There's an article on Shine/Yahoo News about the quality of bottled water vs tap water. You can read it here if you want. Here's their grading of the top ten brands:
How does your bottled water brand stack up? Here's a look at the 10 top-selling* U.S. brands:
1. Pure Life Purified Water (Nestle), EWG grade = B
2. Arrowhead Mountain Spring Water (Nestle), EWG grade = C
3. Aquafina Purified Drinking Water (Pepsi), EWG grade = D
4. Dasani Purified Water (Coca-Cola), EWG grade = D
5. Deer Park Natural Spring Water (Nestle), EWG grade = D
6. Ice Mountain Natural Spring Water (Nestle), EWG grade = D
7. Ozarka Natural Spring Water (Nestle), EWG grade = D
8. Poland Spring Natural Spring Water (Nestle), EWG grade = D
9. Zephyrhills Natural Spring Water (Nestle), EWG grade = D
10. Crystal Geyser Natural Alpine Spring Water (CG Roxane), EWG grade = F
Filtered tap water received the best grade (an A) from EWG because if you change your filter regularly, EWG says it is purer than bottled water, plus it saves money (bottled water can cost up to 1,900 times more than what flows from your tap). Drinking tap water also takes less of a toll on the planet. EWG offers plenty of tips for filtering your tap water so that you can drink the healthiest water possible.
Never understood why people pay for bottle water, I have a filter on my tap at home, and a water bottle I just fill up from there. Better than spending $2 on a bottle everyday.