A water question [View all]

I dunno if this is the right spot, but does anyone know how hard it is to make distilled water? Idle curiosity, if anyone can help me here

Three scenarios, just to spark ideas if anyone cares to jump in...

Ocean water, home on a deserted island with no fresh water, but plenty of solar power.
Contaminated stream water below a mountaintop removal area, well went dry.
Collected Rainwater or greywater reuse.


I dunno. I started reading about Puerto Rico, which lead to reading about the unorganized us territories. Lots of little uninhabited islands, mainly with the drawback of no fresh water. But I hate the heat and dont eat fish so much, so then I started thinking about where one might shack up in a more temperate place. But then I realized is unlikely to ever happen, but I might just be able to go off/lower grid if I ever get lucky in jobs/money/resources. Or maybe this is easier to do than I would think.

Plus I want to clean my monitor screen, and they say to use distilled water for this, or you will get mineral streaks. And its too late to go to the grocery store.

So how hard is it to make drinkable water out of salt/contaminated water?