| | Final 21:49 | time | gap | L | pts | _______ | | 1. |  Australia | 7:37.50 | WR | 5 | 1011 | | | | Mollie O'Callaghan 1:53.66, Shayna Jack 3:49.29, Brianna Throssell 5:45.09, Ariarne Titmus 7:37.50 | | 2. |  United States | 7:41.38 | +3.88s | 4 | 986 | | | | Erin Gemmell 1:55.97, Katie Ledecky 3:50.36, Bella Sims 5:45.00, Alex Shackell 7:41.38 | | 3. |  China | 7:44.40 | +6.90s | 6 | 967 | | | | Bingjie Li 1:55.83, Jiaping Li 3:53.37, Yanhan Ai 5:48.94, Yaxin Liu 7:44.40 | | 4. |  Great Britain | 7:46.63 | +9.13s | 3 | 953 | | | | Freya Constance Colbert 1:56.16, Lucy Hope 3:53.48, Abbie Wood 5:50.33, Freya Anderson 7:46.63 | | 5. |  Canada | 7:49.98 | +12.48s | 7 | 933 | | | | Mary-Sophie Harvey 1:58.50, Summer Mcintosh 3:52.47, Emma O'Croinin 5:51.71, Brooklyn Douthwright 7:49.98 | | 6. |  Netherlands | 7:52.93 | +15.43s | 2 | 915 | | | | Janna Van Kooten 1:58.17, Imani De Jong 3:57.77, Silke Holkenborg 5:57.46, Marrit Steenbergen 7:52.93 | | 7. |  Hungary | 7:54.65 | +17.15s | 1 | 906 | | | | Nikolett Padar 1:56.74, Lilla Minna Abraham 3:56.04, Dora Molnar 5:55.20, Ajna Kesely 7:54.65 | | 8. |  Brazil | 7:59.10 | +21.60s | 8 | 881 | | | | Stephanie Balduccini 2:01.05, Maria Fernanda De Oliveira 4:00.06, Gabrielle Roncatto 5:59.28, Nathalia Siqueira Almeida 7:59.10 |
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Heats - Thursday, 27th July 11:52 | | Best 8 times advanced to Final. |
| | Heat 2 12:01 | time | gap | L | pts | _______ | | 1. | Australia | 7:47.84 | +1.48s | 4 | 946 | 2. | | | Madison Wilson 1:57.06, Lani Pallister 3:53.89, Brianna Throssell 5:50.20, Kiah Melverton 7:47.84 | | 2. | Netherlands | 7:53.52 | +7.16s | 3 | 912 | 5. | | | Janna Van Kooten 1:58.48, Imani De Jong 3:57.83, Silke Holkenborg 5:57.25, Marrit Steenbergen 7:53.52 | | 3. | Canada | 7:54.73 | +8.37s | 5 | 905 | 6. | | | Ella Christina Jansen 1:59.53, Emma O'Croinin 3:57.63, Brooklyn Douthwright 5:55.88, Katerine Savard 7:54.73 | | 4. | Hungary | 7:55.26 | +8.90s | 6 | 902 | 7. | | | Lilla Minna Abraham 1:59.12, Nikolett Padar 3:56.95, Ajna Kesely 5:55.73, Dora Molnar 7:55.26 | | 5. |  Japan | 7:57.22 | +10.86s | 2 | 891 | 9. | | | Rio Shirai 1:58.80, Nagisa Ikemoto 3:57.13, Chihiro Igarashi 5:57.07, Kinuko Mochizuki 7:57.22 | | 6. |  New Zealand | 8:00.11 | +13.75s | 7 | 875 | 11. | | | Erika Fairweather 1:57.02, Eve Thomas 3:56.82, Summer Osborne 5:59.63, Caitlin Deans 6:00.11 | | 7. |  South Korea | 8:05.40 | +19.04s | 8 | 847 | 15. | | | Seoyeong KIM 1:59.87, Yeonkyung HUR 3:59.25, Dakyung HAN 6:02.35, Sujin Park 6:05.40 | | 8. |  Austria | 8:05.77 | +19.41s | 1 | 845 | 16. | | | Lena Kreundl 2:01.69, Marlene Kahler 4:02.38, Cornelia Pammer 6:03.22, Lena Opatril 6:05.77 | | 9. |  Belgium | 8:06.94 | +20.58s | 9 | 839 | 17. | | | Valentine Dumont 1:58.92, Fleur Verdonck 4:00.12, Lotte Vanhauwaert 6:02.44, Lana Ravelingien 6:06.94 | | 10. |  Turkey | 8:10.76 | +24.40s | 0 | 819 | 18. | | | Deniz Ertan 2:03.03, Merve Tuncel 4:04.06, Ecem Donmez 6:06.84, Ela Naz Ozdemir 6:10.76 |
| | Heat 1 11:52 | time | gap | L | pts | _______ | | 1. | United States | 7:46.36 | | 4 | 955 | 1. | | | Leah Smith 1:57.78, Erin Gemmell 3:53.43, Alex Shackell 5:49.48, Anna Peplowski 7:46.36 | | 2. | Great Britain | 7:51.13 | +4.77s | 3 | 926 | 3. | | | Freya Constance Colbert 1:57.35, Abbie Wood 3:55.07, Medi Eira Harris 5:53.81, Lucy Hope 7:51.13 | | 3. | China | 7:51.55 | +5.19s | 5 | 924 | 4. | | | Yanhan Ai 1:56.97, Peiqi Yang 3:56.04, Chutong Ge 5:54.25, Jiaping Li 7:51.55 | | 4. | Brazil | 7:56.14 | +9.78s | 6 | 897 | 8. | | | Stephanie Balduccini 1:59.83, Maria Fernanda De Oliveira 3:57.96, Gabrielle Roncatto 5:57.08, Nathalia Siqueira Almeida 7:56.14 | | 5. |  Israel | 7:59.02 | +12.66s | 1 | 881 | 10. | | | Anastasia Gorbenko 1:28.11, Daria Golovaty 3:57.54, Ayla Spitz 5:58.34, Lea Polonsky 7:59.02 | | 6. |  Italy | 8:00.13 | +13.77s | 2 | 875 | 12. | | | Sofia Morini 1:59.36, Costanza Cocconcelli 4:00.06, Sara Franceschi 5:59.36, Emma Virginia Menicucci 6:00.13 | | 7. |  Germany | 8:00.48 | +14.12s | 7 | 873 | 13. | | | Isabel Gose 1:58.71, Leonie Marlen Kullmann 3:59.55, Nele Schulze 6:00.68, Nina Holt 6:00.48 | | 8. |  Spain | 8:03.62 | +17.26s | 8 | 856 | 14. | | | Carla Carron 2:01.28, Ainhoa Campabadal Amezcua 4:02.52, Alba Herrero Lazaro 6:02.96, Paula Juste Sanchez 6:03.62 | | -. |  Mexico | DNS | | 0 | | |
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