| Rank | Athlete | Year | Rounds | Strokes | Average |
| 1 | Ann Schnell | 2003-04 | 10 | 59 | 5.90 |
| 2 | Ann Schnell | 2001-02 | 11 | 72 | 6.55 |
| 3 | Lesley Stracks | 1993-94 | 7 | 46 | 6.57 |
| 4 | Sayde Murray | 2005-06 | 10 | 66 | 6.60 |
| 5 | Misha Harvey | 2005-06 | 8 | 59 | 7.38 |
| 6 | Tiffany Maurycy | 1989-90 | 7 | 52 | 7.43 |
| 7 | Lindsey Sims | 2002-03 | 11 | 84 | 7.64 |
| 8 | Erika Oldenkamp | 2005-06 | 10 | 77 | 7.70 |
| 9 | Lindsey Sims | 1999-00 | 10 | 78 | 7.80 |
| 10 | Ann Schnell | 2000-01 | 11 | 86 | 7.82 |