For the Kitchen , washing vegetables and Drinking, Reverse Osmosis, with UV Light , kills 99.99 % of everything .. Once you have one you will never depend on anyone else for clean water again, and you have the Peace of mind of knowing what you are drinking.
Because do you really know what is in that bottled water you buy, to begin with .
I'm sure there is a lot of shenanigans going on , a lot worse than your 5 Gal Bottle being in the sun for a couple days .
Someone mentioned in a Previous thread , that they are 100 % sure that those big Bottles never get rotated
There is no such thing as F I F O , inventory . They just dont care.