The women's 4 × 100 metre freestyle relay competition at the 2010 Pan Pacific Swimming Championships took place on August 20 at the William Woollett Jr. Aquatics Center.2010 Pan Pacific handbook The last champion was the United States.ISHOF list with all medalists in Pan Pacific Championships history

This race consisted of eight lengths of the pool. Each of the four swimmers completed two lengths of the pool. The first swimmer had to touch the wall before the second could leave the starting block.

Records Prior to this competition, the existing world and Pan Pacific records were as follows: World recordInge Dekker (53.61)Ranomi Kromowidjojo (52.30)Femke Heemskerk (53.03)Marleen Veldhuis (52.78)3:31.72Rome, ItalyJuly 26, 2009Pan Pacific Championships recordAmanda Weir (53.76)Natalie Coughlin (53.21)Kara Lynn Joyce (54.54)Lacey Nymeyer (54.29)3:35.80Victoria, CanadaAugust 19, 2006

Results All times are in minutes and seconds.

KEY:qFastest non-qualifiersQQualifiedCRChampionships recordNRNational recordPBPersonal bestSBSeasonal best

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

Final The final was held on August 20, at 20:06. Rank Lane Name Nationality Time Notes 5 Natalie Coughlin (54.25) Jessica Hardy (53.43) Amanda Weir (53.85) Dana Vollmer (53.58) 3:35.11 CR 4 Yolane Kukla (55.51) Emily Seebohm (53.86) Alicia Coutts (54.34) Felicity Galvez (54.35) 3:38.06 2 Victoria Poon (54.46) Julia Wilkinson (54.60) Erica Morningstar (54.73) Genevieve Saumur (54.35) 3:38.14 4 3 Haruka Ueda (54.70) Yayoi Matsumoto (54.44) Tomoko Hagiwara (54.94) Hanae Ito (54.78) 3:38.86 5 6 Hayley Palmer (56.28) Tash Hind (54.97) Amaka Gessler (55.30) Penny Marshall (55.60) 3:42.15

References