Water Quality
Water Quality > Hudson River Estuary Data > New York City, Hudson County & Bergen County Sites > The Battery mid-channel

The Battery mid-channel

The Battery midchannel
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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

112 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
10/16/2023 31 Acceptable 0.0 0.0 0.7 0.0 0.8
09/18/2023 63 Beach Advisory 0.9 0.1 0.0 0.0 1.0
08/21/2023 <10 Acceptable 0.0 0.0 0.0 1.6 1.6
07/17/2023 41 Acceptable 0.0 0.1 0.2 0.1 0.4
06/26/2023 <10 Acceptable 0.0 0.0 0.1 0.0 0.1
05/01/2023 884 Beach Advisory 3.1 1.1 1.7 0.0 6.0
10/09/2022 10 Acceptable 0.0 0.0 0.1 0.7 0.9
09/09/2022 <10 Acceptable 0.0 1.1 0.1 0.0 1.2
08/11/2022 <10 Acceptable 0.1 0.0 0.6 0.0 0.7
07/14/2022 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/13/2022 <10 Acceptable 0.3 0.0 0.0 0.7 1.0
05/23/2022 41 Acceptable 0.0 0.4 0.0 0.7 1.2
10/25/2021 20 Acceptable 0.0 0.0 0.0 0.0 0.0
09/13/2021 <10 Acceptable 0.0 0.0 0.0 0.1 0.1
08/16/2021 10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/19/2021 <10 Acceptable 0.0 0.6 0.0 0.0 0.6
06/07/2021 <10 Acceptable 0.0 0.0 0.7 0.3 1.0
05/17/2021 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/13/2020 121 Beach Advisory 0.9 0.2 0.0 0.0 1.1
09/17/2020 10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/13/2020 20 Acceptable 1.5 0.0 0.0 0.0 1.5
07/13/2020 <10 Acceptable 0.1 0.0 2.5 0.0 2.6
06/15/2020 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/26/2020 10 Acceptable 0.0 0.0 0.0 0.8 0.8
10/07/2019 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/09/2019 <10 Acceptable 0.0 0.0 0.0 0.3 0.3
08/05/2019 20 Acceptable 0.0 0.0 0.2 0.0 0.2
07/08/2019 20 Acceptable 0.0 0.0 0.0 0.0 0.0
06/03/2019 41 Acceptable 0.0 0.3 0.0 0.0 0.3
05/06/2019 41 Acceptable 0.0 1.3 0.1 0.1 1.5
10/09/2018 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/09/2018 51 Acceptable 0.5 0.0 0.0 0.4 0.8
08/13/2018 211 Beach Advisory 0.7 0.0 2.9 0.0 3.6
07/16/2018 <10 Acceptable 0.0 0.6 0.4 0.0 1.0
06/12/2018 10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/05/2018 10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/15/2017 10 Acceptable 0.0 0.1 0.0 0.1 0.2
09/10/2017 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/13/2017 <10 Acceptable 0.0 0.1 0.0 0.0 0.1
07/09/2017 <10 Acceptable 0.0 0.0 1.8 0.0 1.8
06/11/2017 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/14/2017 10 Acceptable 0.0 1.6 0.0 0.0 1.6
