Or stockpile potable water. 80-100 gallons, mileage may vary. This will buy you time to find a more permenant solution (I have stream & springs on my property, both potable, but I still stockpile just in case). One of my test samples has gone four years in storage with no contamination, with no treatment (well water stored in Wal-Mart 7 gallon jugs stacked in first floor storage area).
I have about 100 gallons stashed. I basically never throw out plastic containers, they get washed and rinsed and filled with tapwater.
To be safe have your water tested for Cryptosporidium
Giardia lamblia and the rest,,,
> Waterborne diseases < is a good place to start,,,
Crypto collects on water filters and membranes that cannot
be disinfected,,,
Nasty stuff out there...