How much water is too much?

How much water is too much? I’m petite, but I drink three liters a day. -Lina P., Northvale, NJ

The amount of H2O you need depends on how much you sweat, not your size. If you’re a jogger in Miami, three liters might be perfect. But if you live somewhere cold and slack on exercise, it could be excessive. Keep an eye on your pee. If it’s dark yellow, you need to drink more; if it’s clear, you may have gone overboard. Sip about eight cups of water throughout the day (don’t chug it all at once!) and you should be just fine.