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

114 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
06/10/2024 <110 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/20/2024 10 Acceptable 0.0 0.0 0.0 0.0 0.1
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 5.9
10/09/2022 10 Acceptable 0.0 0.0 0.0 0.1 0.1
09/09/2022 <10 Acceptable 0.0 0.0 1.1 0.1 1.2
08/11/2022 <10 Acceptable 0.1 0.1 0.0 0.6 0.8
07/14/2022 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/13/2022 <10 Acceptable 0.0 0.3 0.0 0.0 0.3
05/23/2022 41 Acceptable 0.0 0.0 0.4 0.0 0.5
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 0.9
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 0.8
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 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 1.9
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 0.2
05/19/2008 20 Acceptable 0.0 0.1 0.0 0.9 1.0
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 0.0
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

114 Samples taken

All Water Quality Parameters

114 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
06/10/2024 <110 Beach Advisory 67.28 NS NS NS 76.1
05/20/2024 10 Acceptable 62.49 9.28 1.74 2.5 109.1
10/16/2023 31 Acceptable 63.3 18.4 1.1 4 101
09/18/2023 63 Beach Advisory 72.19 20.29 2.53 n/a 59.4
08/21/2023 <10 Acceptable 75.6 15 3.4 7 83
07/17/2023 41 Acceptable 79.7 6.3 3.9 15 86
06/26/2023 <10 Acceptable 71.9 13.2 14.5 7 114
05/01/2023 884 Beach Advisory 54.2 5.1 2 9 96
10/09/2022 10 Acceptable 62.2 22.5 1.8 11 82
09/09/2022 <10 Acceptable 76.6 21.9 3 8 70
08/11/2022 <10 Acceptable 79.1 23.1 4.7 6 81
07/14/2022 <10 Acceptable 75.2 21.5 5 9 89
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 21 n/a
10/25/2021 20 Acceptable 64.4 11.3 3 n/a 86
09/13/2021 <10 Acceptable 74.4 8.7 1.4 8 78
08/16/2021 10 Acceptable 76.9 12.4 2.6 10 77
07/19/2021 <10 Acceptable 78.5 4.5 4.9 10 83
06/07/2021 <10 Acceptable 68.8 13.7 1.7 10 92
05/17/2021 <10 Acceptable 61.3 10.9 1.3 6 95
10/13/2020 121 Beach Advisory 63.1 18.3 3.1 5 85
09/17/2020 10 Acceptable 72.9 22.6 2.8 12 71
08/13/2020 20 Acceptable 79 18.4 22.4 10 96
07/13/2020 <10 Acceptable 79.3 20 6.7 7 89
06/15/2020 <10 Acceptable 69.5 14.4 7.1 5 109
05/26/2020 10 Acceptable 59.6 14.7 3.5 15 96
10/07/2019 <10 Acceptable 68.4 22.8 2.7 4 84
09/09/2019 <10 Acceptable 73.8 16.4 2.9 5 81
08/05/2019 20 Acceptable 76.9 22.2 7.9 7 77
07/08/2019 20 Acceptable 70.9 22.8 2.6 9 75
06/03/2019 41 Acceptable 65 13.1 2 14 88
05/06/2019 41 Acceptable 56.8 8.8 1.7 13 93
10/09/2018 <10 Acceptable 70.7 14.4 2 14 73
09/09/2018 51 Acceptable 75.5 21.1 2.6 9 69
08/13/2018 211 Beach Advisory 76.3 20.4 2.8 7 65
07/16/2018 <10 Acceptable 73.8 25.9 2.2 8 75
06/12/2018 10 Acceptable 67.2 18.2 6.5 11 103
05/05/2018 10 Acceptable 55 6.8 2.9 17 100
10/15/2017 10 Acceptable 69.3 21.1 2.1 6 79
09/10/2017 <10 Acceptable 70.6 21.5 6.7 6 89
08/13/2017 <10 Acceptable 74.9 23.1 6.7 8 83
07/09/2017 <10 Acceptable 74.9 12.1 2.9 15 96
06/11/2017 <10 Acceptable 67.8 12.1 4.2 12 92
05/14/2017 10 Acceptable 58.5 6.4 2.4 19 97
