| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:13.08 | 2025 NYAC Cup | 2025-11-14 |
| 100m Breaststroke | 1:30.13 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m Freestyle | 1:06.74 | Border City Invitational 2025 | 2025-12-05 |
| 200m Backstroke | 2:38.65 | 2025 NYAC Cup | 2025-11-14 |
| 200m Freestyle | 2:26.88 | 2025 NYAC Cup | 2025-11-14 |
| 200m IM | 2:48.53 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 400m Freestyle | 5:18.09 | Border City Invitational 2025 | 2025-12-05 |
| 50m Backstroke | 34.01 | 2025 NYAC Cup | 2025-11-14 |
| 50m Butterfly | 34.50 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 50m Freestyle | 31.27 | 2025 NYAC Cup | 2025-11-14 |
Williams, Arlo's top personal bests include 100m Backstroke (1:13.08), 100m Breaststroke (1:30.13), 100m Freestyle (1:06.74), 200m Backstroke (2:38.65), 200m Freestyle (2:26.88).
Williams, Arlo swims for Toronto Olympian Swim Team.
Williams, Arlo has competed in 5 meets.