5 Water Storage Tanks for Home Emergency Water in 2026

Water storage tanks pick up where jugs and barrels leave off. A tank holds more water in one place, often with a spigot or drain, and can take rain water or well water as well as tap water. The key choice is whether you will drink from it. That decides what tank you need.

#1. WaterPrepared 55-Gallon Stackable Tank: best starter tank for drinking water

WaterPrepared 55-Gallon Stackable Tank

Our verdict:

Best starter tank for drinking water

Best for a first step up from 5-gallon jugs.

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• HDPE with a UV-resistant blend
• Built-in spigot that takes a garden hose
• Stackable shape, about 22 x 23 x 30 inches

Keep in mind: once full it stays put.

Product details checked September 2026

#2. US Water Systems 35-Gallon Tank: best compact tank with a locking lid

US Water Systems 35-Gallon Tank

Our verdict:

Best compact tank with a locking lid

Best for closets, sheds and small garages.

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• Heavy-duty polyethylene, 18 inches wide by 32 inches tall
• 110 mm wide opening
• Child-resistant locking lid

Keep in mind: 35 gallons covers a small household for a short time.

Product details checked September 2026

#3. RomoTech 50-Gallon Square Tank: best low, square tank

RomoTech 50-Gallon Square Tank

Our verdict:

Best low, square tank

Best for trailers, truck beds and low spaces.

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• UV-stabilized polyethylene with molded gallon marks
• 5-inch fill opening and 3/4-inch drain fitting
• Tie-down channels for a truck bed or trailer

Keep in mind: the listing aims at farm and utility use. Confirm it suits drinking water before you store water to drink in it.

Product details checked September 2026

#4. RomoTech 550-Gallon Tank with Legs: best mid-size horizontal tank

RomoTech 550-Gallon Tank with Legs

Our verdict:

Best mid-size horizontal tank

Best for farms and large rain or well setups.

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• UV-stabilized, BPA-free polyethylene
• Molded gallon and liter marks
• 5.5-inch fill cap and 2-inch side outlet

Keep in mind: 550 gallons weighs over two tons when full. It needs a solid, level base.

Product details checked September 2026

#5. Elkhart Plastics 1000-Gallon Tank: best large drinking water tank

Elkhart Plastics 1000-Gallon Vertical Tank

Our verdict:

Best large drinking water tank

Best for off-grid homes and rain collection.

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• Virgin polyethylene, FDA and NSF/ANSI 61 compliant per the maker
• Dark UV-resistant body that blocks light
• Two 16-inch manway lids, bottom drain fittings and gallon marks

Keep in mind: it needs a prepared pad and plumbing.

Product details checked September 2026

See the 1000 gallon tank guide.

Factors to consider when choosing a water storage tank

• Drinking or not. For drinking water, look for food-grade or NSF/ANSI 61 listings. Utility tanks may be fine for gardens and cleaning only.
• Light. Dark or opaque tanks block light, which slows algae growth.
• Fittings. A spigot or drain near the base, and a wide lid for cleaning.
• Weight. Water weighs about 8.3 pounds per gallon. A 500-gallon tank weighs over two tons when full.
• Shape. Vertical tanks save floor space. See the vertical water storage tank guide. Low horizontal tanks suit trailers and tight heights.

How we picked these water storage tanks

We checked each tank's listing for material, fittings and whether it is meant for drinking water. We followed the container rules on Ready.gov's water page and in the CDC's water storage guide. We did not test these by hand. Details come from each listing, so check the current page before you buy.

Setting up a water storage tank

Put the tank on a flat, level, solid base that can hold its full weight. Keep drinking water tanks out of direct sun when you can. Clean and sanitize before first use, following Ready.gov's bleach steps. Label the fill date and replace or treat water on a schedule. For rain collection, remember the EPA's point that roof water can carry bacteria and chemicals, so treat it as non-drinking water unless you filter and disinfect it.

For smaller options, see the water storage containers guide. For the full water plan, see the rain water barrel hub.

Questions people also ask

Are plastic water storage tanks safe for drinking water?

Only if the tank is made for it. Look for food-grade or NSF/ANSI 61 listed tanks. Many farm and utility tanks are for non-drinking use only.

How often should water in a storage tank be changed?

Ready.gov and the CDC say to replace water you store yourself every six months. Large tanks that you draw from and refill often need a cleaning routine too.

What size water storage tank do I need?

Start from one gallon per person per day. Two weeks for four people is 56 gallons. Larger tanks suit rain collection, gardens, livestock or longer outages.