Apartment preparedness
Water storage in a small apartment.
The heaviest, bulkiest, most important thing you will store. One gallon weighs 8.3 pounds. Here is how to make the math work in 600 square feet.
See the containersThe problem
Water is the hardest thing to store in an apartment.
Every other supply is light, compact, or both. A flashlight fits in a drawer. Three days of food fits in a shoebox. A first aid kit fits on a shelf. Water does not cooperate. It is heavy, it is bulky, it leaks if you store it wrong, and it goes stale if you forget about it.
In a house with a basement, none of this matters. You stack a few 5-gallon jugs in the corner and forget about them for a year. In an apartment, every gallon competes with your belongings for floor space, and every container has to clear the questions that houses never ask: Can the floor hold it? Will it leak onto the neighbor below me? Can I actually lift it?
This page answers those questions. It is specific to apartment water storage. For the broader storage plan covering all five supply categories, see the small-space storage guide.
The math
How much water do you actually need?
One gallon per person per day is the FEMA and CDC baseline. That covers drinking and minimal hygiene. The realistic number is closer to 1.5 gallons per person per day when you include cooking, handwashing, and basic cleanup.
72 hours · 1 person
3 gal
25 lbs · fits in a closet corner
72 hours · 2 people
6 gal
50 lbs · two jugs under the bed
2 weeks · 2 people
28 gal
233 lbs · distributed across 3-4 zones
The 72-hour number is manageable in any apartment. Two containers under the bed and you are done. The two-week number is where the real planning starts. You will not store 28 gallons in one spot. You will distribute it: under the bed, on a closet floor, beside the refrigerator, and in a bathtub bladder held in reserve. The rest of this page shows you how.
Containers
Which containers fit an apartment?
Not every water container works in a small space. The right one depends on how much you need, where you are putting it, and whether you can lift it when it is full.
1-gallon jugs
Easiest to handleStore-bought bottled water in gallon jugs. The simplest option. Easy to carry, easy to rotate, easy to distribute around the apartment. Takes more linear shelf space than larger containers because jugs do not stack neatly. Best for people who cannot lift heavier containers or want the easiest rotation.
3.5-gallon WaterBrick
Best for stackingFlat, rectangular, BPA-free bricks that interlock when stacked. They slide under beds, fit inside closets, and stack in corners. The modular shape uses space more efficiently than round containers. The 29 lb weight is manageable for most adults. Start with two bricks (7 gallons) and add more as budget allows.
5-gallon round jug
Common but awkwardThe office water cooler shape. Inexpensive and widely available. The round profile wastes space in square cabinets and rectangular under-bed zones. Hard to pour without a spigot. At 42 lbs full, it is at the lifting limit for many people. Fine on a closet floor. Awkward everywhere else.
7-gallon Aqua-Tainer
Best under-bed optionThe Reliance Aqua-Tainer is the apartment workhorse. Flat-sided, fits under most bed frames, has a built-in spigot so you never lift it to pour. Two of them hold 14 gallons, which covers two people for 72 hours with a gallon to spare. Fill it in place using a pitcher if you cannot carry 58 lbs.
WaterBOB bathtub bladder
Best surge reserveA food-grade bladder that fills your bathtub from the faucet. Takes zero space until you need it. Fill it when a storm warning, boil-water advisory, or building maintenance notice arrives. This single item extends a two-person household from three days to three weeks. Keep one in a drawer and forget about it until you need it.
Cases of bottled water
Convenient but bulkyThe grab-and-go option. A flat case slides under a bed, behind a couch, or beside the fridge. Individual bottles are easy to carry, easy to hand out, and easy to rotate into daily use. The downside: more plastic waste, lower volume per cubic foot than dedicated containers, and the packaging degrades faster in heat.
Placement
Where to put it. Where not to.
Water needs a cool, dark, stable-temperature location on a hard surface. That narrows the options in an apartment, but not as much as you think. You are distributing 3 to 5 containers across multiple zones, not finding one spot for all of them.
Under the bed
Dark, cool, stable temperature, out of the way. The single best water storage location in most apartments. Two Aqua-Tainers or four WaterBricks fit here. Place a waterproof tray or plastic sheet underneath.
