Why is bottled water bad for you?
In general, bottled water isn't bad for you. However, water that has been taken from impure sources and bottled without adequate treatment, or water that has become contaminated during the bottling or storage process can be unhealthy. That is why epople buying bottled water should be aware of the water sources used and the quality of the water provided by the different suppliers.
The only bad thing about bottled water is you can get pretty much the same thing out of the tap with a purification system of some sort like the "Pur" OR "Brita" pitcher system.