| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:15.58 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m Breaststroke | 1:21.41 | OUA & Club Winter Invitational | 2026-01-17 |
| 100m Butterfly | 1:13.24 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m Freestyle | 1:03.63 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 200m Breaststroke | 3:10.51 | MAC Jingle Bell | 2025-12-12 |
| 200m Butterfly | 3:18.26 | MAC Jingle Bell | 2025-12-12 |
| 200m Freestyle | 2:26.21 | 2025 York Invitational | 2025-11-15 |
| 200m IM | 2:42.54 | OUA & Club Winter Invitational | 2026-01-17 |
| 400m Freestyle | 5:21.69 | 2025 York Invitational | 2025-11-15 |
| 400m IM | 6:08.63 | MAC Jingle Bell | 2025-12-12 |
| 50m Backstroke | 35.60 | Border City Invitational 2025 | 2025-12-05 |
| 50m Breaststroke | 37.80 | 2025 Downtown Sprint Meet | 2025-10-25 |
| 50m Butterfly | 32.63 | OUA & Club Winter Invitational | 2026-01-17 |
| 50m Freestyle | 29.01 | 2025 York Invitational | 2025-11-15 |
Ma, Harrison's top personal bests include 100m Backstroke (1:15.58), 100m Breaststroke (1:21.41), 100m Butterfly (1:13.24), 100m Freestyle (1:03.63), 200m Breaststroke (3:10.51).
Ma, Harrison swims for Toronto Swim Club.
Ma, Harrison has competed in 8 meets.