| AQ | 2018 Additional Qualifier | 1:30.70 |
| Lane | Team | Squad | Seed |
|---|---|---|---|
| 4 | Royal Oak | A | 1:41.70 |
| 5 | Redford Thurston | A | 1:37.00 |
| 6 | Birmingham Seaholm | A | 1:38.00 |
| Lane | Team | Squad | Seed |
|---|---|---|---|
| 1 | Livonia Stevenson | A | 1:35.70 |
| 2 | Farmington | A | 1:32.10 |
| 3 | Detroit Renaissance | A | 1:31.00 |
| 4 | Oak Park | A | 1:30.14 |
| 5 | West Bloomfield | A | 1:29.49 |
| 6 | Detroit U-D Jesuit | A | DNS |
| 7 | Southfield Arts & Tech | A | 1:30.50 |
| 8 | Farmington Hills Harrison | A | 1:31.60 |
| 9 | Berkley | A | 1:33.10 |