Polite Paradise

In Ontario, if you are on municipally supplied tap water, it is probably just about the safest water going, after the tragedy in Walkerton in 2000.  I grew up on well water from a drilled well, which is also a secure source.  You can get it tested for bacteria up to 4 times a year with your local health unit.  So I drink tap water pretty much exclusively, usually carrying my own water bottles when I'm out and about.

If I'm travelling, I'll ask my hosts if the tap water is good or if I'm going to be m/hotelling it, I'll do a little research ahead of time to see what the tap water is like.  There are a couple of places - in North America - where I chose not to drink the tap water because of my research.