get into. Over time, vapors from stored fuel or other chemicals can penetrate plastic; on top of that, plastic is easier for pests or rodents to get into. Not only that, but glass will be much harder for zombies to steal because of its weight (not that it would be easy to make off with a 260-gallon water tank in the first place!).


The best option for storing water in a metal container is by far and away stainless steel, but one major downside is that large stainless steel containers for water cost much more than plastic.

Some upsides are that, like glass, stainless steel is impermeable so vapors from nearby stored chemicals won’t eventually leak into the water. It’s also lighter than glass, so if you want to move your stores around, it will be easier.

Metal can also be stored somewhere that gets a lot of light, unlike glass and plastic. However, you should still check that your stainless steel is food-grade, and on top of that, you’ll probably want some sort of protective coating on the inside to prevent the chlorine from your tap water corroding the steel.

No matter what you decide to store your water in, do your research on the material and any precautions you need to take. You don’t want to end up in a disaster with contaminated water. In fact, because it can be so easily contaminated, most preppers filter their water in various ways to be sure it is still safe.

Watch these YouTube video reviews for more:

Water Barrel Sanitize and Set Up 55 Gallon Water Barrel
3 Tips for Berkey Water Filter Users or those considering buying a Berkey

How Do You Filter and Purify Your Water?

There are a variety of options for filtering and purifying your water, including:

  • Using a store-bought filtration and purification system. These come in all shapes and sizes; it’s best to choose the one that suits your situation best. Be sure to look for a system that both filters and purifies the water, as these are technically two different processes (one to remove dirt/sediment/etc. and one to remove viruses and bacteria).
  • Boiling the water to kill any viruses or bacteria that may be present. If you use this method, be sure to boil the water for at least three minutes to ensure that it is safe.
  • Using a chemical like bleach (about 8 drops to every gallon), iodine, or chlorine. You should take care with chemicals, as the material that you store your water in could react with them. You also will want to make sure that you don’t use too much, as this could be harmful when you drink the water as well.

Even if your water was clean when it went into storage, there’s no guarantee that it’s still safe after being stored.

Having a filtration and purification system in place ensures that your storage water remains safe for consumption. Some people even suggest rotating your water supply every 6 months to a year, but there’s very little evidence for its effectiveness.

Purifying - Boiling Your Drinking Water - The Outdoor Gear Review

Final Words

Many people recommend having more than one stockpile in more than one place if you want to be truly prepared. This is a great option for anyone who has a retreat or a lot of space, because it ensures that you have a location for bugging out when you need to.

This also means that if your stored water supply in one place happens to go bad for whatever reason, you’ll have somewhere else with water to run to. It’s always good to have a backup plan, even for your backup plan.

6 thoughts on “How to Stockpile Water for Emergencies”

  1. I store 310 gallons of my own well water mixed with purifier in a brand-new plastic tank designed to store industrial acid. I change it every three years. I also installed a “SimplePump” in my 220′ well, this is a hand pump that fits right alongside my submersible electric pump; the electric pump is at 200′ and the SimplePump is at 150′. Normal water level in the well is 40′ from the surface.
    The SimplePump pumps directly into my pressurized water tank in the house, and this allows me to flush toilets and use sinks upstairs. One hour of hand pumping delivers 30 gallons into the pressure tanks – enough for one day. My septic tank is gravity fed and pumped every year.
    I disguise the SimplePump by surrounding it in a little potting shed that is installed over the well head. The potting shed is very strongly built and has a hinged roof that folds back to allow me to pull and replace both the submersible electric pump and the SimplePump, when necessary. I hand pump at night so as to not alert the neighbors during a crisis. During Hurricane Sandy we were without electricity for nine days and nights; the SimplePump provided all our water needs.

  2. Our Berkey is clear so it’s pretty obvious when it needs water and how much.
    And for those stockpiling, order extra spigots.

  3. I have stored about 100 half gallon and gallon containers. Mostly bottled water and juice containers. They are clean, dry and stored in cardboard boxes. Should the need arise, a quick rinse, then fill. An advantage of this, some, but maybe not all, of the water can depart, if the need arises.

  4. In Australia outside of cities and towns every house hold has had large water tanks connected to thier roof gutters ,(eaves troughs) for at least the last century or more. I was born in 1944 and every house we ever lived in outside of town had at least one galvanized water tank. I am talking of tanks that hold thousands of gallons. I currently have two 5 thousand concrete tanks and a plastic tank that holds over 5 thousand gallons. It is usually dry during the winter here, on the tropic of Capricorn on the east coast of Aus., but we had a fairly dry summer just past so we are running out ofwater for the garden. We have had a bore (deep well) put down but are still waiting to get a solar powered pump for it. Then we will have all the water we need for the garden and orchard.

  5. I have a couple of UBC (Universal Bulk Containers) that will hold over 300 gallons each. They were used ones and were obtained from a Farm Supply relatively inexpensive. They would make good rain water catchments. They held fertilizers and had to be flushed out.. I got them for watering our garden, toilet flushing. and filtered for clothes,dish and hand washing, bathing. Potable drinking water is stored in those 5 gal water jugs as well as some 2 ltr soda water bottles.

  6. I live in Minnesota, it gets very cold here. I have water storage however if you lost utilities (heat) in the winter your six gallon plastic water containers would be big chunks of ice.

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