East River mid-channel at 23rd Street

East River at Roosevelt Island

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

68 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.

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
10/13/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/14/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/15/2016 <10 Acceptable 0.0 0.1 0.0 0.3 0.4
07/13/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/15/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/20/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/12/2015 <10 Acceptable 0.0 0.0 0.0 0.9 0.9
09/11/2015 86 Beach Advisory 0.0 1.6 0.0 0.0 1.6
08/12/2015 62 Beach Advisory 0.0 1.2 0.0 0.0 1.2
07/08/2015 <10 Acceptable 0.0 0.1 0.0 0.0 0.1
06/11/2015 <10 Acceptable 0.0 0.0 0.0 0.1 0.1
05/12/2015 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/13/2014 <10 Acceptable 0.0 0.0 0.3 0.0 0.3
09/07/2014 10 Acceptable 0.0 0.1 0.0 0.0 0.1
08/11/2014 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/07/2014 <10 Acceptable 0.0 0.0 0.0 0.1 0.1
06/12/2014 <10 Acceptable 0.0 0.0 0.0 1.6 1.6
05/12/2014 10 Acceptable 0.0 0.0 0.4 0.0 0.4
10/16/2013 10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/18/2013 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/14/2013 199 Beach Advisory 0.0 0.9 0.1 0.0 1.0
07/17/2013 10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/19/2013 10 Acceptable 0.0 0.2 0.0 0.0 0.2
05/31/2013 <10 Acceptable 0.0 0.0 0.0 0.5 0.5
11/08/2012 121 Beach Advisory 0.1 1.1 0.0 0.0 1.2
10/10/2012 31 Acceptable 0.3 0.0 0.0 0.2 0.5
09/10/2012 <10 Acceptable 0.0 0.0 0.4 0.0 0.4
08/13/2012 <10 Acceptable 0.0 0.0 0.0 0.2 0.2
07/16/2012 <10 Acceptable 0.0 0.3 0.0 0.0 0.3
06/11/2012 10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/15/2012 <10 Acceptable 0.5 0.0 0.0 0.0 0.5
10/21/2011 41 Acceptable 0.0 0.0 1.1 0.0 1.1
09/14/2011 20 Acceptable 0.0 0.0 0.0 0.0 0.0
08/16/2011 98 Beach Advisory 0.0 0.6 5.8 0.0 6.4
07/19/2011 <10 Acceptable 0.0 0.1 0.0 0.0 0.1
06/27/2011 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/16/2011 160 Beach Advisory 0.2 0.9 0.0 0.0 1.1
10/12/2010 399 Beach Advisory 0.1 1.1 0.0 0.0 1.2
09/11/2010 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/17/2010 31 Acceptable 0.0 0.1 0.2 0.0 0.3
07/21/2010 <10 Acceptable 0.0 0.0 0.1 0.0 0.1
06/15/2010 <10 Acceptable 0.0 0.0 0.3 0.0 0.3
06/03/2010 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/21/2010 10 Acceptable 0.0 0.0 0.0 1.1 1.1
10/29/2009 20 Acceptable 0.0 1.3 0.6 0.0 1.9
10/19/2009 <10 Acceptable 0.0 0.3 0.0 0.1 0.4
10/09/2009 <10 Acceptable 0.0 0.0 0.2 0.0 0.2
09/14/2009 <10 Acceptable 0.0 0.0 0.0 0.8 0.8
08/20/2009 <10 Acceptable 0.0 0.0 0.6 0.0 0.6
07/28/2009 10 Acceptable 0.0 0.6 1.4 0.0 2.0
06/22/2009 52 Acceptable 0.0 0.4 0.3 0.0 0.7
06/05/2009 31 Acceptable 0.9 0.5 0.5 0.1 2.0
05/12/2009 10 Acceptable 0.0 0.0 0.0 0.6 0.6
10/20/2008 10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/24/2008 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/19/2008 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/23/2008 140 Beach Advisory 1.0 0.0 0.0 0.0 1.0
07/14/2008 90 Beach Advisory 0.5 0.0 0.0 0.0 0.5
07/02/2008 <10 Acceptable 0.0 0.0 0.0 0.6 0.6
06/24/2008 52 Acceptable 0.0 0.1 0.1 0.0 0.2
05/19/2008 <10 Acceptable 0.0 0.1 0.0 0.9 1.0
09/06/2007 1 Acceptable 0.0 0.0 0.0 0.0 0.0
08/16/2007 4 Acceptable 0.0 0.0 0.0 0.0 0.0
07/11/2007 1 Acceptable 0.0 0.0 0.0 0.0 0.0
06/18/2007 6 Acceptable 0.0 0.0 0.0 0.0 0.0
05/23/2007 5 Acceptable 0.0 0.0 0.0 0.0 0.0
05/17/2007 109 Beach Advisory 0.0 0.8 0.0 0.0 0.8
04/18/2007 376 Beach Advisory 0.0 0.0 0.9 7.6 8.5

