| Lane | Swimmer | Team | Place | Time |
|---|---|---|---|---|
| 1 | 21 | DQ | ||
| 1 | 12 | 52.08 | ||
| 1 | 9 | 49.81 | ||
| 2 | 10 | 50.56 | ||
| 2 | 11 | 51.79 | ||
| 2 | 17 | 55.64 | ||
| 3 | 5 | 49.06 | ||
| 3 | 15 | 52.78 | ||
| 3 | 21 | NS | ||
| 4 | 4 | 48.87 | ||
| 4 | 20 | 58.59 | ||
| 4 | 1 | 43.70 | ||
| 5 | 21 | NS | ||
| 5 | 2 | 46.51 | ||
| 5 | 3 | 46.97 | ||
| 6 | 19 | 57.35 | ||
| 6 | 21 | NS | ||
| 6 | 6 | 49.20 | ||
| 7 | 7 | 49.22 | ||
| 7 | 14 | 52.72 | ||
| 7 | 8 | 49.76 | ||
| 8 | 13 | 52.48 | ||
| 8 | 16 | 53.09 | ||
| 8 | 18 | 56.10 |