Emergency crews got a call around 5:30 Wednesday afternoon from the Dakota Garden apartments near Dakota and Ninth.
A woman was swimming with her boyfriend when she suddenly went under. The boyfriend wasn't able to pull her out of the water and started knocking on doors for help. A neighbor eventually helped pull her out and perform CPR.
Firefighters continued trying to revive the woman, but were not able to get her breathing or find a pulse. The woman was rushed to the hospital, where she was declared dead.
