Hydrological Unit: Narragansett Bay-Frontal Rhode Island Sound
| HUC | Name |
|---|---|
| 010900040901 | Seekonk River-Providence River |
| 010900040902 | Old Mill Creek-Narragansett Bay |
| 010900040903 | Greenwich Bay |
| 010900040904 | Hunt River |
| 010900040905 | Mount Hope Bay |
| 010900040906 | Upper West Passage |
| 010900040907 | Upper East Passage |
| 010900040908 | Lower West Passage |
| 010900040909 | Lower East Passage |
| 010900040910 | Sakonnet River |
| 010900040911 | Aquidneck Island-Frontal Atlantic Ocean |
| 010900040912 | Pettaquamscutt River-Frontal Atlantic Ocean |