1 Calculate a starting amount
CDC recommends planning approximately 3.8 litres per person per day for at least three days. This is a starting point for drinking and basic needs, adjusted for circumstances.
2 Add the menu’s requirements
List the water needed by meals and cleaning. Include pets and special needs. When water is limited, switch to no-cook food rather than using an unverified source.
3 Store clearly separated supplies
Use factory-sealed water or suitable food-grade containers. Label dates and purpose. Drinking water must not be confused with utility water; boiling does not remove chemical contamination.
Practical checklist
- Water calculated by people and days.
- Food preparation included.
- Drinking containers separated.
- Official water notices checked.
Frequently asked questions
Does this cover every need?
It is a starting estimate. Heat, illness, children and particular meals can require more.
Can any water be made safe by boiling?
No. Boiling does not make chemically contaminated water safe.
Source and scope
CDCFollow the product label and local health guidance. Individual feeding and medical needs require professional advice.
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