Water Quality
Water Quality > Tributary and Waterfront Data > New York City Waterfront > Randall’s Island- Bronx Kill, west landing

Randall’s Island- Bronx Kill, west landing

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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

118 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 246 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/19/2019 10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/12/2019 41 Acceptable 0.0 0.0 0.0 0.0 0.0
09/05/2019 63 Beach Advisory 0.0 0.0 0.0 0.3 0.3
08/29/2019 20 Acceptable 0.0 0.1 0.0 0.0 0.1
08/22/2019 <10 Acceptable 0.0 0.1 0.0 0.0 0.1
08/15/2019 86 Beach Advisory 0.0 0.0 0.1 0.0 0.1
08/08/2019 223 Beach Advisory 0.2 1.2 0.0 0.0 1.4
08/01/2019 12997 Beach Advisory 0.0 0.4 0.0 0.0 0.4
07/18/2019 >24196 Beach Advisory 0.5 1.8 0.0 0.0 2.3
07/11/2019 120 Beach Advisory 0.8 0.0 0.0 0.0 0.8
06/20/2019 173 Beach Advisory 0.0 0.1 0.7 0.0 0.8
06/13/2019 1092 Beach Advisory 0.0 0.0 0.5 0.6 1.1
06/06/2019 393 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/30/2019 2851 Beach Advisory 0.0 0.8 0.2 0.0 1.0
05/23/2019 301 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/04/2018 1396 Beach Advisory 0.0 0.0 0.7 0.0 0.7
09/27/2018 5247 Beach Advisory 0.0 0.2 2.0 0.0 2.2
09/20/2018 201 Beach Advisory 0.0 0.0 1.2 0.0 1.2
09/13/2018 1961 Beach Advisory 0.1 0.2 0.0 0.9 1.2
09/06/2018 122 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/30/2018 122 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/23/2018 2282 Beach Advisory 0.0 0.7 0.1 0.0 0.8
08/16/2018 2282 Beach Advisory 0.0 0.8 0.7 0.0 1.5
08/09/2018 1222 Beach Advisory 0.6 0.0 0.3 0.0 0.9
08/02/2018 840 Beach Advisory 0.0 0.1 0.0 0.4 0.5
07/26/2018 407 Beach Advisory 0.0 0.7 0.0 0.2 0.9
07/19/2018 >24196 Beach Advisory 0.0 0.0 2.2 0.0 2.2
07/12/2018 633 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 2046 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/21/2018 10462 Beach Advisory 0.0 0.1 0.1 0.1 0.2
06/14/2018 459 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/31/2018 20 Acceptable 0.0 0.0 0.0 0.0 0.0
05/24/2018 20 Acceptable 0.0 0.3 0.3 0.0 0.6
09/28/2017 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/21/2017 52 Acceptable 0.0 0.0 0.2 0.0 0.2
09/14/2017 85 Beach Advisory 0.0 0.1 0.0 0.0 0.1
08/31/2017 85 Beach Advisory 0.0 0.0 0.1 0.0 0.1
08/24/2017 146 Beach Advisory 0.0 0.0 0.3 0.0 0.3
08/17/2017 131 Beach Advisory 0.0 0.0 0.5 0.0 0.5
07/27/2017 336 Beach Advisory 0.0 0.0 0.0 0.7 0.7
07/20/2017 771 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/13/2017 2987 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/06/2017 41 Acceptable 0.0 0.0 0.0 0.5 0.5
06/29/2017 132 Beach Advisory 0.0 0.0 0.2 0.0 0.2
06/22/2017 2064 Beach Advisory 0.0 0.0 0.0 1.4 1.4
06/15/2017 305 Beach Advisory 0.0 0.3 0.0 0.0 0.3
06/08/2017 72 Beach Advisory 0.0 0.0 0.1 0.0 0.1
06/01/2017 1723 Beach Advisory 0.0 0.0 0.1 0.1 0.2
05/25/2017 85 Beach Advisory 0.2 0.0 0.0 0.6 0.8
05/18/2017 1106 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/29/2016 135 Beach Advisory 0.0 0.0 0.2 0.0 0.2
09/22/2016 199 Beach Advisory 0.0 0.0 0.0 0.7 0.7
09/15/2016 62 Beach Advisory 0.0 0.6 0.0 0.0 0.6
09/08/2016 226 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 41 Acceptable 0.0 0.0 0.0 0.0 0.0
