I've been collecting ideas on water storage from the internet, but I'm still confused. It seems like 2-liter soda bottles are one of the most durable methods, and from what I understand, that type of plastic is very safe. So, my first question is mostly about treating the water. The Red Cross website says that as long as you rotate the water every 6 months, you don't have to pre-treat the water with bleach (unless your water comes from a questionable water source). That is, here in Palo Alto, we could just store the water right from the tap, but rotate every 6 months. Other websites give various amounts of bleach for treating the water before you store it. Some say 8 drops per 2 liters, others 4, other say to do it until the water smells like chlorine.
Any opinions on this? Also, How much do most people store? 50 soda bottles would yield about a 1 week supply using the 1 gal/person formula (I have a 4 person family). 50 is do-able, but I don't think I could logistically store and rotate 100 bottles. Of course if we have no water for more than 1 week, I would probably be wishing I figured something out sooner.
Since I have to buy all those bottles of soda, could I initially buy something like club soda and use that as my drinking water supply until it expires? I know club soda has a little sodium in it, but is there any reason why it could just be used for emergencies?