| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Huang, Eleanor Z (9)
|
MRRFAC |
|
45.55 |
- |
| 2 |
Hernandez, Lety S (10)
|
MRMHH |
46.99 |
45.77 |
-1.22 |
| 3 |
Delatorre, Ashley (10)
|
MRMHH |
50.12 |
46.68 |
-3.44 |
| 4 |
Ruiz, Beverly C (10)
|
MRMHH |
49.35 |
47.01 |
-2.34 |
| 5 |
Aguilar Perez, Vanessa (10)
|
MRMHH |
46.69 |
53.61 |
6.92 |
| 6 |
Hernandez, Laila A (8)
|
MRMHH |
57.98 |
55.18 |
-2.80 |
| 7 |
Celli, Annapia P (9)
|
MRMHH |
58.88 |
57.52 |
-1.36 |
| 8 |
Cruz Santos, Yaeli (10)
|
MRMHH |
58.46 |
58.09 |
-0.37 |
| 9 |
Guzman, Sofia (8)
|
MRMHH |
1:25.25 |
1:13.62 |
-11.63 |
|
Cabrera-Zavala, Allison (7)
|
MRMHH |
1:25.30 |
DQ |
- |
|
Romero, Miranda A (8)
|
MRMHH |
1:25.30 |
DQ |
- |