Supervision also is key to prevention, especially with toddlers. Because their capabilities change everyday, toddlers often do the unexpected, like opening closed pool gates they previously could not open. Knowing how to swim doesn't make a child drownproof. Watch children closely while they are in the pool. If a child is missing, always look in the pool first.
Seconds count in preventing death or disability.
Keep rescue equipment by the pool, and be sure a phone is poolside with emergency numbers posted.