Water "per person", and purification

[upgrayedd]

I've heard MANY different equations about the recommende amount of water per person in a "survival" situation, most being around 1 gal. per person per day...is this accurate?
It DOES seem like alot-worst case scenario-is this enough?


Although we have PLENTY of food cached, Water is something that humans simply cannot go without for more than 3 days...

What is the proper amount of chlorine bleach per gallon that can SAFELY be used to purify water for human consumption? I hear that 60 PPM is lethal, is this accurate? I also was told that for drinking water, you want to aim for about 3-10 PPm??? Comments??Measurements???

Does bleach go bad?

Iodine?