| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Breaststroke | 1:15.90 | 2025 Age Group International SC | 2025-11-27 |
| 100m Freestyle | 1:03.32 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 1500m Freestyle | 2:03.90 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 200m Breaststroke | 2:45.35 | 2025 Age Group International SC | 2025-11-27 |
| 200m Butterfly | 2:49.72 | ESWIM January Time Trial | 2026-01-20 |
| 200m Freestyle | 2:16.40 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 200m IM | 2:29.47 | 2025 Age Group International SC | 2025-11-27 |
| 400m Freestyle | 4:48.19 | 2025 Age Group International SC | 2025-11-27 |
| 400m IM | 5:16.80 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 50m Breaststroke | 34.62 | 2025 Age Group International SC | 2025-11-27 |
| 50m Butterfly | 33.63 | Hall of Fame | 2025-10-18 |
| 50m Freestyle | 28.22 | 2025 Age Group International SC | 2025-11-27 |
| 800m Freestyle | 9:51.28 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
Diomis, George's top personal bests include 100m Breaststroke (1:15.90), 100m Freestyle (1:03.32), 1500m Freestyle (2:03.90), 200m Breaststroke (2:45.35), 200m Butterfly (2:49.72).
Diomis, George swims for Etobicoke Swim Club.
Diomis, George has competed in 11 meets.