08/18/2016 63 Beach Advisory 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 231 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/28/2016 657 Beach Advisory 0.0 0.0 0.0 1.0 1.0
07/21/2016 146 Beach Advisory 0.0 0.0 0.0 0.4 0.4
07/14/2016 4611 Beach Advisory 0.6 0.0 0.0 0.0 0.6
07/07/2016 448 Beach Advisory 0.0 0.0 0.7 0.5 1.2
06/30/2016 1624 Beach Advisory 0.0 0.0 0.1 0.5 0.6
06/23/2016 31 Acceptable 0.0 0.0 0.0 0.0 0.0
06/16/2016 52 Acceptable 0.2 0.0 0.0 0.0 0.2
06/09/2016 173 Beach Advisory 0.0 0.5 0.0 0.0 0.5
06/02/2016 487 Beach Advisory 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 52 Acceptable 0.0 0.0 0.0 0.0 0.0
10/01/2015 17329 Beach Advisory 0.1 1.3 0.1 0.0 1.5
09/24/2015 10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/17/2015 74 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/10/2015 >24196 Beach Advisory 1.6 0.0 0.0 0.0 1.6
09/03/2015 10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/27/2015 31 Acceptable 0.0 0.0 0.0 0.0 0.0
08/13/2015 52 Acceptable 0.0 0.0 1.2 0.0 1.2
08/06/2015 31 Acceptable 0.0 0.0 0.4 0.0 0.4
07/30/2015 41 Acceptable 2.0 0.0 0.0 0.4 2.3
07/23/2015 305 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/16/2015 512 Beach Advisory 0.0 0.1 0.4 0.0 0.5
07/09/2015 <10 Acceptable 0.3 0.0 0.1 0.0 0.4
07/01/2015 1607 Beach Advisory 0.4 0.0 0.0 0.3 0.7
06/25/2015 272 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/18/2015 1076 Beach Advisory 0.0 0.0 0.3 0.6 0.8
06/11/2015 460 Beach Advisory 0.0 0.0 0.0 0.1 0.1
06/04/2015 1376 Beach Advisory 0.0 0.0 0.4 0.7 1.1
05/28/2015 201 Beach Advisory 0.0 0.1 0.0 0.0 0.1
05/21/2015 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/02/2014 528 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/25/2014 122 Beach Advisory 0.3 0.0 0.0 0.0 0.3
08/28/2014 63 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/21/2014 20 Acceptable 0.4 0.0 0.0 0.0 0.4
08/14/2014 110 Beach Advisory 0.0 0.5 0.2 0.0 0.7
08/07/2014 98 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/31/2014 228 Beach Advisory 0.0 0.0 0.0 0.2 0.2
07/24/2014 1223 Beach Advisory 0.0 0.2 0.0 0.0 0.2
07/17/2014 1274 Beach Advisory 0.0 0.0 1.3 0.5 1.8
07/10/2014 63 Beach Advisory 0.0 0.1 0.4 0.0 0.5
07/02/2014 31 Acceptable 1.0 0.0 0.0 0.0 1.0
06/26/2014 63 Beach Advisory 0.1 0.1 0.0 0.0 0.2
06/19/2014 317 Beach Advisory 0.2 0.0 0.0 0.0 0.2
06/12/2014 63 Beach Advisory 0.1 0.0 0.0 1.6 1.7
06/05/2014 >24196 Beach Advisory 0.9 0.0 0.1 0.0 1.0
05/29/2014 233 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/27/2012 3784 Beach Advisory 0.1 0.0 0.0 0.0 0.1
09/13/2012 63 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/06/2012 120 Beach Advisory 0.0 0.1 0.1 0.0 0.2
08/30/2012 63 Beach Advisory 0.0 0.0 0.1 0.6 0.8
08/23/2012 20 Acceptable 0.0 0.0 0.0 0.0 0.0
08/16/2012 2909 Beach Advisory 0.0 0.6 0.0 0.0 0.6
08/09/2012 41 Acceptable 0.0 0.0 0.0 0.0 0.0
08/02/2012 246 Beach Advisory 0.0 0.6 0.0 0.0 0.6
07/19/2012 4352 Beach Advisory 0.0 1.8 0.0 0.0 1.8
07/12/2012 203 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/05/2012 833 Beach Advisory 0.0 0.1 0.0 0.0 0.1

Entero Count (fecal indicator) and Rainfall Correlation

118 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

Agencies Responsible:

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

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