Shocking but true- All other filtered and even bottled spring waters are sterilized with UV light, ozone gas, and a sub micron filter. This is similar to how most juice and dairy products are pasteurized for shelf stability. Unfortunately this sterilization destroys beneficial sources of minerals and probiotics.
Apparently not a joke. The nyt has an article on it.
Start-ups like Live Water in Oregon and Tourmaline Spring in Maine have emerged in the last few years to deliver untreated water on demand. An Arizona company, Zero Mass Water, which installs systems allowing people to collect water directly from the atmosphere around their homes, began taking orders in November from across the United States. It has raised $24 million in venture capital.
https://www.nytimes.com/2017/12/29/dini ... tered.html
Of course raw water has some drawbacks, like
Giardia and Cryptosporidium
Escherichia coli 0157:H7 (E. coli)
And about a hundred others.