Water - it's one of the simplest substances known to man yet one of the most critical to our health and survival. It is also one of the easiest substances to contaminate. Often called "the universal solvent", water has a tendency to dissolve a little of everything it comes in contact with, from beneficial elements to harmful chemicals, minerals and other contaminants. Some of these impurities occur naturally in water while others enter water supplies through complications with aging municipal water treatment systems, ground water well, or internal home plumbing systems. That's why a growing number of people are turning to home water treatment systems to ensure clean, fresh drinking water in their homes.