Is there such a thing as "paleo" water?

The city I live in doesn't have water fit to drink, so we get purified
water, made, I think, by reverse osmosis and filtering.

Granddad Neanderman, of course, got his water from a river or a spring, and
it was prolly full of all sorts of good minerals.

Should I be drinking mineral water?  I'm not even sure what that is ...

Robert