There's no national testing for Cryptosporidium cyst in bottled water. There is no requirement for putting expiration dates on bottled water. Stored bottled water can be a breeding ground for bacteria. Pierre Payment, a Canadian researcher, found bacteria counts in bottled water even higher than in tap water. Storing water in soft plastic containers can increase the potential for a higher concentration of leached contaminants.
Water can smell and taste like plastic.
Water can grow bacteria or pick up tastes and odors from the container if left too long in a warehouse, on a truck, or even on a supermarket shelf. Health Most experts agree that there is little scientific evidence that drinking bottled water is healthier. Clear, bottled water does not necessarily mean pure and healthy. The FDA admits that it does not individually monitor the bottled water industry but rather relies largely on self-regulation by the bottlers. The average cost of bottled water is 89 cents per gallon.