Entero Count (fecal indicator) and Rainfall Correlation

68 Samples taken

All Water Quality Parameters

68 Samples taken

Sample Date [i] Entero 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.

Quality [i] Temp (f)

Temperature

Hudson River water temperature changes seasonally. Surface water temperature can change on small scales in the river reflecting natural and human influences.

[i] Salinity

Salinity

Estuaries like the Hudson are where freshwaters in rivers meet the sea. Salinity tells us about the relative contribution of fresh and salt water within a particular region of the estuary. 

[i] Chlorophyll

Chlorophyll

A measure of the amount of microscopic algae present in the water. High chlorophyll counts can mean high levels of the nutrients phosphorus and nitrogen, and the threat, or presence, of algae blooms.

[i] Turbidity

Turbidity

Turbidity is a measure of the amount of fine particles suspended in the water. As turbidity rises, light penetration, a key factor for aquatic plants and algae, diminishes.

[i] Oxygen

Oxygen

Oxygen concentrations in the water are closely connected to biological activities. Surface waters are typically in equilibrium with the atmosphere such that the oxygen concentration near the surface is close to fully saturated (100%).

Sort Sort Sort Sort Sort Sort Sort Sort
10/13/2016 <10 Acceptable
09/14/2016 <10 Acceptable 75.1 24.5 5.2 n/a 78.3
08/15/2016 <10 Acceptable 77.6 23.9 5 24.7 76.3
07/13/2016 <10 Acceptable 73.3 23.1 2.4 8.8 69.1
06/15/2016 <10 Acceptable 62.7 22.5 3.1 16.1 88.8
05/20/2016 <10 Acceptable 55.3 22.4 5 n/a 92.4
10/12/2015 <10 Acceptable 65 24.8 2.1 14 80
09/11/2015 86 Beach Advisory 76.4 25.4 4.6 7 64
08/12/2015 62 Beach Advisory 74.2 24.9 2.6 8 70
07/08/2015 <10 Acceptable 71.1 22.5 2.5 14 66
06/11/2015 <10 Acceptable 64.7 21.6 1.8 1 72
05/12/2015 <10 Acceptable 56.5 23 5 13 91
10/13/2014 <10 Acceptable 64.9 24.5 1.7 12 74
09/07/2014 10 Acceptable 75.9 24.1 2.5 8 59
08/11/2014 <10 Acceptable 75.5 22.7 1.6 14 66
07/07/2014 <10 Acceptable 71.3 20.3 4 5 75
06/12/2014 <10 Acceptable 64.1 21.8 3.8 13 80
05/12/2014 10 Acceptable 53.9 20.1 2.1 50 88
10/16/2013 10 Acceptable 65.6 24.7 1.5 4 80
09/18/2013 <10 Acceptable 69.9 25.7 2.5 13 69
08/14/2013 199 Beach Advisory 73 23.8 1.6 20 55
07/17/2013 10 Acceptable 74.5 22.5 3.2 15 69
06/19/2013 10 Acceptable 67.3 19.7 2.4 9 73
05/31/2013 <10 Acceptable 62.3 22.2 1.4 9 75
11/08/2012 121 Beach Advisory 53.1 20.1 1.8 8 87
10/10/2012 31 Acceptable 67.2 24.5 1.9 8 66
09/10/2012 <10 Acceptable 76.8 24.3 2.6 34 56
08/13/2012 <10 Acceptable 78.4 33.4 0.9 5 53
07/16/2012 <10 Acceptable 75.1 32.6 1.9 8 57
06/11/2012 10 Acceptable 68.5 22.1 1.7 n/a 65
