| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:09.93 | 2025 AUS #2 Invitational | 2025-11-08 |
| 100m Breaststroke | 1:20.95 | Amby Legere Invitational | 2026-01-24 |
| 100m Freestyle | 1:00.86 | East Coast Championships | 2025-07-10 |
| 100m Freestyle | 58.13 | 2025 AUS #2 Invitational | 2025-11-08 |
| 200m Backstroke | 2:24.31 | 2026 AUS Swimming Championships | 2026-02-13 |
| 200m Freestyle | 2:15.85 | East Coast Championships | 2025-07-10 |
| 200m Freestyle | 2:02.81 | 2026 AUS Swimming Championships | 2026-02-13 |
| 200m IM | 2:29.07 | Amby Legere Invitational | 2026-01-24 |
| 400m Freestyle | 4:57.39 | East Coast Championships | 2025-07-10 |
| 400m Freestyle | 4:22.71 | 2025 Kemp-Fry Invitational Swim Meet | 2025-11-28 |
| 50m Freestyle | 27.47 | East Coast Championships | 2025-07-10 |
| 800m Freestyle | 10:19.22 | East Coast Championships | 2025-07-10 |
| 800m Freestyle | 9:35.82 | 2025 AUS #2 Invitational | 2025-11-08 |
Zachary Nadeau's top personal bests include 100m Backstroke (1:09.93), 100m Breaststroke (1:20.95), 100m Freestyle (1:00.86), 100m Freestyle (58.13), 200m Backstroke (2:24.31).
Zachary Nadeau swims for University of New Brunswick.
Zachary Nadeau has competed in 5 meets.