Water Quality
Water Quality > Hudson River Estuary Data > New York City, Hudson County & Bergen County Sites > Bayridge Flats

Bayridge Flats

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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

84 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 <10 Acceptable 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 61 Beach Advisory 0.0 0.0 0.7 0.0 0.8
09/18/2023 31 Acceptable 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 84 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/26/2023 0 Acceptable 0.0 0.0 0.0 0.0 0.0
05/01/2023 683 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/09/2022 31 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 10 Acceptable 0.0 0.0 0.4 0.0 0.5
10/25/2021 30 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 20 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 41 Acceptable 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
08/14/2020 10 Acceptable 0.1 1.5 0.0 0.0 1.6
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 10 Acceptable 0.0 0.0 0.2 0.0 0.2
07/08/2019 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/03/2019 20 Acceptable 0.0 0.3 0.0 0.0 0.3
05/06/2019 63 Beach Advisory 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 10 Acceptable 0.5 0.0 0.0 0.4 0.9
08/13/2018 459 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 20 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
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
05/20/2016 <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 75 Beach Advisory 1.6 0.0 0.0 0.0 1.6
08/11/2015 520 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 20 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 <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
10/10/2012 10 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 62 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 52 Acceptable 0.0 0.6 5.8 0.0 6.4
07/19/2011 20 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 275 Beach Advisory 0.2 0.9 0.0 0.0 1.1
10/12/2010 161 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
08/09/2010 <10 Acceptable 0.0 0.0 0.0 0.0 0.0

