Hydrological Unit: Ramapo River
| HUC | Name |
|---|---|
| 020301030201 | Upper Ramapo River |
| 020301030202 | Stony Brook |
| 020301030203 | Mahwah River |
| 020301030204 | Middle Ramapo River |
| 020301030205 | Lower Ramapo River |
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