[Dafni]

I said the purest water that occurs in nature, from a chemical point of view. Natures way of distilling water. The minerals stay in the sea. If you know what I mean.

But nevermind. Just don't mention rivers and the ocean.

You're definitely right about the pollution. A disgusting state of affairs.

But even without pollution at all, just dissolved CO2 (forms carbonic acid) makes the rainwater to a very weak acid....making it to dissolve limestone.

Long story short: water is conductive. Don't use your hairdrier in the tub.