Chlorine and lead are two of the most common contaminants in water. Chlorine is a strong oxidizing agent that may increase the risk of heart disease and is linked to certain cancers. Even small amounts can lead to organ damage and stunt the nervous system.
Bottled water is only a temporary solution to the problem.
It is too expensive for regular use, and you cannot count on its safety. Recently, I became aware of new technology for distilling water at home that does the job better than earlier purification systems. But I've always thought distilled water was really the best water filtering method. However, I believe that our primary sources of minerals are fruits and vegetables, not water. In fact, our bodies have very active systems for holding onto the minerals we need.