How to Store Emergency Water in an Apartment: A Practical Small-Space Guide

If you live in an apartment, storing emergency water sounds simple until you actually start doing it. Water is heavy, it takes up a lot of room, and you probably don't have a garage or basement where you can line up a bunch of large containers. If you're renting, installing some elaborate water-storage system probably isn't an option either.

That doesn't mean you can't build a decent emergency water supply. I started getting into preparedness around 2020, and water was one of the first things I worked on. More than six years later, I'm still working on it. I didn't go out one day and buy a huge emergency water setup. I've picked up another jug here and there, found places to put them, and figured out a rotation system that works for me.

That's really how I think apartment preparedness should work in general. Start with what you can realistically do and improve it over time.

How Much Emergency Water Should You Store?

A good starting point is at least one gallon of water per person per day for three days. The CDC recommends trying to build toward a two-week supply if possible. You may also need additional water for pets, hot weather, illness, or other individual needs.

For two people, the basic three-day recommendation works out to six gallons. A two-week supply would be 28 gallons, and that's before adding extra for pets. That's where apartment living starts making things interesting. Twenty-eight gallons of water weighs well over 200 pounds and takes up a considerable amount of space.

It's easy to tell someone to store two weeks of water. The harder question for an apartment dweller is: Where are you supposed to put it?

My answer has been to build my supply gradually and use several different kinds of containers rather than relying on one giant water-storage system.

My Everyday Drinking-Water Rotation

For drinking and cooking, I currently use four 3-gallon clear water jugs that I refill at a local water vending store. Because this is water we regularly use anyway, I don't really think of it as water that's just sitting around waiting for a disaster. It's part of our normal household water supply while also giving us some water on hand if something happens.

I numbered the containers 1 through 4 to help me rotate them. When I bring home freshly filled water, I put the newer container toward the back and pull the older water forward to use first. It's basically a simple first-in, first-out system.

It's nothing fancy, but that's the point. One problem with emergency supplies is that it's easy to buy something, shove it in the back of a closet, and forget about it. I prefer having at least part of my water supply incorporated into everyday life.

I Also Keep Dedicated Backup Water

In addition to the drinking water we regularly rotate, I've gradually collected some heavier-duty 6-gallon water containers. These are filled with tap water and stored specifically as backup emergency wa

I put the date on the containers so I don't have to remember when I filled them. The CDC recommends replacing water you've filled into storage containers every six months and recommends labeling containers with the storage date.

I'll be the first to admit that a six-month rotation schedule is another thing you have to remember. Writing the date directly on the container makes it much easier.

Again, I didn't buy all these containers at once. I've been doing this for years. If you currently have one water container, getting a second one is progress. Maybe you find room for another one later. Preparedness doesn't have to be one giant shopping trip.

Don't Forget Water That Doesn't Need to Be Drinking Water

I also keep another category of stored water that doesn't get talked about as much: utility water. I have regular jugs filled with water that could be used for things like hand washing, cleaning, or flushing a toilet.

If the water stopped running, I wouldn't want to use good drinking water every time I needed water for something that didn't require it. In an apartment where storage space is limited, separating drinking water from water intended for other purposes can help stretch the better water you have.

There is an important distinction here, though. I don't treat random reused containers as drinking-water storage. For water intended for drinking, the CDC recommends food-grade water-storage containers. Containers should close tightly and should never be containers that previously held toxic chemicals such as pesticides, bleach, or petroleum products.

So I basically think of my water in two categories: drinking and cooking water that gets more careful handling, and utility water that gives me additional options for things like cleaning and toilet flushing. Whatever system you use, clearly label your containers so utility water isn't accidentally treated as drinking water.

Water Gets Heavy Fast

This is especially important in an apartment because a gallon of water weighs about 8.3 pounds. A 3-gallon container is roughly 25 pounds, while a full 6-gallon container is around 50 pounds. Get up to 30 gallons and you're dealing with roughly 250 pounds of water.

That affects both where you store it and what size containers make sense. A giant container may look space-efficient, but that doesn't necessarily mean you'll be able to move it when it's full. That's one reason I like having water divided among multiple containers. Even my 6-gallon containers are pretty heavy when they're full.

If you're storing a substantial amount of water in one location, especially on an upper floor, it also makes sense to think about where all that weight is going rather than piling hundreds of pounds onto one small shelf or piece of furniture.

