Hydrological Unit: Merrimack
| HUC | Name |
|---|---|
| 01070001 | Pemigewasset |
| 01070002 | Winnipesaukee River |
| 01070003 | Contoocook |
| 01070004 | Nashua |
| 01070005 | Concord |
| 01070006 | Merrimack River |
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