BOTTLED WATER VERSUS TAP WATER

Bottled water advertisements show pictures of mountain springs which give the impression the water in the bottle is taken from a perfect source. The fact is, bottled waters are produced in the bottling plants supplying soft drinks directly from local municipal water supplies.
Tap water has strict state and EPA testing requirements, bottled waters have fewer testing standards. The safest bottled waters are drawn from tap-water sources and those sources must meet the standards called out in the Safe Drinking Water Act.
The value from bottled water is merely a convenience and high price. Bottled water is water packaged in bottles and sold commercially in the market for drinking purposes. Tap water is the common household water, which every individual receives in the house.

Following are eye opening facts which directly taken from the source given at the end;

Some of the Facts About Bottled Water

• It isn't held to the same testing standards in some areas as tap water.
• When heated, water bottles can leach BPA into the water.
• Bottled water is often tap water! There's a difference between "filtered water" and "natural spring water." Natural spring water from an actual spring. You'll find filtered water on the market for just as much as spring water, which is really just filtered tap water.
• Treehugger.com (see the article above) estimates that bottled water uses 6x the amount of water actually in the bottle to produce it! What a waste!
• Another fact from Treehugger: bottled water production uses large amount of oil to produce the bottle.
• Transporting the empty bottles to their filling destinations uses energy and releases harmful emissions. Then, transporting the heavy filled bottles uses even more energy. Just so you can twist the cap for some filtered tap water!

http://www.squidoo.com/bottled-water-vs-tap-water