Sub-locations
| Name | Sites | Samples |
|---|---|---|
| Barnstable County | 35 | 99 |
| Berkshire County | 7 | 17 |
| Bristol County | 39 | 124 |
| Dukes County | 21 | 79 |
| Essex County | 24 | 73 |
| Franklin County | 11 | 30 |
| Hampden County | 11 | 31 |
| Hampshire County | 0 | 0 |
| Middlesex County | 39 | 97 |
| Nantucket County | 17 | 40 |
| Norfolk County | 33 | 83 |
| Plymouth County | 52 | 200 |
| Suffolk County | 16 | 64 |
| Worcester County | 36 | 93 |