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How much water to store for an emergency in the UK
Quick answer: A straightforward planning figure is 3 litres of drinking water per person per day. For three days, that is 9 litres per person, before any extra allowance for cooking or hygiene.
What to do now
- Check the current official advice for your area and situation.
- Write down the household details or supplies that would help you act calmly.
- Choose one small action today and review the plan when circumstances change.
Practical details
The UK Government checklist gives 3 litres per person per day for drinking. The British Red Cross describes 2.5–3 litres. Use the calculator to total the drinking-water figure for your household; infants, medical needs, climate and pets can change what is appropriate. Ask a vet about animal needs.
Keep the plan straightforward and make sure everyone at home knows where the relevant supplies and contact information are. If circumstances change, update it rather than relying on an old printed list.
Make it fit your household
Consider children, pets, mobility, medicines, dietary needs and whether anyone relies on mains-powered equipment. For health questions, speak to a pharmacist, GP, NHS 111, equipment supplier or clinical team as appropriate. For urgent danger call 999.
Local arrangements differ across the UK. Use the official links below for current information rather than assuming one service covers every nation.
Common questions
What should I do first?
Check the official advice for your area, then take the first practical step listed above.
Does this advice apply everywhere in the UK?
Some services differ by nation. Check the relevant official service for your location.
How often should I review this?
Review it every six months and after a change in household needs, equipment or contact details.
Where can I get extra help?
For health advice use NHS 111, speak to your GP or pharmacist, and contact your equipment supplier or clinical team. Call 999 for an emergency.
Sources
- Official guidance (checked 30 October 2026).
- NHS 111 and urgent care (checked 30 October 2026).
Reviewed by the PrepperReady team, 30 October 2026.
Related: Explore the water hub, build a household kit, and browse planning tools.
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