Long term water purification

[Tartar Horde]

I believe you can revitalise distilled water by simply decanting it into another container from a height. This forces Nitrogen, Oxygen and all the other elements into the water as air bubbles are created during pouring.
Water for me is the biggest problem, as without it we have to bug out. For me the simplest and safest way to treat water is simply to boil it, it has worked for millenia