Hello well too much water means water it's good to keep your Kidneys flashed unless and until you have any problem like chronic renal failure... it's good to have 3-4 litres of water in a day.. and then it also depends upon the weather conditions if it is hot and humid you need to have more of work water to compensate for the loss thank you

2 to 3 litre is sifficient unless your water loss is more

Too much water intake can cause hyponatremia (low sodium level), which can cause headache and nausea. 1.5 to 2 litres of water would be enough per day in our country. In hot weather it can be more.