Actually it is, but then again, you need to know how much plenty is. How much water your body needs would depend on:
1. Your body size:
The bigger you are, the more water you have to drink. A rough estimate is to divide your body weight in pounds by 16. The figure you get would represent the number of 8-ounce glasses of water you should drink.
2. Your sweat and activity level
If you do not sweat much, you can just stick to your recommended daily water stated above. But if you are a sports athlete or you sweat a lot, you should add more glasses of water.
3. The type of foods you eat.
If you eat salty/dried/baked/toasted/roasted food, you need to drink more water. But if you drink lots of soup, you need to cut down on water intake.
Drinking more water than needed will cause serious problems, namely:
2. Water intoxication
To get detailed explanation on this, search up on Ultracycling Drinking Too Much on Google. So next time you think you are doing your body a favor by drinking lots of water, think again. Balance is the key.