Water Quality
Water Quality > Hudson River Estuary Data > Orange County & Putnam County Sites > Little Stony Point

Little Stony Point

Little Stony Point copy
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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

97 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
08/22/2023 4 Acceptable 0.0 0.0 0.0 0.0 0.0
07/18/2023 517 Beach Advisory 0.0 0.0 1.1 0.1 1.2
06/27/2023 55 Acceptable 0.0 0.3 0.0 0.2 0.5
05/02/2023 91 Beach Advisory 0.0 0.1 0.1 0.6 0.8
10/11/2022 62 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/11/2022 96 Beach Advisory 0.0 0.0 0.0 0.1 0.2
08/20/2022 35 Acceptable 0.0 0.0 0.0 0.0 0.0
07/16/2022 23 Acceptable 0.0 0.1 0.0 0.0 0.1
06/14/2022 7 Acceptable 0.1 0.0 0.0 0.0 0.1
05/24/2022 10 Acceptable 0.0 0.5 0.0 0.1 0.6
10/29/2021 138 Beach Advisory 0.0 0.0 0.1 2.5 2.6
09/14/2021 11 Acceptable 0.0 0.0 0.0 0.0 0.0
08/17/2021 4 Acceptable 0.0 0.0 0.2 0.2 0.4
07/20/2021 46 Acceptable 0.0 0.0 2.3 2.2 4.5
06/08/2021 7 Acceptable 0.0 0.0 0.0 0.0 0.0
05/18/2021 <1 Acceptable 0.0 0.0 0.0 0.0 0.0
10/15/2020 163 Beach Advisory 0.0 0.0 0.5 0.2 0.7
09/19/2020 30 Acceptable 0.0 0.0 0.0 0.0 0.0
08/15/2020 11 Acceptable 0.0 0.0 0.0 0.3 0.3
07/15/2020 42 Acceptable 0.0 0.0 0.0 0.1 0.1
06/17/2020 10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/27/2020 2 Acceptable 0.0 0.0 0.0 0.0 0.0
10/09/2019 85 Beach Advisory 0.0 0.1 0.3 0.0 0.4
09/11/2019 32 Acceptable 0.0 0.0 0.0 0.0 0.0
08/07/2019 46 Acceptable 0.0 0.1 0.0 0.0 0.1
07/10/2019 4 Acceptable 0.0 0.0 0.0 0.0 0.0
06/06/2019 3 Acceptable 0.0 0.0 0.0 0.0 0.0
05/09/2019 5 Acceptable 0.0 0.0 0.3 0.0 0.3
10/11/2018 27 Acceptable 0.3 0.0 0.0 0.0 0.3
09/11/2018 56 Acceptable 0.0 0.1 0.0 0.0 0.1
08/15/2018 60 Acceptable 0.0 0.1 0.2 0.1 0.4
07/18/2018 21 Acceptable 0.0 1.1 0.0 0.0 1.1
06/14/2018 34 Acceptable 0.0 0.1 0.0 0.0 0.1
05/07/2018 4 Acceptable 0.0 0.1 0.0 0.0 0.1
10/17/2017 29 Acceptable 0.0 0.0 0.0 0.0 0.0
09/12/2017 17 Acceptable 0.0 0.0 0.0 0.0 0.0
08/15/2017 4 Acceptable 0.1 0.0 0.0 0.7 0.8
07/11/2017 8 Acceptable 0.2 0.0 0.0 0.0 0.2
06/13/2017 <1 Acceptable 0.0 0.0 0.0 0.0 0.0
05/16/2017 11 Acceptable 0.0 0.0 0.1 1.3 1.4
04/06/2017 11 Acceptable 0.5 0.0 0.7 0.0 1.2
10/16/2016 26 Acceptable 0.0 0.0 0.0 0.0 0.0
09/15/2016 51 Acceptable 0.0 0.0 0.0 0.0 0.0
08/16/2016 19 Acceptable 0.0 0.0 0.1 0.1 0.2
