From Is America’s $8 Billion Bottled Water Industry a Fraud:

A 2001 World Wildlife Fund (WWF) study confirmed the widespread belief that consumers associate bottled water with social status and healthy living. Their perceptions trump their objectivity, because even some people who claim to have switched to bottled water “for the taste” can’t tell the difference: When Good Morning America conducted a taste test of its studio audience, New York City tap water was chosen as the heavy favorite over the oxygenated water 02, Poland Spring and Evian. Many of the “facts” that bottled water drinkers swear by are erroneous.

There is a LOT more where that came from in the very long article if you want to read it.

Basically here is a summary:
Bottled Water is no different then Tap Water!