I drink mineral water when there are problems with the water at home. Also when I'm out.
Mineral water is healthy, but not this that we buy from the markets. It's not 100% sure. I watched an interview with mineral water producer. They asked him "what water do you drink" he answered "flowing water". This is something to be.
Im not that conscious when it comes in drinking water. I only get to drink regular water, i mean tap water. I dont usually remember how many glass of waters i intake everyday. But for sure less than 8 glasses a day. Sometimes i forgot to drink water,lol. I am much into drinking coffee.