How long I can live without water?

A short time, rather than airless anyway.
 Without air, water and food man can not live too long. As time, the air is first we need, then water and then food.
Without water it can live up to 40 days according to the Bible: Jesus, Moses - classic examples. But depends on many factors.
 For example climate. In desert, in full sun, may need only one day to destroy a man. And of course, depends on the lifestyle of everyone. A man who smoke and drink alcohol more will be much faster killed by thirst

2 liters of water per day

So experts say: a man needs at least 2 liters of water per day. Normally this amount depends on many factors: height and body mass, temperature, physical effort, the food.
A man with a height of 1.63 m and a weight of 57 kg will need less water than a 2,15 m tall and weighing 120 Kg. Can not uniformity of the need for water. (It's like I have a mouse and an elephant. 2 liters of water? Mouse will not drink that amount and the elephant will die of thirst.)
Temperature - cold days when a man would not feel the need for more water, but the hot weather is different.
Effort - physical effort a man makes the need for water (thirst) is much higher than for a man who is sedentary.
Food - a food that consists of soup and salad will bring a minimum water needs, but a solid food and full of spices will increase the need for water. So: 2 liters of water per day are useful as standard, but it depends on each person. Most importantly, be water not beer or soft drinks, thirst is covered only by water.