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| HUC | Name |
|---|---|
| 0109000101 | Plum Island Sound |
| 0109000102 | Ipswich River |
| 0109000103 | Essex River-Frontal Ipswich Bay |
| 0109000104 | Saugus River |
| 0109000105 | Mystic River |
| 0109000106 | Upper Charles River |
| 0109000107 | Lower Charles River |
| 0109000108 | Neponset River |
| 0109000109 | Hingham Bay |
| 0109000110 | Boston Harbor-Massachusetts Bay |
