Our bodies are comprised of over 70% water and we must ensure correct hydration for the maintenance of good health.  Water plays a role in nearly every bodily function including digestion, circulation, toxin removal and temperature regulation.    Water is the most important thing we can put into our body.  There is scientific evidence that the failure to drink enough water can lead to Chronic Cellular Dehydration and this plays a huge role in many disease states.

"A reduction of 4-5% in body water will result in a decline of 20-30% in work performance”.  NY Times Guide to Personal Health

Water treatment plants only have to ensure water does not contain pollutants above a "certain level” and of course, once water leaves the treatment plant it can be exposed to rust and lead before it reaches your tap.    There is a strong chance that every glass of water you drink from your tap will have been exposed to waste systems, fertilisers, herbicides, soil fumigants, aluminium sulphate, harmful bacteria and nitrates; it will then have been treated with a variety of chemical substances including chlorine and fluoride - apparently to disinfect the water and prevent tooth decay, but both chlorine and fluoride are toxic substances.