Sub-locations
| Name | Sites | Samples |
|---|---|---|
| Manitowoc County | 0 | 0 |
| Marathon County | 1 | 2 |
| Marinette County | 1 | 1 |
| Marquette County | 1 | 1 |
| Menominee County | 2 | 4 |
| Milwaukee County | 0 | 0 |
| Monroe County | 7 | 13 |
| Oconto County | 4 | 19 |
| Oneida County | 9 | 17 |
| Outagamie County | 4 | 7 |
| Ozaukee County | 3 | 6 |
| Pepin County | 0 | 0 |
| Pierce County | 4 | 25 |
| Polk County | 1 | 4 |
| Portage County | 11 | 54 |
| Richland County | 8 | 15 |
| Rock County | 3 | 4 |
| Sauk County | 3 | 7 |
| Shawano County | 1 | 0 |
| Sheboygan County | 2 | 10 |
| Taylor County | 0 | 0 |
| Trempealeau County | 6 | 17 |
| Vernon County | 6 | 20 |
| Vilas County | 4 | 4 |
| Walworth County | 1 | 4 |