Water Quality
Water Quality > Hudson River Estuary Data > Greene County & Columbia County Sites > Gay’s Point mid-channel

Gay’s Point mid-channel

Gay's Point
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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

96 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
10/19/2023 24 Acceptable 0.0 0.0 0.0 0.0 0.0
09/21/2023 44 Acceptable 0.0 0.0 0.0 1.3 1.3
08/24/2023 8 Acceptable 0.0 0.0 0.0 0.0 0.0
07/20/2023 >2420 Beach Advisory 0.0 0.0 0.9 0.0 0.9
06/29/2023 56 Acceptable 0.0 0.1 0.2 1.2 1.6
05/04/2023 124 Beach Advisory 0.0 0.2 0.0 0.7 1.0
10/13/2022 19 Acceptable 0.0 0.0 0.0 0.0 0.0
09/13/2022 36 Acceptable 0.1 0.0 0.0 0.0 0.1
08/22/2022 8 Acceptable 0.0 0.0 0.0 0.1 0.1
07/18/2022 36 Acceptable 0.0 0.0 0.0 0.0 0.0
06/16/2022 68 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/26/2022 39 Acceptable 0.0 0.0 0.0 0.8 0.8
10/28/2021 >2420 Beach Advisory 0.0 0.0 1.0 0.9 1.9
09/16/2021 921 Beach Advisory 0.2 0.8 0.0 0.8 1.8
08/19/2021 23 Acceptable 0.5 0.0 0.0 0.0 0.5
07/22/2021 197 Beach Advisory 0.0 0.5 0.3 0.1 0.9
06/10/2021 28 Acceptable 0.0 0.0 0.6 0.0 0.6
05/20/2021 3 Acceptable 0.0 0.0 0.0 0.0 0.0
10/17/2020 18 Acceptable 0.0 0.6 0.0 0.0 0.6
09/21/2020 3 Acceptable 0.0 0.0 0.0 0.0 0.0
08/17/2020 10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/17/2020 19 Acceptable 0.4 0.1 0.0 0.1 0.5
06/19/2020 20 Acceptable 0.0 0.0 0.0 0.0 0.0
05/29/2020 8 Acceptable 0.0 0.0 0.0 0.0 0.0
10/11/2019 91 Beach Advisory 0.0 0.0 0.0 0.1 0.1
09/13/2019 32 Acceptable 0.0 0.0 0.0 0.0 0.0
08/09/2019 25 Acceptable 0.0 0.8 0.1 0.4 1.3
07/12/2019 10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/08/2019 39 Acceptable 0.0 0.0 0.6 0.5 1.1
05/11/2019 5 Acceptable 0.0 0.2 0.0 0.0 0.2
10/13/2018 233 Beach Advisory 0.3 0.0 1.3 0.0 1.6
09/13/2018 727 Beach Advisory 0.0 0.1 0.1 0.9 1.1
08/17/2018 28 Acceptable 0.0 0.0 0.0 0.0 0.0
07/20/2018 29 Acceptable 0.0 0.0 0.0 0.4 0.4
06/16/2018 6 Acceptable 0.0 0.1 0.0 0.3 0.3
05/09/2018 11 Acceptable 0.0 0.0 0.0 0.3 0.3
10/19/2017 18 Acceptable 0.0 0.0 0.0 0.0 0.0
09/14/2017 17 Acceptable 0.0 0.0 0.0 0.0 0.0
08/17/2017 12 Acceptable 0.0 0.0 0.0 0.0 0.0
07/13/2017 21 Acceptable 0.2 0.1 0.1 0.0 0.3
06/15/2017 2 Acceptable 0.0 0.0 0.0 0.0 0.0
05/18/2017 4 Acceptable 0.0 0.0 0.0 0.3 0.3
10/18/2016 2 Acceptable 0.0 0.0 0.0 0.0 0.0
09/17/2016 6 Acceptable 0.0 0.0 0.0 0.0 0.0
