Water Quality
Water Quality > Tributary and Waterfront Data > New York City Waterfront > Randall’s Island- Little Hell Gate

Randall’s Island- Little Hell Gate

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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

73 Samples taken

Sample Date [i] Enterococcus Count
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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.

Quality Rain, day of (in) Prior Day 2 Days Prior 3 Days Prior Rain 4 Days Total Rain
Sort Sort Sort Sort Sort Sort Sort Sort
10/03/2019 1,439 Acceptable 0.0 0.0 0.0 0.0 0.0
09/19/2019 31 Acceptable 0.0 0.0 0.0 0.0 0.0
09/12/2019 4786 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/05/2019 216 Beach Advisory 0.0 0.0 0.0 0.3 0.3
08/29/2019 41 Acceptable 0.0 0.1 0.0 0.0 0.1
08/22/2019 41 Acceptable 0.0 0.1 0.0 0.0 0.1
08/15/2019 31 Acceptable 0.0 0.0 0.1 0.0 0.1
08/08/2019 886 Beach Advisory 0.2 1.2 0.0 0.0 1.4
08/01/2019 5172 Beach Advisory 0.0 0.4 0.0 0.0 0.4
07/18/2019 3,441 Acceptable 0.5 1.8 0.0 0.0 2.3
07/11/2019 520 Beach Advisory 0.8 0.0 0.0 0.0 0.8
06/20/2019 52 Acceptable 0.0 0.1 0.7 0.0 0.8
06/13/2019 880 Beach Advisory 0.0 0.0 0.5 0.6 1.1
06/06/2019 464 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/30/2019 1067 Beach Advisory 0.0 0.8 0.2 0.0 1.0
05/23/2019 588 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/04/2018 633 Beach Advisory 0.0 0.0 0.7 0.0 0.7
09/27/2018 1993 Beach Advisory 0.0 0.2 2.0 0.0 2.2
09/20/2018 63 Beach Advisory 0.0 0.0 1.2 0.0 1.2
09/13/2018 3026 Beach Advisory 0.1 0.2 0.0 0.9 1.2
09/06/2018 74 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/30/2018 40 Acceptable 0.0 0.0 0.0 0.0 0.0
08/23/2018 1090 Beach Advisory 0.0 0.7 0.1 0.0 0.8
08/16/2018 1090 Beach Advisory 0.0 0.8 0.7 0.0 1.5
08/09/2018 1679 Beach Advisory 0.6 0.0 0.3 0.0 0.9
08/02/2018 714 Beach Advisory 0.0 0.1 0.0 0.4 0.5
07/26/2018 75 Beach Advisory 0.0 0.7 0.0 0.2 0.9
07/19/2018 835 Beach Advisory 0.0 0.0 2.2 0.0 2.2
07/12/2018 1017 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/05/2018 74 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/28/2018 1650 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/21/2018 5794 Beach Advisory 0.0 0.1 0.1 0.1 0.2
06/14/2018 63 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/07/2018 Acceptable 0.0 0.0 0.0 0.2 0.2
05/31/2018 31 Acceptable 0.0 0.0 0.0 0.0 0.0
05/24/2018 30 Acceptable 0.0 0.3 0.3 0.0 0.6
09/28/2017 63 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/21/2017 20 Acceptable 0.0 0.0 0.2 0.0 0.2
09/14/2017 122 Beach Advisory 0.0 0.1 0.0 0.0 0.1
08/31/2017 95 Beach Advisory 0.0 0.0 0.1 0.0 0.1
08/24/2017 253 Beach Advisory 0.0 0.0 0.3 0.0 0.3
08/17/2017 63 Beach Advisory 0.0 0.0 0.5 0.0 0.5
07/27/2017 74 Beach Advisory 0.0 0.0 0.0 0.7 0.7
07/20/2017 41 Acceptable 0.0 0.0 0.0 0.0 0.0
07/13/2017 63 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/06/2017 30 Acceptable 0.0 0.0 0.0 0.5 0.5
06/29/2017 468 Beach Advisory 0.0 0.0 0.2 0.0 0.2
06/22/2017 1723 Beach Advisory 0.0 0.0 0.0 1.4 1.4
06/15/2017 737 Beach Advisory 0.0 0.3 0.0 0.0 0.3
06/08/2017 85 Beach Advisory 0.0 0.0 0.1 0.0 0.1
06/01/2017 63 Beach Advisory 0.0 0.0 0.1 0.1 0.2
05/25/2017 86 Beach Advisory 0.2 0.0 0.0 0.6 0.8
05/18/2017 401 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/29/2016 75 Beach Advisory 0.0 0.0 0.2 0.0 0.2
09/22/2016 10 Acceptable 0.0 0.0 0.0 0.7 0.7
09/15/2016 74 Beach Advisory 0.0 0.6 0.0 0.0 0.6
09/08/2016 98 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/01/2016 <10 Acceptable 0.5 0.0 0.0 0.0 0.5
08/25/2016 20 Acceptable 0.0 0.0 0.0 0.0 0.0
08/18/2016 10 Acceptable 0.0 0.0 0.1 0.0 0.2
08/11/2016 <10 Acceptable 0.2 0.1 0.0 0.0 0.2
08/04/2016 670 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/28/2016 74 Beach Advisory 0.0 0.0 0.0 1.0 1.0
07/21/2016 10 Acceptable 0.0 0.0 0.0 0.4 0.4
07/14/2016 31 Acceptable 0.6 0.0 0.0 0.0 0.6
07/07/2016 10 Acceptable 0.0 0.0 0.7 0.5 1.2
06/30/2016 74 Beach Advisory 0.0 0.0 0.1 0.5 0.6
06/23/2016 20 Acceptable 0.0 0.0 0.0 0.0 0.0
06/16/2016 98 Beach Advisory 0.2 0.0 0.0 0.0 0.2
06/09/2016 266 Beach Advisory 0.0 0.5 0.0 0.0 0.5
06/02/2016 10 Acceptable 0.0 0.0 0.0 1.7 1.7
05/26/2016 <10 Acceptable 0.0 0.0 0.2 0.0 0.2
05/19/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0

Entero Count (fecal indicator) and Rainfall Correlation

73 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 wunderground.com. 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 is no longer actively sampled.

Agencies Responsible:

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

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