The ACC Swimming Carnival – B Division is part of a series of interschool events run by the Associated & Catholic Colleges of WA, which includes a mix of Catholic, Anglican, and independent schools across the state.

This carnival brings together boys and girls from Years 7–12 to compete as one team for their school. Both genders contribute points across all year groups, with overall trophies awarded for boys, girls, and combined team results.

Schools are placed in divisions based on past performance, so racing is typically close and competitive, with a strong emphasis on team contribution and school spirit.

The Carnival will be live-streamed.