Over the years I've noticed a snobbery factor with drinking/not drinking tap water. People think it's bad, or low quality, or unclean or whatever but it's not! I was brought up to drink tap water only if it's boiled or filtered but I'm like 'screw that'. I've been drinking tap water since my teens...
In all Anglo and Western European countries the water is PERFECTLY SAFE to drink. So you don't need to waste money by buying bottled water... unless you really want to of course.
So, without further ado, here is the list! All in Europe, except New Zealand. I'm curious where Australia is on the list...