Scientists created ways to produce clean treated water along 20 century, a revolution at the time, and today fight to find better and more economic ways to bring clean treated water to help poor countries or ways to recycle water in places with limited water resources.
But wait, californian millionares are paying more than 5 dollars per liter of dirty water :
Silicon Valley’s Next Big Idea: Untreated Drinking Water | Fortune
https://www.menshealth.com/trending-...er-overpriced/
If I get water from my toilet, and label as natural water rich in probiotics, I bet there will be milionaires to buy it.