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Important for you to know:

  • New to WDFN: see current water conditions throughout the state using the new State Pages. Filter by continuous data type and age of data, view latest values, and link to graphing options to explore the data further. To learn more, read our announcement on the Water Data for the Nation blog.

Hydrological Unit: Nissequogue River-Frontal Long Island Sound

HUC Name
020302010301 Town of Crab Meadow-Frontal Long Island Sound
020302010302 Nissequogue River-Frontal Long Island Sound
020302010303 West Meadow Creek-Frontal Smithtown Bay
020302010304 Mount Sinai Harbor-Frontal Long Island Sound