Queensland won a thrilling Inter-State championship, to take the William B Phillips Trophy from arch rivals NSW, in a title race decided on the last two events.

In the first event of the night, Sophie Edington from Loxton, South Australia lowered her own Australian and Australian All-Comers 50m freestyle record by 0.01 - clocking 26.04.

In other outstanding swims on the final night, 14-year-old Brisbane schoolgirl Alice Mills won her fifth individual gold medal of the championships, when she won the 100m freestyle final in 57.54 in the second Chandler trifecta of the meet with Clair Barrett second in 58.34 and Sara Illing third in 59.24.

Mills also won three relay gold medals - one with Queensland and two with Chandler - taking her gold medal tally to eight.

Gosford's brilliant 14-year-old Ryan Johnson won his fifth and sixth gold medals of the championships, winning the 13 years and under 200m backstroke in 2:11.46 - just 0.18 seconds outside the Australian record and 100m butterfly in 1:00.06.

Olympian Jennifer Reilly completed her "iron woman" week, adding her fourth gold medal in the 200m individual medley in 2:18.00, before completing her week with her second silver medal in the 800 metres freestyle in 8:47.74.

Reilly will now prepare for the Ninth World Championships in Fukuoka, where she will contest the 400m individual medley.

Wilkinson's Melissa Mitchell won the 50,100, 200 and 400 metres freestyle in the 13 years and under age group.