[Tilted Irish Kilt]

TEXOKIE:" Isn’t it also possible to purify by distilling it, as if it were sea water, and the copper, etc would end up as salts?"

Not sure about the salts and trace minerals.
I have seen people , especially those from the South , who say that they will get water from their air conditioner (assuming electrical power exists)in SHTF
That water is basicly condensation without benefit of trace minerals or salts.
Liquid yes , ... but absent of trace minerals and salts necessary for cellular developement or cellular replication .
It might be suitable for growing crops in drought conditions,but those same plants would get missing minerals and salts from contact with the ground.

[driftdiver]

Also, it requires a lot of energy to boil water. If your heat source is wood you’ll spend a lot of time cutting wood and tending the fire.