| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:23.12 | Brockville Freeze Fest 2026 | 2026-01-18 |
| 100m Breaststroke | 1:36.59 | Brockville Freeze Fest 2026 | 2026-01-18 |
| 100m Butterfly | 1:35.33 | 2026 February Freeze Invitational | 2026-02-14 |
| 100m Freestyle | 1:12.83 | Perth Candy Cane Meet | 2025-12-12 |
| 100m IM | 1:19.61 | 2025 Maddy Kort Invitational | 2025-06-20 |
| 200m Breaststroke | 3:27.76 | 2026 February Freeze Invitational | 2026-02-14 |
| 200m Freestyle | 2:37.22 | 2025 Maddy Kort Invitational | 2025-06-20 |
| 400m Freestyle | 6:05.52 | Wave Swim Cup - The Holiday Hurrah | 2025-12-21 |
| 50m Backstroke | 39.06 | PPSC Cabin Fever | 2026-02-28 |
| 50m Breaststroke | 42.99 | 2025 Maddy Kort Invitational | 2025-06-20 |
| 50m Butterfly | 37.20 | 2025 Maddy Kort Invitational | 2025-06-20 |
| 50m Freestyle | 32.36 | PPSC Poppy Meet 2025 | 2025-11-29 |
| 800m Freestyle | 12:27.60 | 2026 February Freeze Invitational | 2026-02-14 |
Sahrakorpi, William's top personal bests include 100m Backstroke (1:23.12), 100m Breaststroke (1:36.59), 100m Butterfly (1:35.33), 100m Freestyle (1:12.83), 100m IM (1:19.61).
Sahrakorpi, William swims for Capital Wave.
Sahrakorpi, William has competed in 7 meets.