I don't know of any place that charges for tap water in America. I do know of many places where I would not drink the tap water in America, it just tastes weird to me compared to what I'm use to.

There are places you have to ask for tap water, where they will not bring it to the table when you sit down.

Soda is sometimes refilled and sometimes not. Iced tea is usually refilled for free, but you of course have to pay for the first one.

Many places will refill a cup of coffee for free.

Anything else is probably pay for refill.