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Important for you to know:

  • Water Data for the Nation is replacing NWISweb over the next 3 years. On Thursday, December 19th at 2 PM EST / 11 AM PST, join our Teams Live Event to learn more about the NWISweb decommission. Registration is required! Register for the event here.

Hydrological Unit: Merrimack

HUC Name
01070001 Pemigewasset
01070002 Winnipesaukee River
01070003 Contoocook
01070004 Nashua
01070005 Concord
01070006 Merrimack River