Drinking an adequate amount of water is essential for maintaining healthy kidneys. Water helps to flush out toxins and waste products from the kidneys, preventing the formation of kidney stones and other kidney problems. However, drinking excessive amounts of water can be harmful and put a strain on the kidneys, so it's important to stay hydrated in moderation. A general guideline is to drink at least 8 glasses (64 ounces) of water per day, but individual needs may vary depending on factors like age, activity level, and overall health.