04/04/2017 216 Beach Advisory 42.6 6.5 2 24 98
10/12/2016 <10 Acceptable 66 21.7 2.8 34 87
09/13/2016 <10 Acceptable 76.4 17.6 10.4 n/a 102
08/14/2016 <10 Acceptable 82.6 15.1 23.5 26 142
07/12/2016 10 Acceptable 75 20.8 7 10 94
06/14/2016 <10 Acceptable 69.3 9.7 3.8 20 100
05/19/2016 <10 Acceptable 59.3 14.6 2.1 n/a 97
10/11/2015 <10 Acceptable 65.7 20.4 3.8 11 88
09/10/2015 108 Beach Advisory 77.2 22 5.4 10 73
08/11/2015 288 Beach Advisory 74.5 22.7 4.2 8 84
07/07/2015 <10 Acceptable 72.1 21.2 3.1 25 80
06/10/2015 <10 Acceptable 65 21.9 3 n/a 84
05/11/2015 <10 Acceptable 59.1 19.5 4.3 12 99
10/12/2014 <10 Acceptable 64.8 25.6 1.9 5 82
09/07/2014 <10 Acceptable 76.7 17.4 3.5 16 75
08/11/2014 <10 Acceptable 76 21.1 0.7 21 79
07/07/2014 <10 Acceptable 74.6 12.7 5.6 13 93
06/12/2014 20 Acceptable 65.7 16.8 18.2 20 100
05/12/2014 10 Acceptable 58 7.5 2.3 24 98
10/16/2013 <10 Acceptable 65.1 23.7 1.2 6 83
09/18/2013 <10 Acceptable 67.4 25.4 3.8 10 79
08/14/2013 52 Acceptable 73.5 19.7 3.9 30 80
07/17/2013 <10 Acceptable 78.8 13 10.7 110 93
06/19/2013 20 Acceptable 69.9 6 3.5 17 93
05/31/2013 <10 Acceptable 64.8 13.6 2.4 35 87
11/08/2012 86 Beach Advisory 51.4 11.9 1.2 17 91
10/10/2012 41 Acceptable 65.8 14.2 4.2 13 85
09/10/2012 10 Acceptable 76.5 18.8 6.1 50 79
08/13/2012 <10 Acceptable 80.7 19.5 7.5 8 109
07/16/2012 <10 Acceptable 78.3 22.4 4.9 8 88
06/11/2012 <10 Acceptable 69.5 17.5 3.1 n/a 81
05/15/2012 <10 Acceptable 60.8 8.9 2.1 30 92
10/21/2011 63 Beach Advisory 62.2 11 1.3 21 85
09/14/2011 <10 Acceptable 72.8 5.7 1.6 43 81
08/16/2011 20 Acceptable 75.7 20.3 2 23 73
07/25/2011 <10 Acceptable 80.3 10.6 14.4 8 114
07/21/2011 10 Acceptable n/a n/a n/a n/a n/a
07/19/2011 <10 Acceptable 77.7 19.1 4.8 141 87
06/27/2011 10 Acceptable 76.2 4.8 7.5 36 94
05/16/2011 97 Beach Advisory 57 12.8 3.3 159 87
10/12/2010 134 Beach Advisory 66.2 16.3 4.6 8 83
09/11/2010 <10 Acceptable 70.6 27.4 7.7 19 98
08/17/2010 <10 Acceptable 76.8 21.6 3.1 7 61
07/21/2010 10 Acceptable 80 17.5 31.2 9 105
06/15/2010 <10 Acceptable 65.9 25.1 2.5 6 77
05/21/2010 20 Acceptable 60.8 14.6 2.2 22 87
10/19/2009 20 Acceptable 57.2 22.2 n/a n/a 89
09/14/2009 <10 Acceptable 73 14.6 1.9 26 85
08/20/2009 <10 Acceptable 77.3 21.3 2.3 14 68
07/28/2009 10 Acceptable 76.2 17.7 3.5 8 76
06/22/2009 20 Acceptable 69.8 6.7 0.9 20 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 60.2 11.6 1.3 17 91
10/20/2008 <10 Acceptable 62.3 25.4 1.2 2 83
09/24/2008 <10 Acceptable 70.3 16.4 1.7 9 79
08/19/2008 <10 Acceptable 73.1 23.7 2.6 6 80
07/14/2008 5 Acceptable 76.2 15 4.6 10 93
07/02/2008 <10 Acceptable 74.1 17.9 2.5 10 86
06/24/2008 47 Acceptable 70.5 20.7 2.7 8 83
05/19/2008 20 Acceptable 57.5 16.8 1.2 19 91
09/06/2007 2 Acceptable 74.4 24 2.9 4 78
08/16/2007 <10 Acceptable 76.7 23 3.3 10 77
07/11/2007 1 Acceptable 70.8 23.6 1.9 18 73
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 46.1 1.9 0.1 34 100
11/10/2006 107 Beach Advisory 53.6 7.9 1 39 92
10/18/2006 116 Beach Advisory 63.3 15.3 2.5 10 83
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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