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

79 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 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
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 0.8
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

79 Samples taken

All Water Quality Parameters

79 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 61 Beach Advisory 17.1 20.35 1.03 3 100.5
09/18/2023 31 Acceptable 22.12 22.58 2.69 n/a 44.6
08/21/2023 <10 Acceptable 25.33 17.7 2.52 4.9 83.7
10/09/2022 31 Acceptable 62.1 23.76 1.55 6.5 79
09/09/2022 10 Acceptable 75.5 25.62 2.1 6.4 64.6
08/11/2022 10 Acceptable 76.3 26.28 2.14 7 58.8
07/14/2022 <10 Acceptable 73 24.5 2.4 9.8 76.4
06/13/2022 10 Acceptable 65.7 23.5 1.3 4.3 n/a
05/23/2022 10 Acceptable 60.1 21.9 1 10.6 n/a
10/25/2021 30 Acceptable 64.418 17.34 3.01 1.3 85.9
09/13/2021 <10 Acceptable 73.184 16.97 2.11 10.1 76.6
08/16/2021 10 Acceptable 75.11 24.01 1.94 3.9 66.4
07/19/2021 10 Acceptable 75.776 18.65 3.81 4.6 75.1
06/07/2021 20 Acceptable 63.086 23.75 1.14 8.7 80.6
05/17/2021 <10 Acceptable 60.53 19.06 0.97 5.1 93.3
10/13/2020 41 Acceptable 63.464 24.83 2.78 3.5 78.7
09/17/2020 <10 Acceptable 72.842 24.22 2.85 7.3 69.5
08/14/2020 10 Acceptable 76.352 23.08 6.89 4.2 80.1
07/13/2020 <10 Acceptable 79.628 21.48 11.36 5.3 95.9
06/15/2020 <10 Acceptable 67.37 20.31 6.32 3.2 104.1
05/26/2020 10 Acceptable 58.568 22.13 4.67 9.1 95.5
10/07/2019 <10 Acceptable 68.468 24.16 5.87 1.7 92.8
09/09/2019 <10 Acceptable 73.328 21.83 4.39 1.9 86.4
08/05/2019 10 Acceptable 75.092 24.3 2.55 12.5 58.9
07/08/2019 <10 Acceptable 72.068 22.15 3.79 5.8 80.5
06/03/2019 20 Acceptable 61.898 19.48 2 15.6 81.5
05/06/2019 63 Beach Advisory 53.564 17.74 3.56 23.1 89.1
10/09/2018 10 Acceptable 70.86 20.85 1.92 9.6 73.8
09/09/2018 10 Acceptable 75.56 24.05 2.28 6.2 64.8
08/13/2018 459 Beach Advisory 75.65 22.33 2 13.1 52.6
07/16/2018 10 Acceptable 73.24 26.16 1.95 9.6 73.7
06/12/2018 10 Acceptable 65.34 22.51 2.93 8.6 88.6
05/05/2018 10 Acceptable 53.71 14.32 4.66 9.9 100.6
10/15/2017 <10 Acceptable 69 24.12 5.11 3.9 84.8
09/10/2017 <10 Acceptable 69.692 23.5 3.34 12.7 76.8
08/13/2017 <10 Acceptable 74.858 23.36 6.21 7.3 83
07/09/2017 20 Acceptable 69.87 21.74 2.49 30.7 82.5
06/11/2017 <10 Acceptable 64.1 20.12 3.09 10.1 88
05/14/2017 10 Acceptable 55.1 18.14 4.37 12.1 95.2
10/12/2016 10 Acceptable 66.29 25.16 2.55 32.1 89.8
09/13/2016 <10 Acceptable 75.4 25.09 6.81 n/a 85.5
08/14/2016 <10 Acceptable 79.2 23.95 5.53 25 87
07/12/2016 <10 Acceptable 74.3 23.04 5.3 6.8 89.5
06/14/2016 <10 Acceptable 66.4 18.66 2.96 24.6 93.6
05/20/2016 <10 Acceptable 55.2 21.95 6.51 n/a 91.6
10/11/2015 10 Acceptable 65.498 24.43 2.21 12.1 79.7
09/10/2015 75 Beach Advisory 77.18 25.95 5.24 8.9 67.6
08/11/2015 520 Beach Advisory 74.12 25.46 2.59 6.4 70.5
07/07/2015 10 Acceptable 71.942 22.03 4.48 35 82.6
06/10/2015 <10 Acceptable 65.624 21.52 2.86 n/a 85.3
05/11/2015 <10 Acceptable 56.516 23.46 5.26 12.3 97.2
10/12/2014 <10 Acceptable 64.418 25.96 2.27 8.1 79.8
09/07/2014 <10 Acceptable 75.704 23.8 2.66 5.2 64.7
08/11/2014 <10 Acceptable 74.138 23.63 0.57 22.5 69.5
07/07/2014 <10 Acceptable 75.092 14.43 7.98 7.7 102.1
06/12/2014 20 Acceptable 64.364 22.33 3.82 10.5 82.2
05/12/2014 <10 Acceptable 54.788 19.09 5.31 13 99.2
10/16/2013 <10 Acceptable 65.264 24.12 1.14 13.9 78.5
09/18/2013 10 Acceptable 67.478 25.37 2.09 34.4 71
08/14/2013 20 Acceptable 73.328 20.49 4.49 24.1 82.1
07/17/2013 <10 Acceptable 78.512 18.16 9.61 51.1 98.6
06/19/2013 <10 Acceptable 68.882 12.7 2.63 19.8 89.3
05/31/2013 10 Acceptable 64.436 15.19 2.02 22 86.1
10/10/2012 10 Acceptable 66.29 19.6 2.33 14.6 79.3
09/10/2012 <10 Acceptable 76.208 21.34 5.66 41.4 79.5
08/13/2012 <10 Acceptable 78.944 29.52 3.11 5.1 87.8
07/16/2012 <10 Acceptable 75.938 33.75 2.52 3.7 75.8
06/11/2012 <10 Acceptable 69.134 19.76 4.93 n/a 83.8
05/15/2012 10 Acceptable 59.72 16.54 2.44 41.7 87.7
10/21/2011 62 Beach Advisory 61.664 13.36 1.39 27.4 86.7
09/14/2011 10 Acceptable 72.86 12.21 1.73 9.9 79.7
08/16/2011 52 Acceptable 73.994 23.14 1.21 12.2 63.9
07/19/2011 20 Acceptable 74.912 22.07 3.8 66 89.7
06/27/2011 <10 Acceptable 74.03 12.99 4.94 29.8 90.2
05/16/2011 275 Beach Advisory 55.562 19.78 4.81 227.1 83.3
10/12/2010 161 Beach Advisory 65.966 17.54 3.63 6.7 81.6
09/11/2010 <10 Acceptable 69.35 28.66 2.94 14.4 86.3
08/17/2010 <10 Acceptable 76.6 25.88 5.74 4.3 65.5
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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