| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:24.14 | UCSC February Invitational | 2026-02-21 |
| 100m Breaststroke | 1:24.47 | UCSC Fall Back Invitational | 2025-11-07 |
| 100m Butterfly | 1:30.71 | UCSC Fall Start Up | 2025-10-18 |
| 100m Freestyle | 1:11.97 | UCSC Fall Start Up | 2025-10-18 |
| 100m IM | 1:22.30 | UCSC February Invitational | 2026-02-21 |
| 200m Backstroke | 3:00.82 | UCSC February Invitational | 2026-02-21 |
| 200m Breaststroke | 3:11.21 | KCS 32nd MJB Law Classic SCM | 2025-12-12 |
| 200m Freestyle | 2:37.71 | UCSC Fall Back Invitational | 2025-11-07 |
| 200m IM | 3:00.72 | UCSC February Invitational | 2026-02-21 |
| 400m Freestyle | 5:59.52 | UCSC Grand Prix | 2026-01-30 |
| 50m Backstroke | 38.66 | KCS 32nd MJB Law Classic SCM | 2025-12-12 |
| 50m Breaststroke | 38.65 | KCS 32nd MJB Law Classic SCM | 2025-12-12 |
| 50m Butterfly | 36.12 | UCSC Grand Prix | 2026-01-30 |
| 50m Freestyle | 31.26 | UCSC TC1-Special | 2025-10-17 |
Balkwill, Nathan's top personal bests include 100m Backstroke (1:24.14), 100m Breaststroke (1:24.47), 100m Butterfly (1:30.71), 100m Freestyle (1:11.97), 100m IM (1:22.30).
Balkwill, Nathan swims for Calgary Swimming.
Balkwill, Nathan has competed in 6 meets.