| Final 18:20 | Team | time | L | Rk. | 50m | | 1. Agustina De Giovanni | ARG | 1:10.00 | 4 | 1. | 32.88s | | 2. Tatiane Sakemi | BRA | 1:12.47 | 5 | 2. | 33.54s | | 3. Carolina Mussi | BRA | 1:12.78 | 3 | 3. | 34.58s | | 4. Monica Lorena Alvarez Rincon | COL | 1:12.86 | 1 | 7. | 34.29s | | 5. Daniela Victoria | VEN | 1:14.79 | 7 | 6. | 33.83s | | 6. Mercedes Toledo | VEN | 1:15.10 | 6 | 4. | 34.79s | | 7. Mijal Asis | ARG | 1:15.78 | 2 | 5. | 36.60s | | 8. Ashley Bransford | ARU | 1:18.17 | 8 | 8. | 35.45s |
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| Heats - Monday 29.03 10:54 |
| Heat 1 | Team | time | L | Rk. | 50m | | 1. Tatiane Sakemi | BRA | 1:12.87 | 4 | 2. | 34.16s | | 2. Mijal Asis | ARG | 1:16.07 | 5 | 5. | 36.01s | | 3. Monica Lorena Alvarez Rincon | COL | 1:16.95 | 3 | 7. | 35.98s | | 4. Laura Catherine Galarza Ramirez | COL | 1:19.16 | 6 | 9. | 36.25s | | 5. Patricia Mariana Quevedo San Martin | PER | 1:20.62 | 7 | 11. | 37.61s | | 6. Raysa Malu Gonzales Ruiz | PER | 1:20.93 | 2 | 12. | 38.10s | | 7. Carla Silvana Bastidas Torres | ECU | 1:21.54 | 1 | 13. | 38.40s | | 8. Nilshaira Isenia | AHO | 1:22.10 | 8 | 14. | 37.59s |
| Heat 2 | Team | time | L | Rk. | 50m | | 1. Agustina De Giovanni | ARG | 1:10.37 | 5 | 1. | 33.37s | | 2. Carolina Mussi | BRA | 1:13.17 | 4 | 3. | 34.60s | | 3. Mercedes Toledo | VEN | 1:14.87 | 2 | 4. | 35.39s | | 4. Daniela Victoria | VEN | 1:16.66 | 3 | 6. | 36.21s | | 5. Ashley Bransford | ARU | 1:18.65 | 6 | 8. | 35.68s | | 6. Camila Isabel Najera Espinosa | ECU | 1:20.17 | 7 | 10. | 36.90s | | 7. Lujan Amarilla Vargas | PAR | 1:23.59 | 8 | 15. | 37.64s | | 8. Maria Laura Mongelos Britez | PAR | 1:27.68 | 1 | 16. | 41.90s |
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