Sub-locations
| Name | Sites | Samples |
|---|---|---|
| Aitkin County | 6 | 11 |
| Anoka County | 3 | 9 |
| Becker County | 2 | 8 |
| Beltrami County | 10 | 19 |
| Benton County | 1 | 3 |
| Big Stone County | 1 | 1 |
| Blue Earth County | 5 | 34 |
| Brown County | 1 | 2 |
| Carver County | 6 | 30 |
| Cass County | 20 | 67 |
| Chippewa County | 3 | 5 |
| Chisago County | 1 | 1 |
| Clay County | 1 | 1 |
| Clearwater County | 0 | 0 |
| Cook County | 3 | 7 |
| Cottonwood County | 2 | 7 |
| Crow Wing County | 7 | 20 |
| Dakota County | 2 | 3 |
| Dodge County | 1 | 1 |
| Douglas County | 3 | 5 |
| Faribault County | 3 | 13 |
| Fillmore County | 1 | 3 |
| Goodhue County | 7 | 68 |
| Hennepin County | 12 | 29 |
| Houston County | 3 | 7 |