08/18/2016 20 Acceptable 0.0 0.0 0.2 0.0 0.2
07/16/2016 1 Acceptable 0.0 0.1 0.1 0.0 0.2
06/18/2016 3 Acceptable 0.0 0.0 0.0 0.0 0.0
05/23/2016 <1 Acceptable 0.0 0.0 0.0 0.0 0.0
10/15/2015 2 Acceptable 0.0 0.0 0.0 0.0 0.0
09/14/2015 36 Acceptable 0.0 0.9 1.2 0.1 2.3
08/15/2015 3 Acceptable 0.3 0.3 0.0 0.0 0.6
07/11/2015 130 Beach Advisory 0.0 0.0 1.2 0.0 1.2
06/13/2015 4 Acceptable 0.0 1.3 0.0 0.0 1.3
05/14/2015 3 Acceptable 0.0 0.0 0.1 0.0 0.1
10/16/2014 5 Acceptable 0.3 0.1 0.0 0.0 0.4
09/10/2014 2 Acceptable 0.0 0.0 0.0 0.0 0.0
08/14/2014 9 Acceptable 0.0 0.1 0.0 0.0 0.1
07/10/2014 16 Acceptable 0.0 1.7 0.4 0.3 2.3
06/15/2014 980 Beach Advisory 0.0 0.5 0.5 0.1 1.0
05/15/2014 6 Acceptable 0.0 0.1 0.0 0.0 0.1
10/21/2013 9 Acceptable 0.0 0.0 0.0 0.2 0.2
09/21/2013 8 Acceptable 0.0 0.0 0.0 0.0 0.0
08/19/2013 17 Acceptable 0.0 0.0 0.0 0.0 0.0
07/21/2013 20 Acceptable 0.0 0.0 0.0 0.0 0.0
06/24/2013 15 Acceptable 0.0 0.0 0.0 0.0 0.0
06/04/2013 345 Beach Advisory 0.0 0.0 1.1 0.1 1.1
10/15/2012 3 Acceptable 0.0 0.5 0.0 0.1 0.6
09/15/2012 9 Acceptable 0.1 0.0 0.0 0.0 0.1
08/18/2012 17 Acceptable 0.0 0.1 0.0 0.2 0.3
07/21/2012 1 Acceptable 0.0 0.0 0.0 0.2 0.2
06/16/2012 4 Acceptable 0.0 0.0 0.0 0.2 0.2
05/20/2012 19 Acceptable 0.0 0.0 0.0 0.0 0.0
10/16/2011 1733 Beach Advisory 0.0 0.1 1.1 0.3 1.6
09/19/2011 14 Acceptable 0.0 0.0 0.0 0.1 0.1
08/21/2011 6 Acceptable 0.0 0.0 0.0 0.0 0.0
07/14/2011 10 Acceptable 0.0 0.3 0.0 0.0 0.3
07/02/2011 37 Acceptable 0.0 0.0 1.0 1.1 2.1
05/19/2011 260 Beach Advisory 0.8 0.2 0.1 0.5 1.7
10/16/2010 116 Beach Advisory 0.0 1.0 0.3 0.0 1.3
09/14/2010 8 Acceptable 0.0 0.0 0.0 0.0 0.0
08/23/2010 10 Acceptable 0.1 0.4 0.0 0.1 0.5
08/21/2010 3 Acceptable 0.0 0.1 0.1 0.0 0.2
07/19/2010 5 Acceptable 0.0 0.2 0.5 0.0 0.7
06/18/2010 14 Acceptable 0.0 0.0 0.2 0.0 0.3
05/25/2010 4 Acceptable 0.0 0.0 0.0 0.0 0.0
10/23/2009 8 Acceptable 0.0 0.0 0.0 0.0 0.0
09/17/2009 13 Acceptable 0.0 0.0 0.0 0.0 0.0
08/24/2009 2420 Beach Advisory 0.0 0.3 1.0 1.5 2.8
07/31/2009 1203 Beach Advisory 0.6 0.3 1.0 0.0 1.9
06/12/2009 6 Acceptable 0.3 0.4 0.0 0.5 1.1
05/16/2009 1 Acceptable 0.0 0.0 0.5 0.0 0.5
05/15/2009 1 Acceptable 0.0 0.5 0.0 0.0 0.5
10/23/2008 10 Acceptable 0.0 0.2 0.1 0.0 0.2
09/17/2008 11 Acceptable 0.0 0.0 0.0 0.3 0.3
08/09/2008 613 Beach Advisory 0.0 0.0 1.3 0.2 1.5
07/17/2008 2 Acceptable 0.0 0.0 0.0 0.1 0.1

