Ok. Obviously ppl do not understand. We are required to drink 10 glasses or 2 litres of water per day. You can drink more if its hot weather or exercising. Some ppl have a disorder where they have to drink water too regularly therefore causing a sodium deficiency which lowers there sodium levels dangerously which may cause seizures or even coma. Google ppl.
I remember seeing an episode on "House" where a young adult died from chugging too much water. Too much of anything CAN kill you! All things in moderation is the way to go. If you're so thirsty that you WANT to drink that much, you should see your Dr. and get tested for diabetes.
Thats much more than you really need to remain hydrated. If you are constantly thirsty it's maybe a good idea to mention this to your doctor. Otherwise a couple of litres of water spread out through the day should be enough to keep you healthy. If you are training hard, a good isotonic drink will hydrate you better than water. Problem here is that most of them are sweet and sticky. I've used H30 Pro and would recommend you check it out. Quick point: a dry mouth (thirst) is the last sign of dehydration. Don't wait until you are thirsty to drink water!