If you are going to store water for years like that, be sure to also have plenty of fuel stockpiled so you can boil your water to try to make it safer to drink. Otherwise, you'll also need a stockpile of iodine tablets, or in a pinch, you could use bleach (but NOT recommended.) Or, you could make your own grog out of spirits diluted with water as the alcohol will kill off the bugs....
If you go with grog, you can store in wooden barrels or stainless steel drums if you would like ...
I live by a lot of freshwater lakes, and have a decent stockpile of burnable fuels, and while there is a potential fault line near by, the "biggest" quake in the area was a 5.4 magnitude in 1968, and it was like 150-200 miles south of me. (new madrid fault)
Anyhow, I have about 30-50 liters worth of mead and beer in my house on any given day (I do a small amount of infrequent home brewing.) It may not be the best at hydrating, however, it's got calories, and it will hydrate, and won't spoil very quickly (most of my stuff is IPAs or imperial stouts, and the meads are pretty much all 10-20% abv .... So, provided the corks/seals stay good, they should all remain drinkable/safe for years to come ...)