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Important for you to know:

  • New to WDFN: explore current and historic water data available in your area of interest and filter to find monitoring locations that collect the water data you need through Explore USGS Water Data. To learn more, read our announcement on the Water Data for the Nation blog.

Hydrological Unit: Merrimack

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