| Time | Date | Name | Meet |
|---|---|---|---|
| 1:30.72 | Feb. 18, 2023 | Colson, Yuen, Fitzgerald, Adl | Midwest Conference Championships |
| 1:32.16 | Jan. 21, 2023 | Adl, Yuen, Fitzgerald, Colson | Grinnell Invitational |
| 1:32.36 | Feb. 19, 2022 | Fitzgerald, Wilhelm, Yuen, Feilmeyer | Midwest Conference Championships |
| 1:33.08 | Feb. 16, 2013 | Brus, Ringdahl-Mayland, Spooner, Fulgoni | Midwest Conference Championships |
| 1:34.25 | Feb. 18, 2012 | Brus, Ringdahl-Mayland, Cote, Fulgoni | Midwest Conference Championships |
| 1:34.69 | Feb. 19, 2011 | Brus, Mistry, Spooner, Fulgoni | Midwest Conference Championships |
| 1:39.07 | Jan. 22, 2011 | Brus, Mistry, Spooner, Fulgoni | Grinnell Invitational |
| 1:39.74 | Dec. 4, 2010 | Brus, Mistry, Kaiser-Nyman | Pioneer (Grinnell) Invitational |
| 1:41.28 | Jan. 15, 2010 | Olson, Mistry, Schoelz, Fulgoni | Grinnell Invitational |
| 1:41.81 | Jan. 15, 2009 | Grinnell Invitational |
