Question: is 1/2 gallon of water a day enough?
Answer: Does Drinking a Gallon of Water a Day Have Benefits? Hydration needs are highly individual and depend on many factors, including your body size and activity level. Many people follow the 8x8 rule, which recommends drinking eight 8-ounce (237-ml) glasses, or about half a gallon (1.9 liters), of water daily.