re distilling
I understand that as a concern. Pure distilled water as drinking water can mess up the fluids and electrolites.
However, I’m wondering that if you are able to have other minerals and salts from other areas of one’s preps, then perhaps in the interest of not dying from possible chemical contamination, distilling could be an option for some who may not have or afford a Big Berkey as you describe.
Just a possible option, especially in a short term situation. It seems that could also apply to folks who are in an area where the ground water is possibly contaminated with agricultural/oil-gas drilling chemicals.
For the short term, if you had to have water or die, drink distilled if that is what you have. The situation determines what must be done to sustain life.