In Australia the tap water has very strict monitoring and is tested often. The water here tastes fine.
What is absolutely staggering is that bottled water is not monitored as strictly as tap water, yet costs about 1000x more. All those pictures of pristine waterfalls and bubbling springs are absolute bullshit. You are far more likely to get a hefty dose of chlorine or other containment from bottled water.
They are downright evil but kudos to the Coke marketing department. Who was the genius that pitched the idea of selling sub-standard water at 1000x the price of what we get from the tap? I'd have said its a ridiculous idea. Clearly I was wrong.
Personally, I use a soda-stream at home if I get a soda craving. Cheap, no health concerns, convenient and less impact on the environment. If I really feel I need some sugar I'll squeeze an orange into a litre of fizzy water. Still a bit of sugar but nothing compared to a coke.