| Final 18:32 | Team | time | L | Rk. | 50m | | 1. Daynara Paula | BRA | 1:00.44 | 4 | 1. | 27.98s | | 2. Carolina Colorado Henao | COL | 1:01.21 | 5 | 2. | 29.18s | | 3. Daiene Dias | BRA | 1:01.27 | 3 | 3. | 29.20s | | 4. Elimar Barrios | VEN | 1:02.77 | 6 | 4. | 29.29s | | 5. Eliana Barrios | VEN | 1:03.27 | 2 | 5. | 30.08s | | 6. Loren Yamile Bahamonde Cabello | ECU | 1:03.81 | 1 | 7. | 30.24s | | 7. Maria Clara Quintero Sosa | COL | 1:04.37 | 7 | 6. | 29.79s | | 8. Manuela Morano | ARG | 1:04.91 | 8 | 8. | 30.02s |
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| Heats - Friday 26.03 10:49 |
| Heat 1 | Team | time | L | Rk. | 50m | | 1. Carolina Colorado Henao | COL | 1:01.34 | 4 | 2. | 29.10s | | 2. Eliana Barrios | VEN | 1:03.72 | 5 | 5. | 29.79s | | 3. Karen Nicole Antonini | ARG | 1:05.81 | 3 | 9. | 31.05s | | 4. Daniela Reyes | CHI | 1:07.76 | 6 | 12. | 31.44s | | -. Josefina Bailac Meneses | CHI | DNS | 2 | | |
| Heat 2 | Team | time | L | Rk. | 50m | | 1. Daiene Dias | BRA | 1:02.75 | 4 | 3. | 29.64s | | 2. Loren Yamile Bahamonde Cabello | ECU | 1:04.02 | 5 | 7. | 30.28s | | 3. Manuela Morano | ARG | 1:04.75 | 3 | 8. | 30.85s | | 4. Maria Graciela Wong Rosales | PER | 1:06.91 | 6 | 11. | 30.69s | | 5. Carolina Alejandra Aguilar Muro | PER | 1:10.03 | 2 | 14. | 32.77s | | -. Naomi Korstanje | AHO | DNS | 7 | | |
| Heat 3 | Team | time | L | Rk. | 50m | | 1. Daynara Paula | BRA | 1:01.11 | 4 | 1. | 28.33s | | 2. Elimar Barrios | VEN | 1:03.32 | 5 | 4. | 29.39s | | 3. Maria Clara Quintero Sosa | COL | 1:03.87 | 3 | 6. | 29.94s | | 4. Ximena Elisabeth Andrada Espinol | ECU | 1:06.49 | 6 | 10. | 30.33s | | 5. Karen Milenka Torrez Guzman | BOL | 1:08.55 | 2 | 13. | 31.71s | | -. Chinyere Pigot | SUR | | 7 | | |
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