JadeJ, there are a couple of variables in your question. One: is the water coming from your faucet city water or well water? Urban water has all the chemicals needed to store without additional care. Well water….tho pure/clean/good tasting/etc 😉 …..might have something in it that could produce algae growth or some such. So I think storing water from municipal sources should be fine. From wells….mine gets ‘off’ after months.
Two: On the topic of canning water…seriously, it would be a good idea to actually store some sterilized water in canning jars….for First Aid purposes. I believe that’s one step further than municipal water source quality. ??? I have had some quarts stored for years. I assume since they were actually pressure canned, that they will continue to be sterile….if I remember to wash the dust off the lid before opening.
OldMtWoman ….my 2 cents