She attended Rancocas Valley Regional High School in Mount Holly, where she graduated as part of the class of 2012.

At the NCAA finals in March 2015, she broke the 13-year-old record held by Natalie Coughlin, and became the first woman to break 50 seconds in the event.

In Rio de Janeiro, Worrell placed 4th in the heats of the 100-meter butterfly but failed to qualify for the finals after finishing 9th in the semi-finals.

[5][6] In 2019 she was a member of the inaugural International Swimming League representing the Cali Condors, who finished third place in the final match in Las Vegas, Nevada in December.

Dahlia won the 100-meter butterfly at the final beating world record holder Sarah Sjöström for the second time of the season.