2010 Pan Pacific Swimming Championships – Women's 4 × 100 metre medley relay

Women's 4 × 100 metre medley relay at the 2010 Pan Pacific Swimming Championships
Venue	William Woollett Jr. Aquatics Center
Dates	August 21, 2010 (heats & finals)
Winning time	3:55.23
Medalists
Natalie Coughlin, Rebecca Soni, Dana Vollmer and Jessica Hardy    United States   Emily Seebohm, Leisel Jones, Alicia Coutts and Yolane Kukla    Australia   Aya Terakawa, Satomi Suzuki, Yuka Kato and Haruka Ueda    Japan
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The women's 4 × 100 metre medley relay competition at the 2010 Pan Pacific Swimming Championships took place on August 21 at the William Woollett Jr. Aquatics Center. The last champion was the United States.

Prior to this competition, the existing world and Pan Pacific records were as follows:

All times are in minutes and seconds.

Heats weren't performed, as only four teams had entered.

The final was held on August 21, at 20:15.

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