How much water a day cause overhydration?
Although it depends upon your overall health, gender, activity level and weather conditions, on average if a person drinks about 3-4 litres of water within 4 hours or so then that person is likely to become overhydrated. If you are a healthy active adult, even then your kidney can’t excrete more than 1 litre of water per hour at the max. So drinking about 2 to 3-litre water in a whole day is advised.
