Per person, per day1 gallon
3-day min, family of 412 gallons
21-day target, family of 484 gallons
Full bathtub yields40–60 gallons
A full bathtub, filled early, covers flushing and hygiene — not drinking.
Storage checklist
- Store in food-grade, sealed containers
- Keep containers away from direct sunlight and chemicals
- Label each container with the fill date
- Have a backup purification method — tablets, filter, or knowing how to boil
