Water Quality
Water Quality > Hudson River Estuary Data > Ulster County & Dutchess County Sites > Marlboro Landing

Marlboro Landing

Marlboro Landing
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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

95 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
10/17/2023 12 Acceptable 0.0 0.0 0.0 0.2 0.2
09/19/2023 135 Beach Advisory 0.0 1.6 0.0 0.0 1.7
08/22/2023 <1 Acceptable 0.0 0.0 0.0 0.0 0.0
07/18/2023 69 Beach Advisory 0.0 0.0 1.1 0.1 1.2
06/27/2023 46 Acceptable 0.0 0.3 0.0 0.2 0.5
05/02/2023 23 Acceptable 0.0 0.1 0.1 0.6 0.8
10/11/2022 73 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/11/2022 73 Beach Advisory 0.0 0.0 0.0 0.1 0.2
08/20/2022 34 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 1 Acceptable 0.1 0.0 0.0 0.0 0.1
05/24/2022 12 Acceptable 0.0 0.5 0.0 0.1 0.6
10/29/2021 1300 Beach Advisory 0.0 0.0 0.1 2.5 2.6
09/14/2021 20 Acceptable 0.0 0.0 0.0 0.0 0.0
08/17/2021 45 Acceptable 0.0 0.0 0.2 0.2 0.4
07/20/2021 25 Acceptable 0.0 0.0 2.3 2.2 4.5
06/08/2021 3 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 22 Acceptable 0.0 0.0 0.5 0.2 0.7
09/19/2020 14 Acceptable 0.0 0.0 0.0 0.0 0.0
08/15/2020 33 Acceptable 0.0 0.0 0.0 0.3 0.3
07/15/2020 12 Acceptable 0.0 0.0 0.0 0.1 0.1
06/17/2020 20 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 13 Acceptable 0.0 0.1 0.3 0.0 0.4
09/11/2019 115 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/07/2019 23 Acceptable 0.0 0.1 0.0 0.0 0.1
07/10/2019 7 Acceptable 0.0 0.0 0.0 0.0 0.0
06/06/2019 11 Acceptable 0.0 0.0 0.0 0.0 0.0
05/09/2019 12 Acceptable 0.0 0.0 0.3 0.0 0.3
10/11/2018 436 Beach Advisory 0.3 0.0 0.0 0.0 0.3
09/11/2018 50 Acceptable 0.0 0.1 0.0 0.0 0.1
08/15/2018 37 Acceptable 0.0 0.1 0.2 0.1 0.4
07/18/2018 25 Acceptable 0.0 1.1 0.0 0.0 1.1
06/14/2018 8 Acceptable 0.0 0.1 0.0 0.0 0.1
05/07/2018 2 Acceptable 0.0 0.1 0.0 0.0 0.1
10/17/2017 13 Acceptable 0.0 0.0 0.0 0.0 0.0
09/12/2017 4 Acceptable 0.0 0.0 0.0 0.0 0.0
08/15/2017 7 Acceptable 0.1 0.0 0.0 0.7 0.8
07/11/2017 17 Acceptable 0.2 0.0 0.0 0.0 0.2
06/13/2017 2 Acceptable 0.4 0.0 0.0 0.0 0.4
05/16/2017 4 Acceptable 0.0 0.0 0.1 1.3 1.4
10/16/2016 39 Acceptable 0.0 0.0 0.0 0.0 0.0
09/15/2016 16 Acceptable 0.0 0.0 0.0 0.0 0.0
08/16/2016 36 Acceptable 0.0 0.0 0.1 0.1 0.2
07/14/2016 4 Acceptable 0.0 0.0 0.0 0.0 0.0
06/16/2016 16 Acceptable 0.0 0.0 0.0 0.0 0.0
05/21/2016 5 Acceptable 0.0 0.0 0.0 0.0 0.0
10/13/2015 8 Acceptable 0.0 0.0 0.0 0.0 0.0
09/12/2015 17 Acceptable 0.6 0.1 0.9 0.0 1.6
08/13/2015 4 Acceptable 0.0 0.0 0.9 0.0 0.9
07/09/2015 6 Acceptable 0.0 0.0 0.1 0.0 0.1
06/12/2015 4 Acceptable 0.0 0.0 0.0 0.3 0.3
05/13/2015 3 Acceptable 0.0 0.0 0.0 0.0 0.0
10/14/2014 3 Acceptable 0.0 0.0 0.0 0.1 0.1
09/09/2014 6 Acceptable 0.0 0.0 0.0 0.1 0.1
08/13/2014 18 Acceptable 0.0 0.0 0.0 0.0 0.0
07/09/2014 20 Acceptable 0.0 0.1 0.2 0.0 0.3
06/14/2014 57 Acceptable 0.0 0.7 0.0 0.1 0.8
05/14/2014 22 Acceptable 0.0 0.0 0.0 0.0 0.0
10/19/2013 9 Acceptable 0.0 0.0 0.0 0.0 0.0
09/20/2013 2 Acceptable 0.0 0.0 0.0 0.0 0.0
08/17/2013 7 Acceptable 0.0 0.0 0.0 0.0 0.0
07/19/2013 16 Acceptable 0.0 0.1 0.0 0.0 0.1
06/22/2013 26 Acceptable 0.0 0.0 0.0 0.0 0.0
06/02/2013 5 Acceptable 0.0 0.0 0.0 0.0 0.0
10/14/2012 33 Acceptable 0.0 0.0 0.0 0.0 0.0
09/13/2012 13 Acceptable 0.0 0.0 0.0 0.0 0.0
08/16/2012 1 Acceptable 0.0 0.3 0.1 0.0 0.4
07/19/2012 7 Acceptable 0.0 0.2 0.0 0.0 0.2
06/14/2012 7 Acceptable 0.0 0.2 0.3 0.0 0.5
05/18/2012 2 Acceptable 0.0 0.0 0.0 0.3 0.3
10/18/2011 17 Acceptable 0.0 0.0 0.1 0.0 0.1
09/17/2011 26 Acceptable 0.0 0.0 0.1 0.0 0.1
08/19/2011 10 Acceptable 0.0 0.1 0.0 0.1 0.2
07/17/2011 2 Acceptable 0.0 0.0 0.0 0.0 0.0
06/30/2011 12 Acceptable 0.0 0.5 0.0 0.0 0.5
05/18/2011 32 Acceptable 0.9 0.8 0.1 0.3 2.1
10/15/2010 >2420 Beach Advisory 0.4 0.8 0.0 0.3 1.5
09/13/2010 4 Acceptable 0.0 0.0 0.0 0.0 0.0
08/20/2010 7 Acceptable 0.0 0.0 0.0 0.0 0.0
07/20/2010 22 Acceptable 0.0 0.0 0.0 0.0 0.0
06/17/2010 15 Acceptable 0.0 0.0 0.0 0.0 0.0
05/24/2010 5 Acceptable 0.0 0.0 0.0 0.0 0.0
10/21/2009 5 Acceptable 0.0 0.0 0.0 0.2 0.2
09/16/2009 2 Acceptable 0.0 0.0 0.0 0.0 0.0
08/23/2009 11 Acceptable 0.3 0.3 0.0 0.0 0.6
07/30/2009 77 Beach Advisory 0.0 0.3 0.0 0.2 0.5
06/09/2009 116 Beach Advisory 0.9 0.0 0.0 0.0 0.9
05/14/2009 2 Acceptable 0.1 0.0 0.0 0.0 0.1
10/22/2008 2 Acceptable 0.0 0.0 0.0 0.0 0.0
09/20/2008 2 Acceptable 0.0 0.0 0.0 0.0 0.0
08/06/2008 38 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 24 Acceptable 0.0 0.2 0.0 0.1 0.3

