In some people, the first symptom of acute kidney failure is water retention, with swelling of the feet and ankles or puffiness of the face and hands. People may pass cola-colored urine, which may indicate a number of kidney diseases. The amount of urine (which for most healthy adults is between 3 cups [about 750 milliliters] and 2 quarts [about 2 liters] per day) often decreases to less than 2 cups (about 500 milliliters) per day or stops completely. Very little urine production is called oliguria, and no urine production is called anuria. However, some people with acute kidney failure continue to produce normal amounts of urine.