Entero Count (fecal indicator) and Rainfall Correlation

84 Samples taken

All Water Quality Parameters

84 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 <10 Acceptable 67.1 NS NS NS 78.0
05/20/2024 <10 Acceptable 62.74 14.31 1.75 0 110.1
10/16/2023 61 Beach Advisory 62.8 20.4 1 3 101
09/18/2023 31 Acceptable 71.82 22.58 2.69 n/a 44.6
08/21/2023 <10 Acceptable 77.6 17.7 2.5 5 84
07/17/2023 84 Beach Advisory 76.3 17.2 2.1 9 73
06/26/2023 0 Acceptable 68 23.9 2.3 7 78
05/01/2023 683 Beach Advisory 53.9 11.6 1.9 15 94
10/09/2022 31 Acceptable 62.1 23.8 1.6 7 79
09/09/2022 10 Acceptable 75.5 25.6 2.1 6 65
08/11/2022 10 Acceptable 76.3 26.3 2.1 7 59
07/14/2022 <10 Acceptable 73 24.5 2.4 10 76
06/13/2022 10 Acceptable 65.7 23.5 1.3 4 n/a
05/23/2022 10 Acceptable 60.1 21.9 1 11 n/a
10/25/2021 30 Acceptable 64.4 17.3 3 1 86
09/13/2021 <10 Acceptable 73.2 17 2.1 10 77
08/16/2021 10 Acceptable 75.1 24 1.9 4 66
07/19/2021 10 Acceptable 75.8 18.7 3.8 5 75
06/07/2021 20 Acceptable 63.1 23.8 1.1 9 81
05/17/2021 <10 Acceptable 60.5 19.1 1 5 93
10/13/2020 41 Acceptable 63.5 24.8 2.8 4 79
09/17/2020 <10 Acceptable 72.8 24.2 2.9 7 70
08/14/2020 10 Acceptable 76.4 23.1 6.9 4 80
07/13/2020 <10 Acceptable 79.6 21.5 11.4 5 96
06/15/2020 <10 Acceptable 67.4 20.3 6.3 3 104
05/26/2020 10 Acceptable 58.6 22.1 4.7 9 96
10/07/2019 <10 Acceptable 68.5 24.2 5.9 2 93
09/09/2019 <10 Acceptable 73.3 21.8 4.4 2 86
08/05/2019 10 Acceptable 75.1 24.3 2.6 13 59
07/08/2019 <10 Acceptable 72.1 22.2 3.8 6 81
06/03/2019 20 Acceptable 61.9 19.5 2 16 82
05/06/2019 63 Beach Advisory 53.6 17.7 3.6 23 89
10/09/2018 10 Acceptable 70.9 20.9 1.9 10 74
09/09/2018 10 Acceptable 75.6 24.1 2.3 6 65
08/13/2018 459 Beach Advisory 75.7 22.3 2 13 53
07/16/2018 10 Acceptable 73.2 26.2 2 10 74
06/12/2018 10 Acceptable 65.3 22.5 2.9 9 89
05/05/2018 10 Acceptable 53.7 14.3 4.7 10 101
10/15/2017 <10 Acceptable 69 24.1 5.1 4 85
09/10/2017 <10 Acceptable 69.7 23.5 3.3 13 77
08/13/2017 <10 Acceptable 74.9 23.4 6.2 7 83
07/09/2017 20 Acceptable 69.9 21.7 2.5 31 83
06/11/2017 <10 Acceptable 64.1 20.1 3.1 10 88
05/14/2017 10 Acceptable 55.1 18.1 4.4 12 95
10/12/2016 10 Acceptable 66.3 25.2 2.6 32 90
09/13/2016 <10 Acceptable 75.4 25.1 6.8 n/a 86
08/14/2016 <10 Acceptable 79.2 24 5.5 25 87
07/12/2016 <10 Acceptable 74.3 23 5.3 7 90
06/14/2016 <10 Acceptable 66.4 18.7 3 25 94
05/20/2016 <10 Acceptable 55.2 22 6.5 n/a 92
10/11/2015 10 Acceptable 65.5 24.4 2.2 12 80
09/10/2015 75 Beach Advisory 77.2 26 5.2 9 68
08/11/2015 520 Beach Advisory 74.1 25.5 2.6 6 71
07/07/2015 10 Acceptable 71.9 22 4.5 35 83
06/10/2015 <10 Acceptable 65.6 21.5 2.9 n/a 85
05/11/2015 <10 Acceptable 56.5 23.5 5.3 12 97
10/12/2014 <10 Acceptable 64.4 26 2.3 8 80
09/07/2014 <10 Acceptable 75.7 23.8 2.7 5 65
08/11/2014 <10 Acceptable 74.1 23.6 0.6 23 70
07/07/2014 <10 Acceptable 75.1 14.4 8 8 102
06/12/2014 20 Acceptable 64.4 22.3 3.8 11 82
05/12/2014 <10 Acceptable 54.8 19.1 5.3 13 99
10/16/2013 <10 Acceptable 65.3 24.1 1.1 14 79
09/18/2013 10 Acceptable 67.5 25.4 2.1 34 71
08/14/2013 20 Acceptable 73.3 20.5 4.5 24 82
07/17/2013 <10 Acceptable 78.5 18.2 9.6 51 99
06/19/2013 <10 Acceptable 68.9 12.7 2.6 20 89
05/31/2013 10 Acceptable 64.4 15.2 2 22 86
10/10/2012 10 Acceptable 66.3 19.6 2.3 15 79
09/10/2012 <10 Acceptable 76.2 21.3 5.7 41 80
08/13/2012 <10 Acceptable 78.9 29.5 3.1 5 88
07/16/2012 <10 Acceptable 75.9 33.8 2.5 4 76
06/11/2012 <10 Acceptable 69.1 19.8 4.9 n/a 84
05/15/2012 10 Acceptable 59.7 16.5 2.4 42 88
10/21/2011 62 Beach Advisory 61.7 13.4 1.4 27 87
09/14/2011 10 Acceptable 72.9 12.2 1.7 10 80
08/16/2011 52 Acceptable 74 23.1 1.2 12 64
07/19/2011 20 Acceptable 74.9 22.1 3.8 66 90
06/27/2011 <10 Acceptable 74 13 4.9 30 90
05/16/2011 275 Beach Advisory 55.6 19.8 4.8 227 83
10/12/2010 161 Beach Advisory 66 17.5 3.6 7 82
09/11/2010 <10 Acceptable 69.4 28.7 2.9 14 86
08/17/2010 <10 Acceptable 76.6 25.9 5.7 4 66
08/09/2010 <10 Acceptable n/a n/a n/a n/a n/a

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:

Agencies Responsible:

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

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