Way too much!

1 gallon is WAY too much water to drink in one day! Generally, you should have about 64 fluid ounces of water a day, but it varies based on your activity. A gallon is 128 fluid ounces! No WAY should you be drinking that much. Please dont try to drink a gallon a day- it can damage your health. Unless your an Olympic athlete.

Melody pocket heart about 1 Gallon a Day