drinking enough water?

we're doing a fitness challenge at work, and everyone who participates gets a 32oz water bottle that says 2-a-day on it. to encourage our (healthy) drinking habits, one of the hr glas sent out this info:

#1. 75% of Americans are chronically dehydrated.

#2. In 37% of Americans, the thirst mechanism is so weak that it is mistaken for hunger.

#3. Even MILD dehydration will slow down one's metabolism as 3%.

#4. One glass of water will shut down midnight hunger pangs for almost 100% of the dieters studied in a Univ. of Washington study.

#5. Lack of water, the #1 trigger of daytime fatigue.

#6. Preliminary research indicates that 8-10 glasses of water a day could significantly ease back and joint pain for up to 80% of sufferers.

#7. A mere 2% drop in body water can trigger fuzzy short-term memory, trouble with basic math, and difficulty focusing on the computer screen or on a printed page.

#8. Drinking 5 glasses of water daily decreases the risk of colon cancer by 45%, plus it can slash the risk of breast cancer by 79%., and one is 50% less likely to develop bladder cancer.