Sub-locations
| Name | Sites | Samples |
|---|---|---|
| Barnstable County | 35 | 116 |
| Berkshire County | 7 | 22 |
| Bristol County | 39 | 126 |
| Dukes County | 21 | 81 |
| Essex County | 24 | 83 |
| Franklin County | 11 | 33 |
| Hampden County | 11 | 38 |
| Hampshire County | 0 | 0 |
| Middlesex County | 39 | 104 |
| Nantucket County | 17 | 54 |
| Norfolk County | 33 | 92 |
| Plymouth County | 52 | 221 |
| Suffolk County | 16 | 70 |
| Worcester County | 36 | 94 |