You will need enough water to last for seven days. You may need to store more if you have unwell people or small children in your family.
Don't forget your pets! You should bear in mind that the average person uses 1,540 litres during a typical week.
Recommended amount of stored emergency water – 140 litres per person per week (20 litres per person per day).
This recommended amount should be enough for drinking, food preparation, hand washing and other basic hygiene (brushing teeth and a sponge bath).
Minimum amount of stored emergency water – 21 litres per person per week (3 litres per person per day)
The minimum amount is only enough for drinking, cooking and very basic hygiene.