| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:25.77 | June Performance Meet 2025 | 2025-06-06 |
| 100m Backstroke | 1:15.45 | 2025 NYAC Cup | 2025-11-14 |
| 100m Breaststroke | 1:37.45 | June Performance Meet 2025 | 2025-06-06 |
| 100m Breaststroke | 1:32.59 | 2025 OAK Brad Townsend Fall Classic | 2025-10-17 |
| 100m Butterfly | 1:17.26 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 100m Butterfly | 1:15.58 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 100m Freestyle | 1:04.38 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 100m Freestyle | 1:05.64 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 200m Breaststroke | 3:16.05 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 200m Breaststroke | 3:09.68 | 2025 NYAC Cup | 2025-11-14 |
| 200m Butterfly | 2:54.97 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 200m Butterfly | 2:50.18 | 2025 NYAC Cup | 2025-11-14 |
| 200m Freestyle | 2:21.90 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 200m Freestyle | 2:22.77 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 200m IM | 2:56.20 | June Performance Meet 2025 | 2025-06-06 |
| 200m IM | 2:41.56 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 400m Freestyle | 5:25.74 | June Performance Meet 2025 | 2025-06-06 |
| 400m Freestyle | 5:07.40 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 400m IM | 5:50.63 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 400m IM | 5:52.28 | 2025 NYAC Cup | 2025-11-14 |
| 50m Backstroke | 34.70 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 50m Breaststroke | 42.69 | David Lawson Invitational 2026 | 2026-01-23 |
| 50m Butterfly | 34.17 | 2025 NYAC Cup | 2025-11-14 |
| 50m Freestyle | 29.63 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 800m Freestyle | 11:05.49 | June Performance Meet 2025 | 2025-06-06 |
Chang, Sunnia's top personal bests include 100m Backstroke (1:25.77), 100m Backstroke (1:15.45), 100m Breaststroke (1:37.45), 100m Breaststroke (1:32.59), 100m Butterfly (1:17.26).
Chang, Sunnia swims for Oakville Aquatic Club.
Chang, Sunnia has competed in 6 meets.