| Final | Team | time | L | Rk. | 50m | 100m | 150m | | 1. Joanna Maranhao | BRA | 2:13.22 | 4 | 1. | 30.38s | 1:03.57 | 1:38.51 | | 2. Andreina Pinto | VEN | 2:15.52 | 5 | 2. | 31.10s | 1:05.64 | 1:40.97 | | 3. Georgina Bardach | ARG | 2:17.31 | 3 | 3. | 31.33s | 1:05.22 | 1:41.10 | | 4. Eliana Barrios | VEN | 2:19.61 | 7 | 6. | 31.05s | 1:06.67 | 1:43.01 | | 5. Jessica Maria Camposano Rios | COL | 2:21.37 | 2 | 5. | 31.45s | 1:06.09 | 1:44.11 | | 6. Karen Nicole Antonini | ARG | 2:25.01 | 8 | 8. | 31.81s | 1:09.41 | 1:46.77 | | 7. Daiene Dias | BRA | 2:26.22 | 6 | 4. | 31.30s | 1:06.65 | 1:44.20 | | -. Antonella Scanavino | URU | DQ | 1 | 7. | | | |
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| Heat 1 | Team | time | L | Rk. | 50m | 100m | 150m | | 1. Andreina Pinto | VEN | 2:18.07 | 5 | 2. | 31.22s | 1:06.67 | 1:42.14 | | 2. Daiene Dias | BRA | 2:21.92 | 4 | 4. | 31.43s | 1:06.50 | 1:43.85 | | 3. Jessica Maria Camposano Rios | COL | 2:22.18 | 3 | 5. | 31.81s | 1:06.78 | 1:44.82 | | 4. Carolina Munoz Restrepo | COL | 2:26.70 | 6 | 9. | 31.40s | 1:08.45 | 1:46.73 | | 5. Ximena Elisabeth Andrada Espinol | ECU | 2:26.80 | 2 | 10. | 32.63s | 1:08.22 | 1:47.07 | | 6. Karlene Van Der Jagt | SUR | 2:46.09 | 7 | 12. | 34.78s | 1:16.67 | 1:59.39 |
| Heat 2 | Team | time | L | Rk. | 50m | 100m | 150m | | 1. Joanna Maranhao | BRA | 2:16.33 | 4 | 1. | 31.71s | 1:06.01 | 1:41.46 | | 2. Georgina Bardach | ARG | 2:20.52 | 5 | 3. | 32.07s | 1:07.59 | 1:43.80 | | 3. Eliana Barrios | VEN | 2:22.25 | 6 | 6. | 31.58s | 1:07.89 | 1:44.41 | | 4. Antonella Scanavino | URU | 2:22.73 | 2 | 7. | 32.51s | 1:08.75 | 1:46.31 | | 5. Karen Nicole Antonini | ARG | 2:22.88 | 3 | 8. | 33.34s | 1:10.04 | 1:46.30 | | 6. Daniela Reyes | CHI | 2:34.50 | 7 | 11. | 33.22s | 1:12.49 | 1:52.27 |
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