De-purified drinking water
To get straight to the point, all of the top selling brands of bottled water I am aware of that boldly claim to be purified water, are far from being pure water and have added ingredients.
It is argued that additional ingredients in bottled water are supposedly to provide a more palatable flavor (personally when I want water that is more palatable than water I drink orange juice....unless I want water, in which case I just want water) and apparently the added ingredients are found to occur naturally in water you would find at say, a spring in a plateau of a Himalayan mountain.
The Dark Side
While the chemicals added to bottled water are said to be safe, they have questionable properties or in fact downright disturbing affects in relation to their pharmaceutical use.
Let's look at the complete ingredients of Dasani purified drinking water by coca cola.

Potassium Chloride
- Naturally occurring mineral
- Essential to the human body
- Used in salt substitutes
- Dangerous to people with certain health conditions
- Can be added to food in unspecified amounts
- Irritant
- Fertilizer
- Injected as an abortion method
- One of a mixture of three chemicals used in lethal injection

Magnesium Sulfate
- Naturally occurring mineral
- Essential to the human body
- Epsom salt
- Can be added to food in unspecified amounts
- Laxative
- Salt subtitute
- Drying agent
Salt
- Well it just doesn't need to be added to drinking water unless you personally wish to add it to replace salts
Tap water (purified)
- Pure water (as you would expect purified water to be....Nope)
- Chlorine
- Iodine
Conclusion
I don't know if is actually safe to consume the recommended daily intake of water from bottled water brands.
There is speculation that the chemicals added serve to dry your mouth in order that you are inclined to drink/buy more water in a futile attempt to quench your thirst.
To purify water so you can call it purified water on the label yet de-purify it with additional chemicals to be sold for consumption is misleading and criminal as far as I'm concerned. Some of the brands depict a mountain setting in the background of the label when in reality the water was sourced from a tap plumbed into the local water supply.
Not only does it appear that there is nasty stuff inside the bottle, the bottle itself is made of pretty nasty stuff.
