| Time | Date | Name | Meet |
|---|---|---|---|
| 6:39.09 | Feb. 28, 2024 | Kvederis, Lanting, Luna, Johansen | Western Athletic Conference Championships |
| 6:39.79 | Feb. 21, 2018 | Crossen, Goguen, Zenteno, Roderick | Western Athletic Conference Championships |
| 6:40.48 | Feb. 15, 2012 | Longbotham, Morrell, Wertz, Mendez-Beck | Mountain Pacific Sports Federation Championships |
| 6:42.98 | Feb. 23, 2011 | Longbotham, Morrell, Wertz, Gilmore | Mountain Pacific Sports Federation Championships |
| 6:48.32 | Feb. 10, 2010 | Longbotham, Gilmore, Martinez, Wertz | Pacific Collegiate Swim Conference Championships |
| 6:52.68 | March 14, 2008 | Smith, Jiracek, Bevers, Coley | NCAA Division II Championships |
| 6:52.83 | March 16, 2007 | Smith, Bevers, Freeman, Coley | NCAA Division II Championships |
| 6:57.82 | March 10, 2006 | Smith, Bevers, Freeman, Coley | NCAA Division II Championships |
