Q: How much water do I need to drink daily to be healthy?
A: How much water you need depends on your environment, activity and health. If you live in a warm, arid or high-altitude location, have a fever or exercise regularly, you will need more than normal. The easiest rule is the “8 x 8” formula: eight glasses of 8 ounces of fluid each day. Remember, some fluids have a diuretic effect and may add to water losses (such as coffee, tea and alcohol).
Richard D. Hansen, M.D.
Saint Joseph’s Hospital