Bronx River- Mouth

Physical/Chemical Data

Physical, chemical and biological properties of the surface water that are measured continuously while the patrol boat is underway.

Entero Count (fecal indicator) and Rainfall

27 Samples taken

Sample Date [i] Enterococcus Count

Entero Count

Enterococcus (“Entero”) is a fecal indicating bacterium that lives in the intestines of humans and other warm-blooded animals. It is the EPA preferred indicator for sewage contamination.

QualityRain, day of (in)Prior Day2 Days Prior3 Days Prior Rain4 Days Total Rain
10/09/201884Beach Advisory0.
09/19/2018452Beach Advisory0.
09/14/2018122Beach Advisory0.
06/25/201863Beach Advisory0.
05/30/201874Beach Advisory0.
10/09/2017399Beach Advisory0.
09/15/2017231Beach Advisory0.
08/09/201772Beach Advisory0.
07/25/2017>24196Beach Advisory0.
07/20/2017754Beach Advisory0.
06/26/2017341Beach Advisory0.
06/06/2017160Beach Advisory0.
11/03/2016105Beach Advisory0.
09/10/2016>24196Beach Advisory0.

Entero Count (fecal indicator) and Rainfall Correlation

27 Samples taken

Water Quality*

Acceptable (0–60) Beach Advisory (61+)

*Single sample thresholds;
Enterococcus count per 100mL

Prior Four Day Rainfall
(in inches)

Dry Weather (0–0.25) Wet Weather (0.25+)

Enterococcus is an EPA-approved fecal contamination indicator.

Samples taken by citizen scientists and processed at laboratories that aren't directly affiliated with Riverkeeper, using methods and study designs that are consistent with Riverkeeper's Hudson River and Citizen Testing programs.

Rainfall data comes from Wet weather is a common trigger of fecal contamination.

What do the Numbers Mean?

Water Quality scoring is based on the 2012 Recreational Water Quality Criteria from the US Environmental Protection Agency (EPA) for safe swimming. Learn More

About this location:

This site marks the point where the Bronx River meets the East River. It also experiences traffic from recreational boaters and kayakers. It is in the vicinity of a Combined Sewer Overflow (CSO) outfall just north in the east bank of the river.

Agencies Responsible:

NYCDEP: 212-639-9675; NYSDEC Region 2: 718-482-4933

Keep the Hudson River flowing!
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