And the final complicating factor is the fact that you can't believe what the manufacturers tell you about their product. Unfortunately this just isn't true about most of them. Bottled Water Bottled water delivered to your door is relatively expensive, but convenient. Unfortunately, you're going to have to do more research to find out if the bottler is providing a high quality product. More than one third of bottled water sold in the U.S. originates in a public water system.
Chlorine is removed and minerals are added for taste.
Many bottlers treat their water with ozone, an environmentally safe disinfectant, which unlike chlorine, leaves no aftertaste. The International Bottled Water Association provides information and test results on bottled water. It's also a trade association for the bottlers, so exactly how good their information is, we don't know. The high end solution here is buying distilled water in glass bottles. Distilled water is totally pure, but has to be purchased in glass, otherwise chemicals from the plastic it's stored in will migrate into the water.