I read about 3 liters, but there are doubts that this is relevant for all people. People of different builds are. If you know what confirms this norm, please tell me.
There are smart tables by which you can calculate how much water our body needs, depending on our body weight. I'll put it easier, as soon as there is a desire to eat something, to drink, to wish, feel free to drink a glass of water. Too much water is also not good! Everything should be in moderation, even natural energy drinks!
Drink as much as your body desires and demands, do not listen to all these stories about 2 liters a day or three, these are all someone's conclusions made from the air, each organism Works in its own way. It takes most of the moisture from food and not from pure drinking, thoughtless drinking can cause swelling and other consequences