Firefighters were called to the Birchwood Community Pool at 435 W. Illinois at around 1:20 p.m., according to Palatine Deputy Fire Chief Scott Mackeben.
When the fire department arrived, a lifeguard was performing CPR on the child, Mackeben said.
The victim who is described to be a girl between five and eight years old, was conscious and talking before being transported to the hospital, said Mackeben.
The girl is now at Lutheran General Hospital in an unknown condition.