| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:43.98 | 2026 Dave Kensit Memorial SC Championship | 2026-02-06 |
| 100m Breaststroke | 2:04.72 | Border City Invitational 2025 | 2025-12-05 |
| 100m Butterfly | 1:47.71 | Border City Invitational 2025 | 2025-12-05 |
| 100m Freestyle | 1:21.45 | 2026 Dave Kensit Memorial SC Championship | 2026-02-06 |
| 100m IM | 1:46.42 | 2025-2026 SSAT Time Trial 1 | 2025-10-18 |
| 200m Freestyle | 2:57.47 | 2026 Dave Kensit Memorial SC Championship | 2026-02-06 |
| 200m IM | 3:47.92 | 2025-2026 SSAT Invitational - NEOR 1 | 2025-10-25 |
| 400m Freestyle | 6:38.21 | 2025 Dominique Bouchard Invitational Meet | 2025-11-14 |
| 50m Backstroke | 47.06 | 2026 Dave Kensit Memorial SC Championship | 2026-02-06 |
| 50m Breaststroke | 55.38 | 2026 Dave Kensit Memorial SC Championship | 2026-02-06 |
| 50m Butterfly | 43.42 | 2025-2026 SSAT Invitational - NEOR 1 | 2025-10-25 |
| 50m Freestyle | 34.88 | 2026 Dave Kensit Memorial SC Championship | 2026-02-06 |
Tanninen, Miia's top personal bests include 100m Backstroke (1:43.98), 100m Breaststroke (2:04.72), 100m Butterfly (1:47.71), 100m Freestyle (1:21.45), 100m IM (1:46.42).
Tanninen, Miia swims for Sault Surge Aquatic Team.
Tanninen, Miia has competed in 5 meets.