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Harbor Water Sampling Data

DEP collects and analyzes data from a total of 70 sampling stations harborwide to monitor water conditions and understand how water quality can be improved.

Most Recent Harbor Sampling Data Report

DEP collects harbor samples at stations throughout NYC waterways weekly from June through September, while October through May sampling occurs monthly. Interruptions in data availability may occur due to weather conditions. The most recent report shows results of tests for Dissolved Oxygen (DO), Fecal Coliform (FC), Enterococcus, and Secchi Transparency (for definitions see PDF below). The Site column in the weekly report indicates the location the sample was collected; the sampling stations map shows the location of each site.

Past Harbor Water Sampling

Harbor water sampling information is provided in spreadsheet format, downloadable by year. Complete year files contain all data collected by DEP for the entire year. YTD file contains only the four samples of the weekly file.

*Data subject to modest changes due to quality assurance process.

NYC Waterbody Advisory Program

During heavy rains or snow, New York City sewers can fill to capacity and are unable to carry the combined sanitary and storm sewage to the plants. When this occurs, the mix of excess storm water and untreated sewage flows directly into the City's waterways. DEP offfers realtime conditons of our waterways through the NYC Waterbody Advisory Program.

Beach Quality and Safety

The Health Department provides the latest water quality information for NYC beaches. Water quality conditions are analyzed on a regular basis and beaches are classified as either "Open for Swimming," "Under Advisory," or "Closed – Temporarily Restricted for Bathing." Access the latest water quality conditions through the link below or by calling 311.