Women's 400m Freestyle - Heat 1
dimanche 7 août 2016, 17h28 GMT – 22h28 GMT
| Nom | Temps | |
|---|---|---|
| 1 |  Chihiro Igarashi | 4′ 7.52″ |
| 2 |  Joanna Evans | + 0.08″ |
| 3 | Katarina Simonovic | + 8.05″ |
| 4 | Kristel Kobrich | + 8.55″ |
| 5 | Valerie Gruest Slowing | + 12.059″ |
| 6 | Lani Cabrera | + 21.43″ |
| 7 | Gabriella Doueihy | + 23.69″ |
| 8 | Rebeca Quinteros Ortiz | + 44.59″ |