too much water?

hello. My son is 16months and eats all family foods, has breast milk and normal milk. But he drinks what  i would consider an excessive amount of water. he is always pointing to water bottles, wanting more to drink. Should we be concerned about this? Thanks

[Renee Radenberg]

His weight is just below the 50th percentile and his height is between 25th-10th percentile for his age. For a 16 month old he should be drinking 12-16ozs (.36 -.48mL) a day of milk / breast-milk plus 4-6oz 100% fruit juice a day. Is he drinking that much breast-milk / milk and juice at meals or between meals? If you still feel he is drinking excessive amounts of fluids then have him checked by his MD.

[krissy500]

I am unsure about the oz. He drinks over 500ml of water a day, I'm not sure how much breast milk, but he has a drink 3times per day before arvo sleep and night sleep, and also about 100ml of whole milk in a cup a day. The weight and height i gave you were from his 1year old check approx 4months ago, so may be more by now. He eats all family meals and grazes all day.