Probably? This kind of thing would be done through school and as far as I know very few elementary schools have swimming pools.

It depends what you mean by "compulsory" - e.g, like public school is compulsory (can't graduate), or just that everyone gets the chance to do it (required class).

The local public school system here has a deal with the recreation center to do swimming lessons during the school year. But that's going to be a very local thing unless a state mandates it.