Specimen ID | Common Name | State | County | Locality | Year |
| Drainage name | Status |
234147
| monoecious hydrilla | MA | Barnstable | Long Pond, Centerville, Barnstable | 2001 |
01090002
| Cape Cod | established |
877707
| monoecious hydrilla | MA | Barnstable | Mystic Lake | 2010 |
01090002
| Cape Cod | established |
1633923
| hydrilla | MA | Hampden | Connecticut River at Threemile Brook | 2018 |
01080205
| Lower Connecticut | established |
1633924
| hydrilla | MA | Hampden | Connecticut River, downstream of Threemile Brook | 2018 |
01080205
| Lower Connecticut | established |
877709
| monoecious hydrilla | MA | Middlesex | Small backyard pond in Weston, MA | 2010 |
01090001
| Charles | established |
1546956
| monoecious hydrilla | MA | Middlesex | superfund site north of Woburn, west of Reading | 2019 |
01090001
| Charles | established |
258001
| monoecious hydrilla | MA | Plymouth | Hobomock Pond | 2008 |
01090002
| Cape Cod | established |
877708
| monoecious hydrilla | MA | Plymouth | Three small ponds in Duxbury and Marshfield | 2009 |
01090002
| Cape Cod | established |
1340414
| monoecious hydrilla | MA | Worcester | South Meadow Pond, Clinton | 2010 |
01070004
| Nashua | established |
1634131
| monoecious hydrilla | MA | Worcester | South Meadow Pond, Clinton | 2010 |
01070004
| Nashua | established |