I'm sure this has been brought up before.
I was trying to figure the storage requirements in terms the actual "footprint" for water. Based on the readings and so forth it looks like a cubic foot of storage space per person per day is required.
Here's why (wisdom to follow): The recommendations vary from 3-10 gallons per day for a person for all uses of the water. A cubic foot of water equals about 7.5 gallons. Given that you will lose some "capacity" due to inefficiences in packaging and the actual structure to store the water that leaves around 5-6 gallons. That is unless you are using a bulk system. In which case pitch the whole thing.
If you want to figure storage requirements for any given amount of water take the amount of gallons desired and multiply by .1337. That is basically the reciprocal of 7.481 (actual gallons per cubic foot) The numbers came from some Coast Guard Haz Mat site.
Anyway, I was just playing around. It is boring at the store today.
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"Its not a matter of being ready as it is being prepared" -- B. E. J. Taylor