[ceejayoz]

I suspect most developing areas without clean water supplies are simultaneously unable to afford buying bottled water. They're often drinking dirty water, which they may or may not treat.

[manmal]

Parts of the US have tap water you better not drink. I would imagine China is even worse.

[monort]

Bottled water is cheap, they buy it in 5 gallon bottles. I've seen that in many countries.