Bottled water is the BIGGEST scam going on today. The mark-up alone is in the neighbourhood of %400!
The plastic used in the the bottle is high in Bisphenol A (banned in infant plastic products...tells you something)
Many bottled company use municipal tap water and send it through the SAME treatment processes. Check Desani (Coke's water) and Aquafina (Pepsi's water) both use tap water!
Kirkland (Costco's brand) has 20 mg/L of Sodium in 500ml bottles giving it it's taste. Ordinary salt
Tap water is the BEST source of water. Don't like the taste...put it in the fridge. Taste it again after a few hours..
How do I know.....This is what I do for a living.