Sub-locations
| Name | Sites | Samples |
|---|---|---|
| Adams County | 1 | 1 |
| Barron County | 1 | 1 |
| Bayfield County | 4 | 11 |
| Buffalo County | 3 | 12 |
| Burnett County | 6 | 17 |
| Calumet County | 2 | 4 |
| Clark County | 1 | 0 |
| Crawford County | 14 | 41 |
| Dane County | 11 | 58 |
| Dodge County | 6 | 9 |
| Door County | 13 | 55 |
| Dunn County | 0 | 0 |
| Fond du Lac County | 1 | 7 |
| Forest County | 10 | 37 |
| Grant County | 9 | 48 |
| Green Lake County | 3 | 8 |
| Iowa County | 4 | 40 |
| Jackson County | 1 | 3 |
| Jefferson County | 12 | 159 |
| Juneau County | 3 | 4 |
| Kenosha County | 6 | 49 |
| La Crosse County | 21 | 146 |
| Lafayette County | 1 | 7 |
| Langlade County | 0 | 0 |
| Lincoln County | 1 | 1 |