The United Kingdom Government agree with the World Health Organization that water is critical to human life.
In temperate climates, such as the UK, the Government advise that six to eight glasses (about 1.2 litres) of water, or other fluids, should be consumed every day to prevent dehydration. This amount should be increased when the weather is warm or when exercising. Fluid intake is also achieved through food eaten.
The Government have commissioned no specific research on the health effects of drinking water but keeps abreast of research in this area.