The government document mentions 72 hours and 30 days in the same breath, but the first is the bag you carry out and the second is the stockpile you keep at home. Mixed together, it's hard to know what to buy first, so here we keep them apart.
There are 17 items in all: 9 to carry out, 3 to keep at home, and 5 for CBRN preparedness.
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72-hour bag, what you take with you
This is what you carry out when you have to leave home for a shelter. The government document calls this the bundle that "holds you through 72 hours," long enough, it assumes, for rescue to reach you or for you to get clear of danger.
30-day stockpile, what stays at home
This is what you stockpile for staying home. The document says to keep enough food and water for one person to last 30 days. It is not meant for a bag, and belongs in a closet or storage room instead.
CBRN kit, kept separate
This kit is different because it is for chemical, biological, and radiological (CBRN) situations. The document keeps it separate and lists substitutes for each item.
Where this list comes from
Carried over as-is from Ministry of the Interior and Safety, "Guidelines for Public Action in Emergencies," pp. 40-43 (checked 2026-08-30). The items and amounts are the original text; the only thing we add is why each one is on the list.
The same document says not to stock up all at once. Adding one thing at a time when you shop works better than buying everything in one go, and picking items with expiry dates that you already eat or use keeps them cycling through naturally.
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Source: Ministry of the Interior and Safety, "Guidelines for Public Action in Emergencies," pp. 40-43 (checked 2026-08-30). This page organizes a government document and is not legal advice.