Entero Count (fecal indicator) and Rainfall Correlation

96 Samples taken

All Water Quality Parameters

96 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
10/19/2023 24 Acceptable 13.77 0.09 1.44 8.7 112.1
09/21/2023 44 Acceptable 20.82 0.13 2.26 n/a n/a
08/24/2023 8 Acceptable 22.9 0.11 2.54 1.7 96.2
07/20/2023 >2420 Beach Advisory 24.74 0.1 2.42 79.6 88.5
06/29/2023 56 Acceptable 75.5 0.1 8.0 9.6 87.8
05/04/2023 124 Beach Advisory 51.8 0.1 2.5 31.1 103.2
10/13/2022 19 Acceptable 59.6 0.1 4.7 12.2 90.7
09/13/2022 36 Acceptable 75.1 0.1 4.2 20.2 76
08/22/2022 8 Acceptable 79.6 0.1 5.6 4.2 91.4
07/18/2022 36 Acceptable 79.4 0.1 6.4 5.5 99.7
06/16/2022 68 Beach Advisory 73.6 0.2 9.3 10.2 102.5
05/26/2022 39 Acceptable 68.7 0.1 6 9.3 n/a
10/28/2021 >2420 Beach Advisory 53.546 0.1 3.94 221.4 102.7
09/16/2021 921 Beach Advisory 70.646 0.1 2.25 19.4 92.4
08/19/2021 23 Acceptable 78.71 0.1 5.87 16.9 87.6
07/22/2021 197 Beach Advisory 74.318 0.09 2.23 29 100.4
06/10/2021 28 Acceptable 74.3 0.15 11.43 8.3 147.3
05/20/2021 3 Acceptable 64.094 0.12 5.42 7.4 105.9
10/17/2020 18 Acceptable 60.17 0.14 10.78 8 97.3
09/21/2020 3 Acceptable 66.56 0.15 5.63 16.5 95.1
08/17/2020 10 Acceptable 79.826 0.14 12.27 8.6 106.6
07/17/2020 19 Acceptable 79.52 0.14 9.54 8.6 102.9
06/19/2020 20 Acceptable 76.91 0.14 4.96 7.5 104.7
05/29/2020 8 Acceptable 70.124 0.11 16 7.3 120.3
10/11/2019 91 Beach Advisory 60.836 0.14 8.21 9 96.5
09/13/2019 32 Acceptable 70.466 0.13 18.34 14.5 104.5
08/09/2019 25 Acceptable 80.096 0.14 8.92 12 108.9
07/12/2019 10 Acceptable 79.754 0.09 4.99 8.2 87.5
06/08/2019 39 Acceptable 66.92 0.09 2.85 12.8 97.4
05/11/2019 5 Acceptable 55.526 0.09 2.13 7.2 99.9
10/13/2018 233 Beach Advisory 62.258 0.12 4.48 19.5 93.2
09/13/2018 727 Beach Advisory 73.994 0.14 21.15 13.2 78.2
08/17/2018 28 Acceptable 78.566 0.13 15.07 19 87.6
07/20/2018 29 Acceptable 80.798 0.15 4.34 12.2 92.1
06/16/2018 6 Acceptable 70.79 0.14 4.64 17.3 96.3
05/09/2018 11 Acceptable 57.632 0.08 2.22 10 103.6
10/19/2017 18 Acceptable 63.518 0.12 12.1 14.4 95.6
09/14/2017 17 Acceptable 68.846 0.13 25.93 17.8 107.3
08/17/2017 12 Acceptable 76.496 0.12 6.22 10.9 90.9
07/13/2017 21 Acceptable 75.578 0.08 1.09 45 91.9
06/15/2017 2 Acceptable 70.736 0.09 2.77 13.4 99
05/18/2017 4 Acceptable 59.936 0.08 1.58 27.9 107.8
10/18/2016 2 Acceptable 61.898 0.12 6.61 44.6 94
09/17/2016 6 Acceptable 74.048 0.12 4.67 n/a 87.2
08/18/2016 20 Acceptable 81.302 0.12 1.72 31.2 83.8
07/16/2016 1 Acceptable 79.574 0.11 12.08 16.2 91.2
06/18/2016 3 Acceptable 71.708 0.11 3.72 20.5 99.9
05/23/2016 <1 Acceptable 61.25 0.11 1.64 24.6 103.5
10/15/2015 2 Acceptable 60.278 0.15 16.36 24.1 92.7
09/14/2015 36 Acceptable 76.622 0.14 5.23 15.9 85.8
08/15/2015 3 Acceptable 78.26 0.13 6.53 14.2 101
