"The quest for pure water is hardly new; people have been drinking from natural springs and collecting rainwater from time immemorial. The crusade against adding fluoride to public water began in the 1950s among Americans who saw danger in the protective measures that had been adopted over decades to protect the populace from disease and contamination. But the off-grid water movement has become more than the fringe phenomenon it once was, with sophisticated marketing, cultural cachet, millions of dollars in funding and influential supporters from Silicon Valley."
One can also purchase water collection systems that capture moisture from the air.
From a safety perspective, without treating water, one opens themselves to increased risk to a host of microbial pathogens including bacteria and parasites such as Giardia and Cryptosporidium, . Beyond that, people across globe do not have access to clean water and would prefer avoid drinking 'raw' water. The article below, from National Review, sums that up pretty well.
National Review
‘Raw Water’ Makes a Mockery of Human Suffering
Read more at: http://www.nationalreview.com/article/455235/raw-water-movement-mocks-human-suffering
by Jibran Khan January 8, 2018 1:05 PM
It’s a play-act of poverty that puts ‘slum tourism’ to shame. Every few months, there’s a new trend that promises life-changing health benefits — a spice, or a juice, or another mundane consumable, often with an Indian or East Asian name thrown in to make it seem ancient and exotic. We see these things, laugh, and move on with our lives. We live and let live.