79th Street midchannel

79th street midchannel

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

77 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
SortSortSortSortSortSortSortSort
10/15/2017<10Acceptable0.00.10.00.10.2
09/10/201710Acceptable0.00.00.00.00.0
08/13/2017<10Acceptable0.00.10.00.00.1
07/09/2017<10Acceptable0.00.01.80.01.8
06/11/2017<10Acceptable0.00.00.00.00.0
05/14/2017<10Acceptable0.01.60.00.01.6
04/04/201720Acceptable1.20.00.00.01.2
10/12/2016<10Acceptable0.00.00.00.60.6
09/13/2016<10Acceptable0.00.00.00.00.0
08/14/2016<10Acceptable0.00.00.30.20.5
07/12/2016<10Acceptable0.00.00.00.50.5
06/14/2016<10Acceptable0.00.00.00.00.0
05/19/2016<10Acceptable0.00.00.00.00.0
10/11/201510Acceptable0.00.00.90.00.9
09/10/201597Beach Advisory1.60.00.00.01.6
08/11/201552Acceptable1.20.00.00.01.2
07/07/2015<10Acceptable0.00.00.00.00.0
06/10/2015<10Acceptable0.00.00.10.00.1
05/11/2015<10Acceptable0.00.00.00.00.0
10/12/2014<10Acceptable0.00.30.00.00.3
09/07/2014<10Acceptable0.00.10.00.00.1
08/11/2014<10Acceptable0.00.00.00.00.0
07/07/2014<10Acceptable0.00.00.00.10.1
06/12/2014<10Acceptable0.00.00.01.61.6
05/12/201441Acceptable0.00.00.40.00.4
10/16/2013<10Acceptable0.00.00.00.00.0
09/18/201310Acceptable0.00.00.00.00.0
08/14/201310Acceptable0.00.90.10.01.0
07/17/2013<10Acceptable0.00.00.00.00.0
06/19/201310Acceptable0.00.20.00.00.2
05/31/2013<10Acceptable0.00.00.00.50.5
11/08/201241Acceptable0.11.10.00.01.2
10/10/201210Acceptable0.30.00.00.20.5
09/10/2012<10Acceptable0.00.00.40.00.4
08/13/2012<10Acceptable0.00.00.00.20.2
07/16/2012<10Acceptable0.00.30.00.00.3
06/11/201220Acceptable0.00.00.00.00.0
05/15/201286Beach Advisory0.50.00.00.00.5
10/21/201151Acceptable0.00.01.10.01.1
09/14/201141Acceptable0.00.00.00.00.0
08/16/201120Acceptable0.00.65.80.06.4
07/25/2011<10Acceptable0.00.00.00.00.0
07/22/201141Acceptable0.00.00.00.00.0
07/21/2011161Beach Advisory0.00.00.00.10.1
07/19/2011<10Acceptable0.00.10.00.00.1
06/27/201110Acceptable0.00.00.00.00.0
05/16/201174Beach Advisory0.20.90.00.01.1
10/12/2010161Beach Advisory0.11.10.00.01.2
09/11/2010<10Acceptable0.00.00.00.00.0
08/17/2010<10Acceptable0.00.10.20.00.3
07/21/2010<10Acceptable0.00.00.10.00.1
06/15/201020Acceptable0.00.00.30.00.3
05/21/2010<10Acceptable0.00.00.01.11.1
10/19/200931Acceptable0.00.30.00.10.4
09/14/200920Acceptable0.00.00.00.80.8
08/20/200910Acceptable0.00.00.60.00.6
07/28/2009<10Acceptable0.00.61.40.02.0
07/26/2009<10Acceptable1.40.00.00.41.8
07/25/200910Acceptable0.00.00.40.00.4
06/22/2009<10Acceptable0.00.50.30.00.8
06/06/200920Acceptable0.00.90.50.51.9
05/12/200910Acceptable0.00.00.00.60.6
10/20/2008<10Acceptable0.00.00.00.00.0
09/24/200810Acceptable0.00.00.00.00.0
08/19/2008<10Acceptable0.00.00.00.00.0
07/14/200826Acceptable0.50.00.00.00.5
07/02/2008<10Acceptable0.00.00.00.60.6
05/19/200810Acceptable0.00.10.00.91.0
09/06/20072Acceptable0.00.00.00.00.0
08/16/20076Acceptable0.00.00.00.00.0
07/11/20071032Beach Advisory1.00.00.00.01.0
06/18/20071Acceptable0.00.00.00.00.0
05/23/20073Acceptable0.00.00.00.00.0
04/18/2007205Beach Advisory0.00.00.97.68.5
11/10/2006143Beach Advisory0.00.03.60.03.6
10/18/200630Acceptable0.01.10.00.01.1
09/26/2006<10Acceptable0.00.00.00.10.1

Entero Count (fecal indicator) and Rainfall Correlation

77 Samples taken

All Water Quality Parameters

77 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%).

