I went to a Naturapath and she said I should be drinking 3 litres of water a day and the tea I drink does not count. That not counting if you do any riding then it should be more.
She says it is good for ones digestion. Also she wants me to drink some water with a little bit of apple cider vinegar as this gets yur digestive system a boost.
A guy from work told me he heard a doctor say on a health show that would be too much water as it could stress your kidneys and even cause them to eventually to fail.
I find dirnking that much water not so easy. Not a good idea if you have to get in the car and go anywhere far.