Sub-locations
| Name | Sites | Samples |
|---|---|---|
| Sibley County | 1 | 1 |
| Stearns County | 1 | 2 |
| Stevens County | 1 | 4 |
| St. Louis County | 5 | 15 |
| Todd County | 1 | 2 |
| Traverse County | 2 | 7 |
| Wabasha County | 1 | 7 |
| Wadena County | 1 | 2 |
| Washington County | 2 | 2 |
| Watonwan County | 1 | 1 |
| Wilkin County | 1 | 1 |
| Winona County | 2 | 23 |
| Wright County | 1 | 2 |
| Yellow Medicine County | 1 | 4 |