Why is there a burgeoning use of bottled water and home treatment devices when U.S. citizens are enjoying some of the highest quality drinking water in the world? Might our concern appear excessive, even frivolous, considering the serious drinking water problems many countries face throughout the world. For example, the United Nations reports that 1.75 billion people in the world lack adequate drinking water and that more than 3 percent of all deaths in developing countries are directly related to contaminated drinking water.