| Lane | Team | Squad | Seed | 
|---|---|---|---|
| 3 | Joliet (West) | A | 44.98 | 
| 4 | Yorkville (H.S.) | A | 44.80 | 
| 5 | Joliet (Central) | A | 44.97 | 
| 6 | Aurora (West Aurora) | A | 46.50 | 
| Lane | Team | Squad | Seed | 
|---|---|---|---|
| 1 | Romeoville (H.S.) | A | 44.38 | 
| 2 | Oswego (East) | A | 44.08 | 
| 3 | Plainfield (South) | A | 43.56 | 
| 4 | Minooka | A | 42.02 | 
| 5 | Plainfield (North) | A | 42.59 | 
| 6 | Plainfield (East) | A | 43.91 | 
| 7 | Plainfield (Central) | A | 44.23 | 
| 8 | Oswego | A | 44.74 |