The topic of hydration has always been debated, growing up we're told 8 glasses of 8 ounces of water (equaling 64 US fluid ounces) is ideal. The article linked in this question from University Hospitals discusses this subject, answering the question of: can you drink too much water?
The website is a registered organization, as understood by it being a .org site, with the article being fairly recent (posted in January of 2024), which makes the contents of this article generally trustworthy. The article discusses the consequences of overhydration and what it is, and goes into answering the sub-questions of: how much water is enough, and how much water is too much? They answer these sub-questions by dismissing the myth of eight, 8-ounce glasses of water a day, and explain that there is no set amount of healthy water intake - rather, that it is subjective to each person, their health and activity/exercise status, and their overall lifestyle.
Under further inspection, Gundersen Health and Cleveland Clinic both publish articles on this matter, discussing what water intoxication (also known as overhydration) is. Both articles do great at explaining the topic, how to avoid it, and the Cleveland Clinic article - which has been medically reviewed lastly as of September 2024 - recommends the daily intake for adults is 125 ounces (3.7 liters) for males and 91 ounces (2.7 liters) for females; yet both primarily suggest to trust your body by drinking when you are thirsty, and to keep an eye on your urines color.
The Mayo Clinic, in an article answering the question: how much water should you drink everyday, sources:
The U.S. National Academies of Sciences, Engineering, and Medicine, who have determined that an adequate daily fluid intake is:
- About 15.5 cups (3.7 liters) of fluids a day for men
- About 11.5 cups (2.7 liters) of fluids a day for women
These recommendations cover fluids from water, other beverages and food. About 20% of daily fluid intake usually comes from food and the rest from drinks.
In summary, the statement "You can drink too much water", is true but fairly uncommon and rarely life threatening.