Web Tools

This Long Island Sound Partnership Compound Flood Hazard Web Map Application presents individual and combined flood hazard scores from rainfall, coastal storm surge and shallow or emerging groundwater on a 900-meter by 900-meter grid over a study area which encompasses New York City, and Long Island, and Long Island Sound Watersheds in Southeastern New York and Southern Connecticut.

This geonarrative represents a compilation of fishways, and their associated characteristics, collected by the Atlantic States Marine Fisheries Commission (ASMFC) member states at the request of the U.S. Geological Survey (USGS).

This interactive web application displays U.S. Geological Survey (USGS) data-collection locations in the Long Island Sound watershed. Station types include water-quality sampling sites, streamgages, groundwater-level and tidal monitoring sites, and meteorological sites. The sites shown on this map were active data-collection locations from May 2022 to May 2023.

This dashboard application displays nitrogen concentrations and loads in selected Long Island Sound tributaries.

The U.S. Geological Survey collects long-term hydrologic data and conducts scientific research within Long Island Sound and its watershed. This geonarrative summarizes the history, features and the ecological and societal importance of the Long Island Sound and its watershed. It also discusses the ongoing challenges that threaten the Sound’s environmental health.

View recent and historical chloride and specific conductance data for active water-quality monitoring stations on streams in Connecticut, Massachusetts, and Rhode Island.