Coat closet floor
Push coats forward, put a 5-gallon jug or a pair of WaterBricks behind them on the floor. Dark and undisturbed. The floor surface is usually hard (tile or wood at the threshold).
Beside the refrigerator
That 4-6 inch gap between the fridge and the wall fits a flat case of bottled water standing on edge. Kitchen floor is hard. You walk past it every day, so you remember it exists.
Inside a storage ottoman or bench
Furniture with interior storage can hold a few gallon jugs or WaterBricks. The water is hidden, the space is dual-purpose, and no floor plan is consumed.
Avoid these locations
Balcony. Temperature swings accelerate plastic degradation and promote algae growth. Freezing temperatures can crack containers. Direct sunlight is the worst enemy of stored water.
Near windows. UV exposure degrades both the container and the water. Even indirect light raises the temperature enough to encourage bacterial growth over months.
On carpet without a tray. A slow leak under a container on carpet in a rental unit is a security deposit problem and a potential liability for damage to the unit below you.
Near cleaning chemicals. Fumes from bleach, ammonia, and solvents can permeate some plastics over time. Store water at least 3 feet from any chemical storage.
In an uninsulated storage unit. If the temperature drops below freezing, the water expands and cracks the container. If it reaches 100+°F in summer, the plastic leaches and the water tastes like a pool toy.
Weight and safety
Will the floor hold it?
Standard residential floors in the United States are rated for 40 pounds per square foot of live load. That is the building code minimum. Most apartments exceed it.
Two 7-gallon Aqua-Tainers under a bed weigh 116 pounds combined and sit on roughly 4 square feet of floor. That is about 29 psf. A full bookshelf weighs more. A bathtub full of water for a bath weighs over 500 pounds. Your floor can handle your water storage.
The concern is not structural failure. It is concentrated weight on a single point, water damage from leaks, and stacking containers beyond their rating.
Distribute, do not concentrate
Spread your water across 3-4 zones in the apartment rather than stacking it all in one closet. This keeps the per-square-foot load low and gives you access from multiple rooms during an emergency. Two containers under the bed, one on a closet floor, one beside the fridge, and a WaterBOB in a drawer is better than five jugs stacked in a pantry.
Always use a leak tray
A plastic boot tray, a baking sheet, or a purpose-made plant saucer under each container costs $3-$10 and catches slow leaks before they reach the floor. Check caps and seals whenever you rotate water. In a second-floor apartment, a leak is not just your problem. It is your neighbor's ceiling.
Respect stacking limits
WaterBricks are rated for stacking and interlock by design. Most round 5-gallon jugs are not. An unstacked jug that falls from a shelf releases 42 pounds of water onto your floor at once. Only stack containers the manufacturer explicitly rates for it. When in doubt, keep it on the floor.
Accessibility
What if you cannot lift 40 pounds?
A full 7-gallon container weighs 58 pounds. A 5-gallon jug weighs 42. These numbers matter because a lot of people cannot safely lift them. Seniors, people with back or joint injuries, people recovering from surgery, and anyone living alone who cannot risk a strain.
The answer is not storing less water. It is storing the same water in smaller units.
Use smaller containers
Four 1-gallon jugs (8 lbs each) hold the same volume as a single large container and can be carried one at a time. Six gallon jugs cover 72 hours for two people and no single trip to the faucet weighs more than a gallon of milk. WaterBricks at 3.5 gallons (29 lbs) are a manageable middle ground for most adults.
Fill in place
Slide the empty container into position first, then fill it using a pitcher or a food-safe hose. A 7-gallon Aqua-Tainer weighs 2 lbs empty. Slide it under the bed, then fill it one pitcher at a time. You never carry 58 lbs anywhere. When you need to drain and refill, siphon or use the spigot to empty it into a bucket, then refill in place.
Choose spigots over pouring
A container with a spigot means you fill a glass at the tap without lifting the container. The Aqua-Tainer's built-in spigot and the WaterBrick's optional spigot attachment turn heavy containers into stationary dispensers. A spigot is not a convenience feature. It is an accessibility feature that determines whether you can actually use the water you stored.
