Hi. I just found a place to buy those big blue plastic water barrels for a good price... my question is.... if I fill them up w/ drinking/cooking water... will it be ok stored for long periods of time? Or will it "go bad" and need to be treated or boiled before drinking? What about water in store bought gal jugs? ok after a long time? This last storm got us thinking.. we would be just fine for a long period w/ no elec.. except for water needs. I also plan to use some for rain water collection for plants livestock washing etc.... But I just need your thoughts on the drinking water aspect of storage. Thanks in advance!