| Final | Team | time | L | | 1. Kathleen Ellis | USA | 1:07.6 | 6 | | 2. Mary Stewart | CAN | 1:08.9 | 5 | | 3. Kim Worley | USA | 1:11.6 | 7 | | 4. Silvia Belmar | MEX | 1:17.9 | 3 | | 5. Sharon Pierce | CAN | 1:17.0 | 4 | | 6. Esther Capriles | VEN | 1:17.7 | 9 | | 7. Adela Castillejo | MEX | 1:18.0 | 2 | | 8. Ana Lallande | PUR | 1:20.2 | 8 |
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| Heat 1 | Team | time | Rk. | | 1. Mary Stewart | CAN | 1:09.1 | 1. | | 2. Kim Worley | USA | 1:15.5 | 4. | | 3. Silvia Belmar | MEX | 1:15.8 | 5. | | 4. Esther Capriles | VEN | 1:18.6 | 8. | | 5. Ceci Goncalves | BRA | 1:20.9 | 11. | | 6. Maria Lidia Lecot | ARG | 1:23.8 | 12. |
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| Heat 2 | Team | time | Rk. | | 1. Kathleen Ellis | USA | 1:09.9 | 2. | | 2. Sharon Pierce | CAN | 1:15.0 | 3. | | 3. Ana Lallande | PUR | 1:17.7 | 6. | | 4. Adela Castillejo | MEX | 1:17.9 | 7. | | 5. El. Souza Mota | BRA | 1:18.7 | 9. | | 6. Alberta Marchetti | ARG | 1:20.1 | 10. |
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