Every daylight savings time, I rotate my stored water. I empty out my containers, refilling them with, then add 7 drops of bleach per gallon.
* Edit * I've been asked before what the best survival book is. Honestly, it is One Second After by William R. Forstchen. It's probably the best description scenario that could occur.
It is not those regurgitated line drawings that everyone copies from Euell Gibbons, or rehashed rule of 3's survival books.