Hydrological Unit: Sudbury River
| HUC | Name |
|---|---|
| 010700050101 | Headwaters Sudbury River |
| 010700050102 | Sudbury Reservoir-Sudbury River |
| 010700050103 | Lake Cochituate-Sudbury River |
| 010700050104 | Hop Brook-Sudbury River |
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