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Water: the one category you can't skip

A person can go three days without water. If the tap stops running after a storm, a main break, or a boil order, that window shrinks fast. The good news: an adequate water supply for a family of four takes about 15 minutes to set up and costs under $80.

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The numbers every family should know

  • 1 gallon per person, per day covers drinking, cooking, and basic hygiene.
  • 3-day minimum for a short-term emergency (storms, outages).
  • 14-day target if you live in a hurricane, earthquake, or ice-storm region.
  • For a family of four: 12 gallons for 72 hours, 56 gallons for two weeks.

Our top picks — stored water

Stackable 7-gallon water container.
Best overall

Aqua-Tainer 7-Gallon Water Container

The sweet spot for most families — stackable, vented spigot, fits under most kitchen sinks.

Pros

  • Stackable when full
  • Vent cap prevents vacuum lock
  • Easy to carry at ~58 lb full

Cons

  • Spigot can drip if overtightened
  • Not rigid enough to pressure-stack high
Check price on Amazon
Collapsible 5-gallon water carrier.
Best for renters

Collapsible 5-Gallon Water Carrier (BPA-free)

Stores flat when empty. Perfect for apartments where shelf space is the real constraint.

Pros

  • Folds to ~1 inch thick when empty
  • Cheap enough to keep several
  • Fits in a closet or under a bed

Cons

  • Not meant for long-term storage (rotate every 6 months)
  • Spigot is plastic — treat gently
Check price on Amazon
55-gallon water storage barrel.
Best for homeowners

55-Gallon Food-Grade Water Storage Barrel

One barrel = 12+ days for a family of four. Garage or basement only — full weight is about 440 lb.

Pros

  • One-and-done for 2 weeks of water
  • Thick, opaque plastic — safe for long-term storage
  • Pays for itself vs. bottled water in under a year

Cons

  • Needs a pump accessory (buy together)
  • Can't be moved once filled
Check price on Amazon

When to step up to filtration

Storage covers short emergencies. But if the city issues a boil-water notice that stretches past a week — or your well loses power — a filter becomes the smarter buy. Two tools cover 95% of household needs:

  • Gravity filter (like a Big Berkey or Alexapure): parks on a kitchen counter, processes 2–4 gallons per hour, lasts for years.
  • Personal straw filter (Sawyer or LifeStraw): pocketable backup for every go-bag and car.

Rotation tip

Label each container with the fill date. Rotate stored water every 6 months — dump onto plants, refill, re-label. It's a 5-minute job twice a year and it's the difference between water you'd actually drink and water that's been sitting for eight years.

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