How much can a person drink water?

The amount varies according to the person's size and water output. Bigger people and/or those with high volumes of pee or sweat or vomiting or runs need more!

If you drink faster than you can excrete the extra, you will drown from it.

As a child, my brother and I had a well-water drinking contest. We were punchy! And peed a LOT for the next couple of hours.

So, like almost anything GOOD, more is not always better!

That said, most of us (as in US, population of US) would have more energy and fewer headaches if we drank more water....