07/14/2016 3 Acceptable 0.0 0.0 0.0 0.0 0.0
06/16/2016 6 Acceptable 0.0 0.0 0.0 0.0 0.0
05/21/2016 1 Acceptable 0.0 0.0 0.0 0.0 0.0
10/13/2015 7 Acceptable 0.0 0.0 0.0 0.0 0.0
09/12/2015 8 Acceptable 0.0 0.1 0.9 0.0 1.0
08/13/2015 7 Acceptable 0.0 0.0 0.9 0.0 0.9
07/09/2015 3 Acceptable 0.0 0.0 0.1 0.0 0.1
06/12/2015 3 Acceptable 0.0 0.0 0.0 0.3 0.3
05/13/2015 1 Acceptable 0.0 0.0 0.0 0.0 0.0
10/14/2014 20 Acceptable 0.0 0.0 0.0 0.1 0.1
09/09/2014 1 Acceptable 0.0 0.0 0.0 0.1 0.1
08/13/2014 9 Acceptable 0.0 0.0 0.0 0.0 0.0
07/09/2014 11 Acceptable 0.0 0.1 0.2 0.0 0.3
06/14/2014 19 Acceptable 0.0 0.7 0.0 0.1 0.8
05/14/2014 8 Acceptable 0.0 0.0 0.0 0.0 0.0
10/18/2013 12 Acceptable 0.0 0.0 0.0 0.0 0.0
09/20/2013 7 Acceptable 0.0 0.0 0.0 0.0 0.0
08/17/2013 12 Acceptable 0.0 0.0 0.0 0.0 0.0
07/19/2013 15 Acceptable 0.0 0.1 0.0 0.0 0.1
06/21/2013 28 Acceptable 0.0 0.0 0.0 0.0 0.0
06/01/2013 8 Acceptable 0.0 0.0 0.0 0.0 0.0
10/13/2012 11 Acceptable 0.0 0.0 0.0 0.0 0.0
09/13/2012 16 Acceptable 0.0 0.0 0.0 0.0 0.0
08/15/2012 7 Acceptable 0.3 0.1 0.0 0.0 0.4
07/19/2012 9 Acceptable 0.0 0.2 0.0 0.0 0.2
06/14/2012 <1 Acceptable 0.0 0.2 0.3 0.0 0.5
05/18/2012 <1 Acceptable 0.0 0.0 0.0 0.3 0.3
10/18/2011 10 Acceptable 0.0 0.0 0.1 0.0 0.1
09/17/2011 53 Acceptable 0.0 0.0 0.1 0.0 0.1
08/18/2011 13 Acceptable 0.1 0.0 0.1 0.6 0.8
07/17/2011 <1 Acceptable 0.0 0.0 0.0 0.0 0.0
06/29/2011 6 Acceptable 0.5 0.0 0.0 0.0 0.5
05/18/2011 23 Acceptable 0.9 0.8 0.1 0.3 2.1
10/14/2010 25 Acceptable 0.0 0.0 0.3 0.1 0.4
09/13/2010 166 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/19/2010 1 Acceptable 0.0 0.0 0.0 1.0 1.0
07/20/2010 99 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/17/2010 6 Acceptable 0.0 0.0 0.0 0.0 0.0
05/23/2010 4 Acceptable 0.0 0.0 0.0 0.0 0.0
10/21/2009 16 Acceptable 0.0 0.0 0.0 0.2 0.2
09/16/2009 17 Acceptable 0.0 0.0 0.0 0.0 0.0
08/22/2009 10 Acceptable 0.3 0.3 0.0 0.0 0.6
08/03/2009 13 Acceptable 0.0 0.6 0.0 1.1 1.7
07/30/2009 4 Acceptable 0.0 0.3 0.0 0.2 0.5
06/09/2009 13 Acceptable 0.9 0.0 0.0 0.0 0.9
05/17/2009 5 Acceptable 0.7 0.2 0.0 0.6 1.5
05/14/2009 <1 Acceptable 0.1 0.0 0.0 0.0 0.1
10/22/2008 32 Acceptable 0.0 0.0 0.0 0.0 0.0
09/20/2008 3 Acceptable 0.0 0.0 0.0 0.0 0.0
08/06/2008 1 Acceptable 0.3 0.0 0.0 0.0 0.3
07/16/2008 <1 Acceptable 0.0 0.0 0.6 0.0 0.6
06/17/2008 13 Acceptable 0.0 0.2 0.0 0.1 0.3
05/21/2008 3 Acceptable 0.0 0.0 0.0 0.1 0.1