SortSortSortSortSortSortSortSort
10/15/2017<10Acceptable69.816.62.39.478.5
09/10/201710Acceptable70.620.43.98.483
08/13/2017<10Acceptable7617.832971.2
07/09/2017<10Acceptable76.08.73.78.9101.2
06/11/2017<10Acceptable68.88.4213.189.9
05/14/2017<10Acceptable59.53.71.819.396.4
04/04/201720Acceptable42.04.41.827.299.7
10/12/2016<10Acceptable65.416.63.23290
09/13/2016<10Acceptable7715.117.6n/a119
08/14/2016<10Acceptable82.912.736.423165
07/12/2016<10Acceptable77.611.38.91098
06/14/2016<10Acceptable69.67.73.42299
05/19/2016<10Acceptable59.89.31.8n/a98
10/11/201510Acceptable65.819.13.11286
09/10/201597Beach Advisory77.818.37.51177
08/11/201552Acceptable75.220.93.41176
07/07/2015<10Acceptable76.412.53.11985
06/10/2015<10Acceptable69.3122.7987
05/11/2015<10Acceptable60.216.64.61496
10/12/2014<10Acceptable64.922.21.7880
09/07/2014<10Acceptable77.313.83.91477
08/11/2014<10Acceptable771512375
07/07/2014<10Acceptable769.36.11099
06/12/2014<10Acceptable67.1122525112
05/12/201441Acceptable59.65.72.42799
10/16/2013<10Acceptable65.221.12.11583
09/18/201310Acceptable69.119.92.41477
08/14/201310Acceptable75.314.253286
07/17/2013<10Acceptable81.48.410.847100
06/19/201310Acceptable70.83.73.72095
05/31/2013<10Acceptable66.973.76292
11/08/201241Acceptable519.30.91791
10/10/201210Acceptable65.610.26.21390
09/10/2012<10Acceptable76.513.56.66088
08/13/2012<10Acceptable82.214.97.99118
07/16/2012<10Acceptable81.414.910.483119
06/11/201220Acceptable70.810.84.3n/a83
05/15/201286Beach Advisory61.65.42.52295
10/21/201151Acceptable624.91.53090
09/14/201141Acceptable723.31.67280
08/16/201120Acceptable7814.42.32475
07/25/2011<10Acceptable825.725.89166
07/22/201141Acceptable82.312.713.79n/a
07/21/2011161Beach Advisoryn/an/an/an/an/a
07/19/2011<10Acceptable80.113.84.11190
06/27/201110Acceptable76.13.98.35093
05/16/201174Beach Advisory588.839287
10/12/2010161Beach Advisory66.59.84.61385
09/11/2010<10Acceptable73.122.313.81890
08/17/2010<10Acceptable79.115.93.6871
07/21/2010<10Acceptable82.113.569.213135
06/15/201020Acceptable7117.532075
05/21/2010<10Acceptable62.611.82.51990
10/19/200931Acceptable57.215.9n/an/a85
09/14/200920Acceptable72.713.91.86180
08/20/200910Acceptable79.513.12.22171
07/28/2009<10Acceptable76.312.42.71475
07/26/2009<10Acceptablen/an/an/an/an/a
07/25/200910Acceptablen/an/an/an/an/a
06/22/2009<10Acceptable70.42.81.27583
06/06/200920Acceptablen/an/an/an/an/a
05/12/200910Acceptable60.86.81.22493
10/20/2008<10Acceptable6224.21.8583
09/24/200810Acceptable70.413.91.9983
08/19/2008<10Acceptable75.418.52981
07/14/200826Acceptable79.110.34.711104
07/02/2008<10Acceptable76.113.64.72786
05/19/200810Acceptable58.710.413591
09/06/20072Acceptable7519.44.71086
08/16/20076Acceptable78.418.53.21579
07/11/20071032Beach Advisory72223.65185
06/18/20071Acceptablen/a14.7n/an/a98
05/23/20073Acceptable63.19.61.144n/a
04/18/2007205Beach Advisory44.80.90.14999
11/10/2006143Beach Advisory52.73.11.24594
10/18/200630Acceptable62.89.43.2787
09/26/2006<10Acceptable71.416.6n/an/a97

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:

Manhattan, NY
This deep water sample site off 79th St. has recreational boating and occasional swim events.

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:

Hudson County Dept. of Health: 201-271-4310, NYSDEC Region 2: 718-482-4933 and NYCDEP: 212-639-9675

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