04/04/2017 216 Beach Advisory 1.2 0.0 0.0 0.0 1.2
10/12/2016 <10 Acceptable 0.0 0.0 0.0 0.6 0.6
09/13/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/14/2016 <10 Acceptable 0.0 0.0 0.3 0.2 0.5
07/12/2016 10 Acceptable 0.0 0.0 0.0 0.5 0.5
06/14/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/19/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/11/2015 <10 Acceptable 0.0 0.0 0.9 0.0 0.9
09/10/2015 108 Beach Advisory 1.6 0.0 0.0 0.0 1.6
08/11/2015 288 Beach Advisory 1.2 0.0 0.0 0.0 1.2
07/07/2015 <10 Acceptable 0.1 0.0 0.0 0.0 0.1
06/10/2015 <10 Acceptable 0.0 0.0 0.1 0.0 0.1
05/11/2015 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/12/2014 <10 Acceptable 0.0 0.3 0.0 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 20 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 52 Acceptable 0.0 0.9 0.1 0.0 0.9
07/17/2013 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/19/2013 20 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 86 Beach Advisory 0.1 1.1 0.0 0.0 1.2
10/10/2012 41 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 63 Beach Advisory 0.0 0.0 1.1 0.0 1.1
09/14/2011 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/16/2011 20 Acceptable 0.0 0.6 5.8 0.0 6.4
07/25/2011 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/21/2011 10 Acceptable 0.0 0.0 0.0 0.1 0.1
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 97 Beach Advisory 0.2 0.9 0.0 0.0 1.1
10/12/2010 134 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 <10 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
05/21/2010 20 Acceptable 0.0 0.0 0.0 1.1 1.1
10/19/2009 20 Acceptable 0.0 0.3 0.0 0.1 0.4
09/14/2009 <10 Acceptable 0.0 0.0 0.0 0.8 0.9
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 20 Acceptable 0.0 0.4 0.3 0.0 0.7
06/06/2009 52 Acceptable 0.0 0.9 0.5 0.5 2.0
06/05/2009 10 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
07/14/2008 5 Acceptable 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 47 Acceptable 0.0 0.1 0.1 0.0 0.1
05/19/2008 20 Acceptable 0.0 0.1 0.0 0.9 1.1
09/06/2007 2 Acceptable 0.0 0.0 0.0 0.0 0.0
08/16/2007 <10 Acceptable 0.0 0.0 0.0 0.0 0.1
07/11/2007 1 Acceptable 1.0 0.0 0.0 0.0 1.0
06/18/2007 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/23/2007 1 Acceptable 0.0 0.0 0.0 0.0 0.0
04/18/2007 274 Beach Advisory 0.0 0.0 0.9 7.6 8.5
11/10/2006 107 Beach Advisory 0.0 0.0 3.6 0.0 3.6
10/18/2006 116 Beach Advisory 0.0 1.1 0.0 0.0 1.1
09/26/2006 <10 Acceptable 0.0 0.0 0.0 0.1 0.1

