How Much Water To Store?

[Lightspeed]

I don't get your logic in this MB.

After air, water is the most critical commodity.

Without water people start to die in 3 days to a week

Without food people start to die between 1 month and 6 weeks

Its logic to prepare to store enough water to stay alive for as long as our food stores plus 6 weeks.

This is especially true if the survival strategy is to bug in and lie low for three months, until the dust settles.

For, say 4 adults bugged in with a 3 month food stockpile, consuming 2l each per day, that's a storage requirement of 1080 Litres, just for drinking water.

The OP contends that the storage requirement should be 1 Gallon per person per day. That brings us to major logistical issues as the requirement for our 4 people above is then 4680 Litres (4.6 metric Tons in weight, so not something that can be stashed in the attic!)