05/15/2012 <10 Acceptable 59.1 21.4 1.6 11 79
10/21/2011 41 Acceptable 64.3 19.5 0.6 14 77
09/14/2011 20 Acceptable 71.5 13.7 1.5 24 74
08/16/2011 98 Beach Advisory 74 22.9 1 18 60
07/19/2011 <10 Acceptable 79.6 21.8 15.1 5 95
06/27/2011 <10 Acceptable 71 19.3 1.6 8 59
05/16/2011 160 Beach Advisory 55.5 19.1 4.5 160 83
10/12/2010 399 Beach Advisory 65.9 19.7 1.7 15 73
09/11/2010 <10 Acceptable 70.8 26.8 3.6 13 74
08/17/2010 31 Acceptable 76.4 26.3 2 6 46
07/21/2010 <10 Acceptable 77.8 25.4 2.6 4 53
06/15/2010 <10 Acceptable 65.9 23.3 0.5 15 68
06/03/2010 <10 Acceptable n/a n/a n/a n/a n/a
05/21/2010 10 Acceptable 56.8 23.7 2.5 9 77
10/29/2009 20 Acceptable n/a n/a n/a n/a n/a
10/19/2009 <10 Acceptable 57.3 25.3 1.1 5 81
10/09/2009 <10 Acceptable n/a n/a n/a n/a n/a
09/14/2009 <10 Acceptable 71.3 24.5 0.9 37 65
08/20/2009 <10 Acceptable 77.5 21.9 1.9 19 60
07/28/2009 10 Acceptable 73 22.8 1 10 49
06/22/2009 52 Acceptable 67.2 16.2 0.6 19 68
06/05/2009 31 Acceptable n/a n/a n/a n/a n/a
05/12/2009 10 Acceptable 57.3 19.3 1.3 12 78
10/20/2008 10 Acceptable 62.1 25.5 1 6 73
09/24/2008 <10 Acceptable 70.6 24.8 5.8 7 87
08/19/2008 <10 Acceptable 73.1 23 1.2 10 67
07/23/2008 140 Beach Advisory 73.5 24.9 1.3 13 60
07/14/2008 90 Beach Advisory 69.6 23 n/a n/a 68
07/02/2008 <10 Acceptable 68.6 24.4 1.1 10 55
06/24/2008 52 Acceptable 68.9 23.2 1 6 67
05/19/2008 <10 Acceptable 57 21.8 0.9 11 83
09/06/2007 1 Acceptable 74.1 25.4 1.7 9 60
08/16/2007 4 Acceptable 75.7 24.5 1.2 17 60
07/11/2007 1 Acceptable 70 24.9 1.1 9 54
06/18/2007 6 Acceptable n/a n/a n/a n/a n/a
05/23/2007 5 Acceptable 60.2 20.9 1 13 80
05/17/2007 109 Beach Advisory 59.1 20.8 1.3 56 80
04/18/2007 376 Beach Advisory 46.3 2.8 0.2 19 100

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 Riverkeeper, Lamont-Doherty Earth Observatory and CUNY Queens College staff, and processed on the Riverkeeper vessel, according to the 2014 Quality Assurance Project Plan.

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:

Brooklyn, NY
The deep water sampling site around 23rd St. has mostly transitory boat traffic.

The data displayed on these pages relates to the levels of sewage indicating microbes. Even though the levels on a single days can fall within acceptable levels for Enterococcus, these locations are not necessarily acceptable for swimming. Other water quality parameters not reported on this web site such as chemical contamination and floatables should cause users to exercise caution at this site.

Agencies Responsible:

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

2017 Fishermen's Ball
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