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Important for you to know:

  • New to WDFN: customize and keep track of your list of favorite monitoring locations and data types using the new My Favorites page. To learn more, read our announcement on our Water Data for the Nation blog.

Hydrological Unit: Hammonasset River-Frontal Long Island Sound

HUC Name
011000040201 Menunketesuck River
011000040202 Hammonasset River-Frontal Clinton Harbor
011000040203 East River-Frontal Guilford Harbor
011000040204 West River-Frontal Guilford Harbor
011000040205 Branford River
011000040206 Farm River
011000040207 Patchogue River-Frontal Westbrook Harbor
011000040208 Indian River-Frontal Long Island Sound