Ask for help with setup
If a neighbor, friend, or family member visits once every six months, ask them to help with the rotation. They carry the full containers to the tub for draining and back to position for refilling. The rest of the time, you use the spigot. Setup is a twice-a-year event, not a daily task.
The apartment-specific risk
When the building loses water.
In a house, a water outage is usually your problem to solve: a broken well pump, a frozen pipe, a shutoff for repairs. In an apartment building, a single main break, a pump failure, or a municipal boil-water advisory affects every unit at the same time. You share the infrastructure, so you share the failure.
You cannot dig a well. You cannot run a hose to a neighbor's house. You cannot drive to a spring with jugs. Your stored water is your only supply until service returns or you leave the building.
Know your building's water system
Ask your property manager: Does the building have a backup pump? How long did the last water interruption last? Is there a rooftop tank or a ground-level reservoir? Buildings with rooftop gravity tanks may maintain pressure for hours after a pump failure. Buildings on direct municipal pressure lose water immediately when the main breaks. That history tells you how deep your storage needs to be.
The WaterBOB strategy
A WaterBOB ($30-$40) folds flat and lives in a drawer until you need it. When you hear a storm warning, a scheduled maintenance shutoff, or a boil-water advisory, fill it from the tub faucet. It takes about 20 minutes to fill and holds up to 100 gallons. That single step extends a two-person household from three days to three weeks. You trade your bathtub for the duration, but you gain weeks of water security.
Boil-water advisories in apartments
A boil-water advisory means the water coming from your tap may be contaminated. If you have power, boiling for one full minute makes it safe. If you are in a power outage at the same time, your stored water is the only safe supply. This combination (water advisory plus power outage) is common during storms and floods. Your stored supply covers exactly this scenario.
The elevator problem
If the building loses power and water simultaneously, the elevator stops working. Carrying water up stairs from a distribution point is physically exhausting above the third floor. Every gallon you already have stored in your unit is a gallon you do not carry up a stairwell. For residents on upper floors, stored water is not just convenience. It is the difference between staying and having to leave.
Keeping it fresh
Water rotation in an apartment.
Stored water does not go bad in a way that will hurt you. Properly sealed tap water treated with municipal chlorine remains safe for 6 to 12 months. But it can develop a flat, stale taste and, in warm conditions, encourage algae or bacterial growth in containers that were not perfectly clean when filled.
Rotation keeps your supply fresh and gives you a reason to inspect your containers twice a year.
The schedule
Tap water in refillable containers. Drain using the spigot or a siphon. Use the old water for plants, mopping, or the toilet tank. Refill with fresh tap water. Mark the new fill date on the container with a permanent marker.
Commercially bottled water, sealed. Rotate by drinking it and buying a fresh case. Check the best-by date printed on the packaging. Bottles stored in heat or light degrade faster.
Inspect caps, seals, and trays. Check for slow leaks, cloudy water, or algae growth. Inspect the leak tray underneath. A cap that is not fully sealed can drip for months before you notice.
Set a phone reminder for the rotation date. Tie it to an event you already remember, like the daylight saving time change or a lease renewal date.
This weekend
Start with 72 hours of water.
You do not need 28 gallons on day one. You need 6. Two containers, one trip to a hardware store or an online order, and 15 minutes to slide them under the bed. That covers two people for three days.
Once that baseline is in place, add depth at whatever pace your budget allows. A case of bottled water beside the fridge. A WaterBOB in a drawer for surge capacity. A second pair of WaterBricks in the closet. Over a few months, you build from 72 hours to two weeks without any single purchase costing more than $40.
Starter plan: under $40
Buy two Reliance Aqua-Tainers ($13-$18 each) or four WaterBricks ($18-$22 each for a higher budget with better stacking).
Buy a plastic boot tray or baking sheet for under the containers ($3-$10).
Fill them from the tap. Mark today's date on each container with a permanent marker.
Slide them under the bed on top of the tray.
Set a phone reminder for 6 months from now: "Rotate water."
You now have 72 hours of water for two people, stored in space you were not using, for less than the cost of dinner out.