Entero Count (fecal indicator) and Rainfall Correlation

97 Samples taken

All Water Quality Parameters

97 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
08/22/2023 4 Acceptable 24.37 0.12 3.92 0.9 88.1
07/18/2023 517 Beach Advisory 25.97 0.12 5.29 21.5 87.3
06/27/2023 55 Acceptable 71.0 1.1 7.4 19.9 90.3
05/02/2023 91 Beach Advisory 55.5 0.1 3.0 15.3 92.7
10/11/2022 62 Beach Advisory 65 3.1 2.3 21.2 85.3
09/11/2022 96 Beach Advisory 77.3 2.8 3.2 17.8 79.1
08/20/2022 35 Acceptable 80.9 1.9 5.7 7.1 102
07/16/2022 23 Acceptable 77.8 1.9 2.7 24.4 84.7
06/14/2022 7 Acceptable 71.9 0.4 2.3 25.3 95.1
05/24/2022 10 Acceptable 63.4 0.3 1.6 27.7 n/a
10/29/2021 138 Beach Advisory 58.9 0.1 2.9 8 88
09/14/2021 11 Acceptable 72.8 0.1 6.7 13 83
08/17/2021 4 Acceptable 77.5 0.3 3.3 25 78
07/20/2021 46 Acceptable 75.9 0.1 4.5 19 76
06/08/2021 7 Acceptable 69.3 0.2 4.6 19 104
05/18/2021 <1 Acceptable 59.7 0.1 3.9 18 91
10/15/2020 163 Beach Advisory 66.9 3.7 3.4 12 91
09/19/2020 30 Acceptable 73.0 3.8 3.3 16 88
08/15/2020 11 Acceptable 82.8 1.0 4.9 10 94
07/15/2020 42 Acceptable 82.3 1.2 7.3 9 117
06/17/2020 10 Acceptable 73.3 1.1 2.7 12 99
05/27/2020 2 Acceptable 62.6 0.1 9.0 12 110
10/09/2019 85 Beach Advisory 66.8 1.1 3.3 13 91
09/11/2019 32 Acceptable 77.6 1.3 4.7 12 96
08/07/2019 46 Acceptable 81.2 1.1 2.8 12 80
07/10/2019 4 Acceptable 77.7 0.1 3.9 16 94
06/06/2019 3 Acceptable 67.2 0.1 5.6 16 97
05/09/2019 5 Acceptable 54.0 0.1 2.4 22 100
10/11/2018 27 Acceptable 66.9 0.1 4.0 24 89
09/11/2018 56 Acceptable 75.8 0.4 3.8 18 80
08/15/2018 60 Acceptable 80.6 0.1 3.3 15 83
07/18/2018 21 Acceptable 80.1 1.5 2.6 21 81
06/14/2018 34 Acceptable 70.4 1.0 3.6 27 96
05/07/2018 4 Acceptable 55.7 0.1 2.6 16 101
10/17/2017 29 Acceptable 69.3 2.6 2.6 20 86
09/12/2017 17 Acceptable 72.4 1.7 3.8 12 86
08/15/2017 4 Acceptable 77.3 0.3 4.5 17 88
07/11/2017 8 Acceptable 77.6 0.1 4.2 15 96
06/13/2017 <1 Acceptable 68.6 0.1 6.7 16 117
05/16/2017 11 Acceptable 57.5 0.1 3.5 24 96
04/06/2017 11 Acceptable 41.8 0.1 1.9 38 101
10/16/2016 26 Acceptable 66.9 4.8 1.5 51 88
09/15/2016 51 Acceptable 78.2 3.6 4.0 n/a 91
08/16/2016 19 Acceptable 83.0 1.2 3.4 41 88
07/14/2016 3 Acceptable 78.1 0.8 4.7 19 93
06/16/2016 6 Acceptable 70.1 0.6 5.1 30 95
05/21/2016 1 Acceptable 59.8 0.1 5.4 43 105
10/13/2015 7 Acceptable 67.4 1.9 3.8 44 89
09/12/2015 8 Acceptable 79.6 2.5 3.6 30 81
08/13/2015 7 Acceptable 79.0 1.0 4.3 26 88
