Oh my. Scientists discovered that impure water can be distilled into potable water. Even after throwing a block of wood into the water.
Make a solar still. Not for liquor, just for water. Far less stringent requirements for water than corn mash. As pointed out earlier, distilled water is not good to live on. It needs some minerals to make it worthwhile.
As the Good Book says, salt for the savour. Only a little, and make sure it's iodized.