| 1) | Grigg, Kellie | UC Davis | 1:00.75 (05/11-05/12) | 1:01.08 (05/11-05/12) | 1:01.73 (04/27) | 1:02.00 (04/21) | 1:02.40 (04/12-04/14) | 1:04.09 (04/06-04/07) | 1:04.34 (03/10) | 1:05.22 (03/17) |
| 2) | Affeld, Laura | UNLV | 1:00.75 (05/09-05/12) | 1:01.09 (04/19-04/21) | 1:01.54 (04/13-04/14) | 1:01.69 (03/23-03/24) | 1:01.86 (05/09-05/12) | 1:02.16 (04/28-04/29) | 1:02.32 (03/02-03/03) |