| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:53.03 | Red Deer Catalina Valentine Meet | 2026-02-07 |
| 100m Breaststroke | 2:59.61 | Red Deer Catalina Valentine Meet | 2026-02-07 |
| 100m Freestyle | 1:37.03 | Neil Lepps 2026 | 2026-03-14 |
| 100m IM | 2:10.81 | Neil Lepps 2026 | 2026-03-14 |
| 50m Backstroke | 55.07 | Red Deer Catalina Valentine Meet | 2026-02-07 |
| 50m Breaststroke | 1:15.69 | Rising Rays 2026 | 2026-03-14 |
| 50m Butterfly | 1:09.62 | Rising Rays 2026 | 2026-03-14 |
| 50m Freestyle | 45.18 | Rising Rays 2026 | 2026-03-14 |
Chang, William's top personal bests include 100m Backstroke (1:53.03), 100m Breaststroke (2:59.61), 100m Freestyle (1:37.03), 100m IM (2:10.81), 50m Backstroke (55.07).
Chang, William swims for Edmonton Keyano Swim Club.
Chang, William has competed in 7 meets.