| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:45.06 | MAC Rising Star #1 | 2025-11-08 |
| 100m Breaststroke | 1:54.92 | June Performance Meet 2025 | 2025-06-06 |
| 100m Breaststroke | 1:40.55 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m Butterfly | 2:16.67 | June Performance Meet 2025 | 2025-06-06 |
| 100m Freestyle | 1:33.49 | June Performance Meet 2025 | 2025-06-06 |
| 100m Freestyle | 1:26.98 | MAC Rising Star #1 | 2025-11-08 |
| 100m IM | 1:43.15 | 2025 York Santa Meet | 2025-12-14 |
| 50m Backstroke | 48.51 | MAC Rising Star #1 | 2025-11-08 |
| 50m Breaststroke | 52.85 | June Performance Meet 2025 | 2025-06-06 |
| 50m Breaststroke | 49.10 | MAC Rising Star #1 | 2025-11-08 |
| 50m Butterfly | 55.73 | June Performance Meet 2025 | 2025-06-06 |
| 50m Freestyle | 42.25 | June Performance Meet 2025 | 2025-06-06 |
| 50m Freestyle | 38.77 | 2025 Red vs Black #1 | 2025-10-05 |
Lau, Ethan's top personal bests include 100m Backstroke (1:45.06), 100m Breaststroke (1:54.92), 100m Breaststroke (1:40.55), 100m Butterfly (2:16.67), 100m Freestyle (1:33.49).
Lau, Ethan swims for North York Aquatic Club.
Lau, Ethan has competed in 6 meets.