A young girl was pulled from the pool at the Mill Woods Recreation Centre Friday evening and rushed to hospital in serious condition.
It happened at around 7 p.m.
Bystanders describe the girl as between 13 and 14 years old.
Lifeguards performed CPR until an ambulance arrived.
The pool was then evacuated and drained.
An Alberta Health Services spokesperson said the victim was in serious condition.
They did not say what caused the girl to be in medical distress.