07/11/2015 130 Beach Advisory 73.85 0.09 3.16 27.9 94.4
06/13/2015 4 Acceptable 71.384 0.14 11 21.4 93.1
05/14/2015 3 Acceptable 66.902 0.11 6.74 40.4 n/a
10/16/2014 5 Acceptable 63.914 0.15 7.27 19.5 107.9
09/10/2014 2 Acceptable 75.416 0.13 2.15 27.4 113.1
08/14/2014 9 Acceptable 76.118 0.12 5.58 22.8 96.8
07/10/2014 16 Acceptable 77.9 0.11 1.8 23.7 95
06/15/2014 980 Beach Advisory 69.008 0.13 0.04 77.8 103.8
05/15/2014 6 Acceptable 62.042 0.08 1.59 19.1 98.2
10/21/2013 9 Acceptable 60.566 0.12 9.32 151.1 94.7
09/21/2013 8 Acceptable 70.664 0.12 4.67 24.7 94.9
08/19/2013 17 Acceptable 74.336 0.13 1.91 107.9 86.1
07/21/2013 20 Acceptable 82.634 0.11 1.01 24 89.3
06/24/2013 15 Acceptable 72.392 0.11 1.42 17.9 101.7
06/04/2013 345 Beach Advisory 69.368 0.09 0.94 22.6 93.4
10/15/2012 3 Acceptable 58.406 0.12 2.9 47.1 94.9
09/15/2012 9 Acceptable 73.886 0.13 3.14 52.5 94.1
08/18/2012 17 Acceptable 79.79 0.17 3.29 9.9 93.2
07/21/2012 1 Acceptable 81.284 0.17 6.51 17.4 102
06/16/2012 4 Acceptable 72.464 0.12 1.62 17.8 94.7
05/20/2012 19 Acceptable 64.436 0.1 n/a n/a 98.1
10/16/2011 1733 Beach Advisory 61.646 0.12 0.49 52.9 96.8
09/19/2011 14 Acceptable 66.308 0.11 0.78 39.8 98.2
08/21/2011 6 Acceptable 77.018 0.14 11.89 38.2 103.9
07/14/2011 10 Acceptable 78.368 0.09 7.98 18.5 154.9
07/02/2011 37 Acceptable 71.762 0.09 0.87 23.8 n/a
05/19/2011 260 Beach Advisory n/a n/a n/a n/a n/a
10/16/2010 116 Beach Advisory 55.778 0.09 1.56 16.3 95.5
09/14/2010 8 Acceptable 71.312 0.1 16.77 27.2 91.5
08/23/2010 10 Acceptable n/a n/a n/a n/a n/a
08/21/2010 3 Acceptable 78.26 0.13 6.27 n/a 105.4
07/19/2010 5 Acceptable 82.976 0.11 9.52 15.6 100.6
06/18/2010 14 Acceptable 70.538 0.14 25.84 42 100.5
05/25/2010 4 Acceptable 67.19 0.12 4.15 127.9 109.4
10/23/2009 8 Acceptable 50.522 0.11 0.89 36.3 92.3
09/17/2009 13 Acceptable 69.278 0.11 31.88 70 102.6
08/24/2009 2420 Beach Advisory 79.448 0.12 9.4 75 87.6
07/31/2009 1203 Beach Advisory 75.344 0.12 5.36 29.5 90.8
06/12/2009 6 Acceptable n/a n/a n/a n/a n/a
05/16/2009 1 Acceptable 62.3 0.08 1.54 14.7 100.7
05/15/2009 1 Acceptable 61.934 n/a 1.86 11 100.4
10/23/2008 10 Acceptable 54.518 0.13 18.9 41.6 93.6
09/17/2008 11 Acceptable n/a n/a n/a n/a n/a
08/09/2008 613 Beach Advisory n/a n/a n/a n/a n/a
07/17/2008 2 Acceptable 79.8 0.12 10.14 26.9 112.8

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:

Coxsackie, NY
A state park with camping, recreational boating and swimming is directly east of this sample site. It is a relatively undeveloped portion of the estuary.

Agencies Responsible:

Columbia County Dept. of Health: 518-828-3358, Greene County Dept. of Health: 518-719-3600 and NYSDEC Region 4: 518-357-2045

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