Guidance from the FSA

Water contributes to the maintenance of normal physical and cognitive functions, and normal regulation of the body’s temperature.

*The European Food Safety Authority (EFSA) recommends an adequate daily intake of water (from food and drink consumption) of 2.5 litres of water for men and 2.0 litres of water for women, in conditions of moderate environmental temperature and moderate physical activity. Different levels apply to children, and pregnant/lactating women. To some a good starting place might look like 10 small glasses of around 200ml per day but volume required will vary from person to person.

To benefit, at least 2L of water from all sources, should be consumed daily: https://bit.ly/EssentialGuidetoHydration