Entero Count (fecal indicator) and Rainfall Correlation

112 Samples taken

All Water Quality Parameters

112 Samples taken

Sample Date [i] Entero 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 [i] Temp (f)
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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
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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
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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
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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
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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
10/16/2023 31 Acceptable 17.36 18.43 1.08 3.9 100.5
09/18/2023 63 Beach Advisory 22.33 20.29 2.53 n/a 59.4
08/21/2023 <10 Acceptable 24.2 15.01 3.39 6.5 82.6
07/17/2023 41 Acceptable 26.51 6.34 3.85 14.8 86.1
06/26/2023 <10 Acceptable 71.9 13.2 14.5 7.1 114.2
05/01/2023 884 Beach Advisory 54.2 5.1 2.0 9.2 96.1
10/09/2022 10 Acceptable 62.2 22.5 1.8 11.1 82.1
09/09/2022 <10 Acceptable 76.6 21.9 3 8.1 70.3
08/11/2022 <10 Acceptable 79.1 23.1 4.7 5.9 81.1
07/14/2022 <10 Acceptable 75.2 21.5 5 8.9 88.5
06/13/2022 <10 Acceptable 69.4 19.6 1.7 n/a n/a
05/23/2022 41 Acceptable 62.7 11.6 1.5 20.7 n/a
10/25/2021 20 Acceptable 64.364 11.33 3.04 n/a 85.9
09/13/2021 <10 Acceptable 74.408 8.66 1.36 7.9 77.6
08/16/2021 10 Acceptable 76.928 12.4 2.57 10.3 76.6
07/19/2021 <10 Acceptable 78.512 4.51 4.9 9.8 82.9
06/07/2021 <10 Acceptable 68.81 13.74 1.7 9.9 91.5
05/17/2021 <10 Acceptable 61.304 10.88 1.33 5.9 95.1
10/13/2020 121 Beach Advisory 63.086 18.28 3.13 5.4 85
09/17/2020 10 Acceptable 72.86 22.62 2.77 11.7 71.3
08/13/2020 20 Acceptable 79.016 18.39 22.41 9.5 95.9
07/13/2020 <10 Acceptable 79.304 20.01 6.72 6.5 88.8
06/15/2020 <10 Acceptable 69.53 14.44 7.14 5.2 108.6
05/26/2020 10 Acceptable 59.576 14.72 3.54 14.7 95.6
10/07/2019 <10 Acceptable 68.378 22.83 2.69 4.1 84.3
09/09/2019 <10 Acceptable 73.796 16.43 2.85 5 81.2
08/05/2019 20 Acceptable 76.946 22.24 7.88 7.1 76.5
07/08/2019 20 Acceptable 70.916 22.83 2.57 8.6 75
06/03/2019 41 Acceptable 64.958 13.05 2.03 14.2 88.2
05/06/2019 41 Acceptable 56.822 8.77 1.73 13 93.4
10/09/2018 <10 Acceptable 70.718 14.37 1.95 14 73.4
09/09/2018 51 Acceptable 75.488 21.12 2.59 9.3 68.6
08/13/2018 211 Beach Advisory 76.334 20.35 2.84 7.3 64.9
07/16/2018 <10 Acceptable 73.76 25.88 2.21 7.9 75
06/12/2018 10 Acceptable 67.19 18.23 6.53 11 102.5
05/05/2018 10 Acceptable 55.022 6.75 2.88 17.2 100.3
10/15/2017 10 Acceptable 69.296 21.13 2.05 5.8 79.4
09/10/2017 <10 Acceptable 70.574 21.47 6.71 6 89
08/13/2017 <10 Acceptable 74.894 23.08 6.67 8.1 82.5
07/09/2017 <10 Acceptable 74.894 12.12 2.88 14.5 95.6
06/11/2017 <10 Acceptable 67.784 12.08 4.17 11.7 92.4
05/14/2017 10 Acceptable 58.478 6.37 2.44 18.6 96.8
04/04/2017 216 Beach Advisory 42.62 6.5 2 23.8 98.2
10/12/2016 <10 Acceptable 66.038 21.69 2.79 33.9 86.5
09/13/2016 <10 Acceptable 76.352 17.61 10.4 n/a 102.1
08/14/2016 <10 Acceptable 82.562 15.06 23.45 25.9 141.9
07/12/2016 10 Acceptable 75.038 20.78 6.97 9.7 93.5
06/14/2016 <10 Acceptable 69.278 9.72 3.77 20.2 99.9
05/19/2016 <10 Acceptable 59.342 14.64 2.13 n/a 96.8
10/11/2015 <10 Acceptable 65.66 20.4 3.75 11 87.5
09/10/2015 108 Beach Advisory 77.234 22.03 5.44 10.3 73
08/11/2015 288 Beach Advisory 74.516 22.72 4.16 8.3 84.4
07/07/2015 <10 Acceptable 72.122 21.18 3.08 24.5 80.3
