An aside to the main argument.
1) A new nanotechnology water filter has been invented that uses only 1/4th of the energy of typical reverse osmosis, energy that might even be provided manually. It does this with a filter full of nanotubes only wide enough to pass water molecules, nothing larger. So the output truly is pure water.
Ironically, it would probably be good over extended use to add a small amount of sea salts to such pure drinking water, for the tiny quantity of trace elements the body needs. In turn, this would give those who abhor fluoride and other contaminants an easy way to avoid them in their potable water.
2) Solar distillation is also becoming a realistic alternative to purchasing distilled water, for the increasing number of household uses. However it is less desirable, because it may also pass some hazardous contaminants that vaporize at lower temperatures than water and condense back into the water.
Could you PM me some further info on that H20 filter system you are referring to?
Thanks.