Or do what my MIL does at all times in case of power failure in her house, she keeps jugs of water all the time with small portions of bleach in it. It will keep for a long time that way. She has some everywhere in the basement, kitchen, bathroom. Usually in an empty bleach bottle. It's just something that she's always done. Probably not a bad practice to have one in the house in case of power outtage if nothing else.
I'm not too worried about stock piling of goods as I do that anyway. I just don't have the water stockpiled or even the plastic that they mentioned you should have. It's just a warning that they are giving you since they got caught off guard with 9-11 they (the government) is trying hard to keep everyone warned (not scared) about what's going on and what should be done to be prepared.
Just my .02 cents.
Chris68
Peer Moderator 
