There is concern over the plastic bottles as the type of plastic could be dangerous or toxic. They say be careful of any bottle that has a recycle number of 7 on the bottom or higher. You want to stick with 1's and 2's.
As far as water itself I stick to my favorite which is Zephyrlhills natural spring water out of Florida. http://www.zephyrhillswater.com/
they have their water quality listed here http://www.nestle-watersna.com/pdf/ZH_BWQR_123106.pdf#page=3


