how much water do i need a day
âIt depends on your size and weight, and also on your activity level and where you live,â Nessler says. âIn general, you should try to drink between half an ounce and an ounce of water for each pound you weigh, every day.â For example, if you weigh 150 pounds, that would be 75 to 150 ounces of water a day.