Ask your pedi everyone is different we were told one ounce a day at 6 months

I got the ok for 4-6 oz a day at her 4 mo visit. I give her about an oz a day

My pedi said when I start solids to start 4 ounces of water over the course of the day. To help keep kiddo hydrated as they process solids for the first time because other wise they can get constipated. So for us that was at 4months when we started oatmeal. She's a year now and she loves water

I started giving my son a little bit of water in a sippy cup around 6-7 months. He loves water! But I don't give him more than 2oz