| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:30.05 | Otters Spooky Splash 2025 | 2025-10-24 |
| 100m Breaststroke | 1:34.26 | Elaine Thompson Memorial Meet | 2026-01-24 |
| 100m Freestyle | 1:13.73 | Elaine Thompson Memorial Meet | 2026-01-24 |
| 200m Backstroke | 3:13.98 | OSAC Team Challenge Short Course Swim Meet | 2025-11-14 |
| 200m Breaststroke | 3:25.33 | Elaine Thompson Memorial Meet | 2026-01-24 |
| 200m Freestyle | 2:54.35 | OSAC Team Challenge Short Course Swim Meet | 2025-11-14 |
| 200m IM | 3:23.78 | Otters Spooky Splash 2025 | 2025-10-24 |
| 400m Freestyle | 6:20.57 | OSAC Team Challenge Short Course Swim Meet | 2025-11-14 |
| 50m Backstroke | 40.37 | Elaine Thompson Memorial Meet | 2026-01-24 |
| 50m Breaststroke | 44.75 | Elaine Thompson Memorial Meet | 2026-01-24 |
| 50m Butterfly | 46.70 | GMAC Dash for Cash | 2025-12-05 |
| 50m Freestyle | 32.28 | Elaine Thompson Memorial Meet | 2026-01-24 |
Ross, William's top personal bests include 100m Backstroke (1:30.05), 100m Breaststroke (1:34.26), 100m Freestyle (1:13.73), 200m Backstroke (3:13.98), 200m Breaststroke (3:25.33).
Ross, William swims for Collingwood Clippers Swim Club.
Ross, William has competed in 7 meets.