Where Can You Store Emergency Water in a Small Apartment?

This is probably the biggest challenge. Instead of looking for one place capable of holding your entire water supply, look for unused spaces throughout your apartment. The bottom of a closet, underneath sturdy furniture, the back of a pantry, or other out-of-the-way areas may be able to hold a container or two without turning your apartment into an emergency-supply warehouse.

I also don't think all of your water necessarily needs to be stored together. Depending on the emergency, having everything in one part of the apartment could actually make it harder to access. What's more important is knowing what you have and where you've put it.

There are also some places you should avoid. The CDC recommends keeping stored water in a cool location, away from direct sunlight and away from toxic substances such as gasoline and pesticides.

Use the Right Containers for Drinking Water

Not every plastic jug is automatically a good long-term drinking-water container. The CDC says unopened commercially bottled water is the safest and most reliable source of emergency water. If you're filling your own containers, it recommends food-grade water-storage containers when possible.

For refillable containers, I would look for something durable with a tight-fitting lid that's actually intended for storing drinking water. If you're unsure whether a container is food-grade or appropriate for water storage, check the manufacturer rather than assuming.

And never repurpose a container that previously held toxic chemicals for drinking water. Saving a few dollars on a container isn't worth potentially contaminating your emergency water.

Clean Your Water Containers Before Filling Them

Reusable drinking-water containers should start clean. The CDC recommends washing storage containers with soap and rinsing them completely before sanitizing them.

For sanitizing, the CDC currently recommends mixing 1 teaspoon of unscented household chlorine bleach containing 5%–9% sodium hypochlorite with 1 quart (4 cups) of water. The solution is used to coat the inside of the container before being poured out and the container allowed to air dry.

Because bleach products and official recommendations can change, I would check the CDC's current emergency water-storage instructions before doing this rather than relying on an old chart or social media post.

What About Water Filters and Purification Tablets?

I also keep water-filter straws and water-treatment tablets as additional backups, but I don't consider either of those a replacement for actually storing water. A filter isn't particularly useful if you can't find water to put through it in the first place.

It's also important to understand what your particular filter or treatment method can and cannot do. Not every filter removes every contaminant, and water contaminated with fuel or toxic chemicals can't necessarily be made safe with ordinary emergency treatment methods.

My preference is pretty simple: stored water first, treatment options as another layer of backup. If my apartment suddenly loses water for a day or two, I'd much rather reach for a container I already have than immediately have to figure out where I'm going to find and treat water.

Remember Water for Your Pets

Don't calculate your emergency water supply for the humans in your apartment and forget everyone else. I have cats, so they're part of my planning too.

Exactly how much an animal drinks varies by its size, diet, temperature, and other factors, but pets still need to be included when figuring out how much water your household needs. There can also be other uses for that water, such as washing their bowls.

This is another reason I don't like thinking of emergency water as one exact magic number. Your household might have two people and no pets, while someone else's apartment could have one person, two dogs, and three cats. Your actual needs matter.

Don't Let the "Ideal" Amount Stop You From Starting

This is probably the biggest lesson I've learned from storing water in an apartment. It's easy to calculate an ideal two-week emergency supply, look at how much space it takes up, and think, Where am I going to put all that?

If the recommended amount seems overwhelming, don't let that turn into storing nothing. Start with three days if you can. If even that isn't realistic right now, start with what you can manage and build from there. One extra gallon of safe drinking water is more useful during a water outage than zero gallons because you were waiting until you could build the perfect setup.

That's basically what I've done since around 2020. My water storage today doesn't look exactly like it did when I started, and I'm sure it won't look exactly the same a few years from now. I've added containers, changed how I organize them, started dating them, and developed a simple rotation system along the way.

A Simple Apartment Emergency Water Plan

If I were starting over in a small apartment, I wouldn't make it complicated. I'd first get enough safe drinking water to make a short disruption easier to deal with. Then I'd find a way to rotate at least some of that water through normal household use. From there, I'd gradually increase the reserve, add some separate utility water where space allowed, and keep a reliable water-treatment method as another backup.

You don't need a 55-gallon drum sitting in your living room to start preparing for a water outage. You need some safe water, stored properly, that you can actually access when you need it.

Then you can build from there.

Prep where you live.