welcome... as LED commented, I change out once a year also...hurricane season is my primary concern, so change out the dedicated blue containers with spigots at the beginning of the season... I do add a couple of drops of clorox per gallon...

I keep 4 gallons frozen in the bottom of my small chest freezer...

I use up the water in the car shooting matches, and rotate when I get down to a dozen bottles...

my non potable supply is a couple of 42gal trash cans I fill with an approaching storm, and store in the shower so I still have access to a drain...

a short piece of garden hose was cut to give me access to the hot water heater, which I flush at the beginning of hurricane season also...

I keep a gallon of clorox and tincture of iodine around just in case... purchased a Sawyer .1 micron filter for 5 gal bucket this year, but haven't needed it yet...

access to neighbor's shallow water well, which can pump off my generator...