Can You Drink Too Much Water?

yes!
i can be bad for you if you drink too much WATER ,and not enough things like gatorade, and powerade.
well, its not actually the drink its the thing inside the drink.
im not sure what it is called

Yes
http://chemistry.about.com/cs/5/f/blwaterintox.htm

Yes. You can screw up your electrolyte balance. It makes you feel drunk, actually.

PS You don't need Gatorade for electrolytes. Water with a little sugar or honey and salt will do the trick for about 1/10 of 1% of the cost.

actually, I think that you need sodium

like salt

Yes, you can die. Though it takes a LOT of water. Marathon runners have overhydrated themselves and died.
http://en.wikipedia.org/wiki/Water_intoxication