DEPENDS HOW FAST. It is not really how much water you drink, but rather how fast you drink it. Normally, a person requires about 3 quarts of water each day where most of it is from food so 8-12, 8oz glasses a day is the recommended intake in addition, the average healthy person should ingest no more than 8 oz. (240ml) in roughly an hour giving the body adequate time to absorb it. Max appeares to be < 1liter/hour.