Emergency Water Storage Guide
You can survive weeks without food. You can't survive 3 days without water. Of all the things you can do to prepare, water storage has the highest impact-to-effort ratio.
How Much Water Do You Need?
1 gallon per person per day
Drinking (½ gallon) + sanitation (½ gallon)
| Household Size | 3-Day Min | 7-Day Goal | 14-Day Ideal |
|---|---|---|---|
| 1 person | 3 gal | 7 gal | 14 gal |
| 2 people | 6 gal | 14 gal | 28 gal |
| 4 people | 12 gal | 28 gal | 56 gal |
| + pets | Add ½ gal/day per large pet |
Increase by 50% in hot climates, for nursing mothers, or for illness.
Storage Methods by Living Situation
🏢 Apartment / Small Space
- • Stackable 5-gallon jugs — fit in closets, under beds, behind furniture
- • Commercially bottled water — cases stacked in closets, 1-2 year shelf life
- • WaterBOB ($35) — fills your bathtub with 100 gallons when you get a warning
- • Total space needed: about 2 cubic feet per person per week
🏠 House with Garage/Basement
- • 55-gallon drums — food-grade, BPA-free. One drum serves a family of 4 for 2 weeks of drinking water
- • Stackable 7-gallon containers — more manageable weight (58 lbs vs 458 lbs)
- • Keep off concrete floors — use a pallet or boards to prevent chemical leaching
- • Away from sunlight — cool, dark storage extends life indefinitely
Water Purification Backup
Storage is primary. Purification is backup. Both matter.
Boiling
Benefit: Free, kills all pathogens
Limitation: Requires fuel/heat source
Best for: Short-term, small quantities
Gravity Filter (e.g., Berkey)
Benefit: No power needed, filters thousands of gallons
Limitation: $60-300 upfront
Best for: Long-term, families
Purification Tablets
Benefit: Lightweight, cheap ($8-15)
Limitation: Chemical taste, 30-min wait
Best for: Go-bags, backup
Straw/Squeeze Filters
Benefit: Portable, $20-35
Limitation: One-person use, limited volume
Best for: Individual/hiking
Rotation Schedule
6 mo Commercially bottled water — replace or use in cooking
1 yr Self-stored tap water in food-grade containers — drain, clean, refill
5 yr Commercially sealed water in opaque containers — inspect for algae/taste
∞ Properly stored water in sealed, food-grade containers away from light — technically indefinite
Related Pages
Water is boring until you don't have it.
Then it's the only thing that matters.
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