Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
613355
| MA | Essex | Haverhill; Merrimack River around Stanley Island. | 1979 |
01070006
| Merrimack River | established |
873633
| MA | Essex | Kenoza at sampling station C | 1991 |
01070006
| Merrimack River | established |
873550
| MA | Essex | Kenoza at sampling station G | 1991 |
01070006
| Merrimack River | established |
34979
| MA | Essex | Merrimack River around Stanley Island, Haverhill | 1979 |
01070006
| Merrimack River | established |
35014
| MA | Essex | Shawsheen River at Rt. 93, Tewksbury | 1980 |
01070006
| Merrimack River | established |
613356
| MA | Essex | Tewksbury; Shawsheen River at Rt. 93. | 1980 |
01070006
| Merrimack River | established |
1673645
| MA | Middlesex | [No locality description provided] | 2020 |
01070006
| Merrimack River | |
34949
| MA | Middlesex | Long Pond, Tewksbury | 1961 |
01070006
| Merrimack River | established |
613365
| MA | Middlesex | Long Pond, Tewksbury | 1961 |
01070006
| Merrimack River | established |
34965
| MA | Middlesex | Shawsheen River at Strongwater Creek | 1962 |
01070006
| Merrimack River | established |
613366
| MA | Middlesex | Shawsheen River at Strongwater Creek. [VERBATIM DEPTH:to 4'] | 1962 |
01070006
| Merrimack River | established |