07/09/2015 3 Acceptable 74.5 0.1 2.8 38 82
06/12/2015 3 Acceptable 71.2 0.1 3.7 7 97
05/13/2015 1 Acceptable 60.1 0.2 3.4 43 n/a
10/14/2014 20 Acceptable 66.2 1.6 1.7 52 90
09/09/2014 1 Acceptable 76.7 0.3 2.8 42 87
08/13/2014 9 Acceptable 77.8 0.5 2.3 38 87
07/09/2014 11 Acceptable 77.3 0.1 3.0 27 86
06/14/2014 19 Acceptable 69.2 0.3 3.7 52 87
05/14/2014 8 Acceptable 57.8 0.1 5.7 31 99
10/18/2013 12 Acceptable 66.6 1.6 2.6 72 90
09/20/2013 7 Acceptable 72.6 0.3 3.7 41 90
08/17/2013 12 Acceptable 77.1 0.1 2.4 65 83
07/19/2013 15 Acceptable 83.4 0.1 3.1 62 77
06/21/2013 28 Acceptable 66.0 0.1 5.0 108 95
06/01/2013 8 Acceptable 67.7 0.1 5.0 26 102
10/13/2012 11 Acceptable 64.5 0.7 5.2 37 89
09/13/2012 16 Acceptable 78.8 2.5 3.6 29 92
08/15/2012 7 Acceptable 81.4 2.0 2.7 17 92
07/19/2012 9 Acceptable 81.7 2.9 2.4 21 84
06/14/2012 <1 Acceptable 72.4 0.1 1.8 32 93
05/18/2012 <1 Acceptable 62.2 0.1 2.7 23 92
10/18/2011 10 Acceptable 61.4 0.1 1.5 114 90
09/17/2011 53 Acceptable 66.4 0.1 1.3 284 85
08/18/2011 13 Acceptable 79.5 0.3 1.6 42 83
07/17/2011 <1 Acceptable 79.3 0.1 3.7 n/a n/a
06/29/2011 6 Acceptable 75.8 0.1 4.7 38 88
05/18/2011 23 Acceptable n/a n/a n/a n/a n/a
10/14/2010 25 Acceptable 61.4 0.1 3.7 29 81
09/13/2010 166 Beach Advisory 74.2 0.8 5.3 20 84
08/19/2010 1 Acceptable 81.8 1.0 10.2 35 109
07/20/2010 99 Beach Advisory 82.3 1.1 2.8 15 85
06/17/2010 6 Acceptable 71.2 0.4 4.8 59 84
05/23/2010 4 Acceptable 63.6 0.2 6.2 41 99
10/21/2009 16 Acceptable 58.6 0.2 2.3 31 88
09/16/2009 17 Acceptable 73.3 0.6 3.1 21 83
08/22/2009 10 Acceptable 79.7 0.1 2.9 26 80
08/03/2009 13 Acceptable n/a n/a n/a n/a n/a
07/30/2009 4 Acceptable 77.0 0.1 3.6 41 89
06/09/2009 13 Acceptable n/a n/a n/a n/a n/a
05/17/2009 5 Acceptable n/a n/a n/a n/a n/a
05/14/2009 <1 Acceptable 59.4 0.1 7.1 28 107
10/22/2008 32 Acceptable 60.6 1.3 2.0 90 90
09/20/2008 3 Acceptable n/a n/a n/a n/a n/a
08/06/2008 1 Acceptable n/a n/a n/a n/a n/a
07/16/2008 <1 Acceptable 78.5 0.3 2.2 23 93
06/17/2008 13 Acceptable n/a n/a n/a n/a n/a
05/21/2008 3 Acceptable 56.8 0.1 3.0 48 93

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:

Cold Spring, NY
At Little Stony Point there is an unofficial swimming beach, as well as recreational boating, kayaking, and fishing.

Agencies Responsible:

Putnam County Dept. of Health: 845-278-6558 and NYSDEC Region 3: 914-428-2505

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