No. I'm on a well so storage is directly in my feed line. It's constantly refreshed. If worse comes to worse, I have a deep well piston that I can hand pump with, too. If it gets worse than worse, I have a life filter good for about 3 years for a family of four and a beaver pond out back.
They say you should have 1 gallon per person per day. If you have a 55 gallon drum, and it's clean, you put can tap water in it with no treatment. You should just rotate it every so often. To purify water, they suggest 1/4 teaspoon of bleach per gallon, then let it sit before drinking it. To pre-treat water so you don't have to rotate as often, they say 1/8 teaspoon per gallon. Treating with bleach typically means your water will smell and taste like bleach. I suppose that's better than smelling and tasting like death.
Personally, if I wanted to store 55 gallons of water all the time "just in case" I'd probably not treat it, sterilize the storage, then rotate it more often. You can always boil before use if needed. If you're paying for city water/sewage, that will be extra. You could always fill it to get through this crisis, then look for inline storage after.
I chose my home to avoid all that, though.