An excerpt from an article by Allan Richter and Linda Melone
Drinking Water Safely
No wonder so many health advocates recommend that people drink eight glasses of water a day, or more when you exercise. Water helps flush out toxins, carry nutrients to cells, ease digestion, regulate body temperature and is important for blood flow. Identifying our cleanest water sources, however, can be difficult—some tap water has been found to contain traces of prescription drugs and chemicals, while bottled water can leech chemicals in plastic and the containers needlessly occupy space in landfills.