Elisam Santana, 19, of Sayreville was swimming at Beltzville State Park in an unauthorized area of the lake, said Carbon County Coroner Gerald D. Jones Jr.
Santana, the coroner said, had saved his 8-year-old cousin from drowning when he went under the water and never came back up.
At Santana's autopsy on Tuesday, Aug. 8, his death was ruled an accidental drowning, Jones said.
Click here to follow Daily Voice Edison and receive free news updates.