I live in a country where, despite 70% water (I know, seawater) and lots of rainforests, most urban people drink bottled water (single-use and refills). Talk about selling ice to Eskimos. Probably because the ice outside is polluted, and it's easier to buy instead of fixing the root cause.

Anyway, ignoring the effect on nature since we clearly don't care about it, how damaging would the effect be to people who consume water that way, daily?