"Accidental drowning" means the act of unintentionally suffocating or dying by being submerged in water, usually as a result of an unexpected or unintentional event. Full definition
If you do use a wet pail please make sure that you have a securely locking lid on your pail to protect your babies from accidental drowning. (diaperpincorner.com)
To help protect your child from accidental drowning, make sure her outdoor play area doesn't have even a small source of water. (babycenter.com)
The figures show that 300 people died in accidental drownings in the UK last year. (qaeducation.co.uk)