06/10/2015 <10 Acceptable 65.03 21.89 3 n/a 84.2
05/11/2015 <10 Acceptable 59.144 19.52 4.28 12 99
10/12/2014 <10 Acceptable 64.832 25.58 1.85 4.9 82.3
09/07/2014 <10 Acceptable 76.658 17.36 3.45 15.5 74.9
08/11/2014 <10 Acceptable 76.028 21.14 0.66 20.8 78.9
07/07/2014 <10 Acceptable 74.642 12.65 5.61 12.7 92.9
06/12/2014 20 Acceptable 65.732 16.82 18.23 20.3 100.4
05/12/2014 10 Acceptable 58.028 7.53 2.29 23.5 97.6
10/16/2013 <10 Acceptable 65.138 23.73 1.15 6.1 82.9
09/18/2013 <10 Acceptable 67.406 25.36 3.81 9.6 79.1
08/14/2013 52 Acceptable 73.526 19.66 3.93 29.9 80.1
07/17/2013 <10 Acceptable 78.836 13.04 10.67 109.6 93.1
06/19/2013 20 Acceptable 69.944 5.98 3.45 17.2 92.6
05/31/2013 <10 Acceptable 64.796 13.59 2.42 34.8 86.8
11/08/2012 86 Beach Advisory 51.404 11.87 1.21 16.7 90.9
10/10/2012 41 Acceptable 65.786 14.16 4.2 12.7 84.5
09/10/2012 10 Acceptable 76.46 18.84 6.06 50.2 78.8
08/13/2012 <10 Acceptable 80.726 19.49 7.53 8.3 108.5
07/16/2012 <10 Acceptable 78.332 22.38 4.92 7.9 88.4
06/11/2012 <10 Acceptable 69.53 17.52 3.08 n/a 80.9
05/15/2012 <10 Acceptable 60.8 8.85 2.1 29.9 91.9
10/21/2011 63 Beach Advisory 62.168 10.97 1.32 20.9 85.2
09/14/2011 <10 Acceptable 72.77 5.7 1.64 43.2 81.1
08/16/2011 20 Acceptable 75.668 20.28 1.96 23 72.9
07/25/2011 <10 Acceptable 80.3 10.58 14.44 8 114.2
07/21/2011 10 Acceptable n/a n/a n/a n/a n/a
07/19/2011 <10 Acceptable 77.738 19.14 4.81 141.2 86.5
06/27/2011 10 Acceptable 76.244 4.78 7.54 35.7 94.3
05/16/2011 97 Beach Advisory 56.984 12.82 3.31 159.1 87.1
10/12/2010 134 Beach Advisory 66.164 16.25 4.57 7.7 83
09/11/2010 <10 Acceptable 70.556 27.42 7.7 19.3 97.9
08/17/2010 <10 Acceptable 76.838 21.57 3.11 7 61.1
07/21/2010 10 Acceptable 79.97 17.51 31.16 8.8 104.9
06/15/2010 <10 Acceptable 65.948 25.11 2.52 5.9 76.6
05/21/2010 20 Acceptable 60.8 14.63 2.17 21.8 87.1
10/19/2009 20 Acceptable 57.2 22.2 n/a n/a 89.1
09/14/2009 <10 Acceptable 73.004 14.61 1.89 26 85.2
08/20/2009 <10 Acceptable 77.27 21.33 2.27 14 67.9
07/28/2009 10 Acceptable 76.19 17.65 3.53 8.2 76.2
06/22/2009 20 Acceptable 69.8 6.66 0.92 20.2 80
06/06/2009 52 Acceptable n/a n/a n/a n/a n/a
06/05/2009 10 Acceptable n/a n/a n/a n/a n/a
05/12/2009 10 Acceptable 60.17 11.6 1.3 16.9 90.5
10/20/2008 <10 Acceptable 62.294 25.42 1.22 1.6 82.5
09/24/2008 <10 Acceptable 70.3 16.38 1.74 8.8 79.1
08/19/2008 <10 Acceptable 73.058 23.7 2.59 5.8 80.4
07/14/2008 5 Acceptable 76.244 15.03 4.55 10.3 92.9
07/02/2008 <10 Acceptable 74.102 17.91 2.54 10 86.2
06/24/2008 47 Acceptable 70.484 20.68 2.67 7.7 83.2
05/19/2008 20 Acceptable 57.524 16.81 1.2 19.4 90.5
09/06/2007 2 Acceptable 74.354 23.97 2.88 4.2 77.9
08/16/2007 <10 Acceptable 76.712 22.96 3.34 10.1 76.8
07/11/2007 1 Acceptable 70.826 23.615 1.935 18.25 72.65
06/18/2007 <10 Acceptable n/a n/a n/a n/a n/a
05/23/2007 1 Acceptable n/a n/a n/a n/a n/a
04/18/2007 274 Beach Advisory 46.112 1.88 0.14 33.8 100
11/10/2006 107 Beach Advisory 53.582 7.88 1.03 38.9 92
10/18/2006 116 Beach Advisory 63.266 15.3 2.5 9.8 83.4
09/26/2006 <10 Acceptable 69.4 23.2 n/a n/a 92

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
The deep water sample site at Battery Park has recreational boat traffic, as well as some kayaking 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:

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

Tell Gov. Hochul to block invasive species at the Erie and Champlain canals
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