| Final 18:10 | Team | time | L | Rk. | 50m | | 1. Fabiola Molina | BRA | 1:01.65 | 5 | 2. | 29.68s | | 2. Carolina Colorado Henao | COL | 1:02.77 | 4 | 1. | 31.20s | | 3. Jeserik Andreina Pinto | VEN | 1:04.21 | 6 | 4. | 30.92s | | 4. Fernanda Alvarenga | BRA | 1:04.73 | 3 | 3. | 32.20s | | 5. Erika Layne Stewardt | COL | 1:05.07 | 2 | 5. | 31.82s | | 6. Elimar Barrios | VEN | 1:05.31 | 7 | 6. | 31.73s | | 7. Massie Milagros Carrillo Yong | PER | 1:06.83 | 8 | 8. | 32.36s | | 8. Cecilia Bertoncello | ARG | 1:07.48 | 1 | 7. | 32.45s |
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| Heats - Monday 29.03 10:35 |
| Heat 1 | Team | time | L | Rk. | 50m | | 1. Fernanda Alvarenga | BRA | 1:05.14 | 4 | 32.00s | 3. | | 2. Jeserik Andreina Pinto | VEN | 1:05.28 | 5 | 31.22s | 4. | | 3. Massie Milagros Carrillo Yong | PER | 1:07.12 | 6 | 31.82s | 8. | | 4. Diana An Yu Chang Ibarra | ECU | 1:07.13 | 3 | 33.59s | 9. | | 5. Ines Remersaro | URU | 1:07.63 | 2 | 33.61s | 10. | | 6. Mariana Carbo Vaca Diez Zavalla | BOL | 1:12.89 | 7 | 34.96s | 15. |
| Heat 2 | Team | time | L | Rk. | 50m | | 1. Carolina Colorado Henao | COL | 1:03.17 | 4 | 31.25s | 1. | | 2. Elimar Barrios | VEN | 1:06.00 | 6 | 32.28s | 6. | | 3. Cecilia Bertoncello | ARG | 1:06.89 | 5 | 31.96s | 7. | | 4. Maria Laura Mongelos Britez | PAR | 1:07.95 | 2 | 33.09s | 12. | | 5. Nicole Maria Marmol Gilbert | ECU | 1:08.78 | 3 | 33.82s | 13. | | 6. Carolina Trewhela Pfeifer | CHI | 1:13.19 | 7 | 34.47s | 16. | | -. Naomi Korstanje | AHO | DNS | 1 | | |
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