No, not at all common in mu culture. It's also not common on my locality at all. I live in the foothills of Himalayas close to a big river. We have the freshest and mineral rich water reserve and we get it through hand pumps or submersibles. We actually don't require boiling of water here.

Next, talking about cities in India, I haven't seen anyone doing boiling of water much often. Yes household water filter machines are very common. But, as we know that these machines impair water for minerals, I don't view it as a good practice.

I also don't view such research to be very useful. It'd be better if researchers try to find out how to provide for minerals rich fresh water at low costs to people.