Lots of way to save water. Not to many ways to cheaply keep it sanitary, don't forget to keep that in mind
while saving to use it, run it through a filtration process of some sort, don't just assume its clean enough to drink
if it's been stored a long time !
As long as there are no chemical contaminants all you have to do is boil it.
Lots of springs in the bush here,but still need to boil it to be 100% sure,especially during the spring freshet.
That said,I have drank plenty of springwater from the ground with no ill effects.
One spring source where we got nice cold water to drink on the railroad,we had tested every month for e-coli etc.Only during the spring freshet was there trace amounts of e-coli.