Entero Count (fecal indicator) and Rainfall Correlation

95 Samples taken

All Water Quality Parameters

95 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
10/17/2023 12 Acceptable 16.71 0.12 1.9 13.2 101.9
09/19/2023 135 Beach Advisory 23.89 0.11 3.15 n/a n/a
08/22/2023 <1 Acceptable 24.45 0.11 2.77 0 87.7
07/18/2023 69 Beach Advisory 26.19 0.12 5.31 19 86.7
06/27/2023 46 Acceptable 71.3 0.1 3.6 17.5 81.5
05/02/2023 23 Acceptable 55.2 0.1 2.4 12.3 97.9
10/11/2022 73 Beach Advisory 65.6 0.2 2.9 16 91
09/11/2022 73 Beach Advisory 77.2 0.7 2.4 14 76.5
08/20/2022 34 Acceptable 81 0.3 3.5 16.7 88.7
07/16/2022 23 Acceptable 78.7 0.2 4 16.2 90.9
06/14/2022 1 Acceptable 73.1 0.1 1.9 17.6 88.6
05/24/2022 12 Acceptable 64.3 0.1 2 21.9 90.9
10/29/2021 1300 Beach Advisory 57.1 0.1 2.7 8 90
09/14/2021 20 Acceptable 72.7 0.1 4.5 13 80
08/17/2021 45 Acceptable 77.5 0.1 3.5 12 83
07/20/2021 25 Acceptable 75.8 0.1 2.7 12 80
06/08/2021 3 Acceptable 73.4 0.1 2.0 12 102
05/18/2021 1 Acceptable 61.3 0.1 2.2 13 100
10/15/2020 22 Acceptable 65.8 0.5 3.6 13 90
09/19/2020 14 Acceptable 72.5 1.1 2.9 9 88
08/15/2020 33 Acceptable 82.5 0.2 4.9 7 104
07/15/2020 12 Acceptable 80.5 0.2 2.8 7 87
06/17/2020 20 Acceptable 73.3 0.1 2.8 7 99
05/27/2020 2 Acceptable 63.4 0.1 6.0 9 116
10/09/2019 13 Acceptable 67.0 0.2 2.4 6 88
09/11/2019 115 Beach Advisory 76.5 0.2 3.7 6 96
08/07/2019 23 Acceptable 81.6 0.1 3.5 9 82
07/10/2019 7 Acceptable 78.2 0.1 3.5 10 95
06/06/2019 11 Acceptable 68.5 0.1 4.1 11 98
05/09/2019 12 Acceptable 54.2 0.1 2.0 11 103
10/11/2018 436 Beach Advisory 65.8 0.1 3.2 12 87
09/11/2018 50 Acceptable 75.1 0.1 4.9 11 84
08/15/2018 37 Acceptable 82.8 0.1 2.6 8 97
07/18/2018 25 Acceptable 80.0 0.2 2.3 13 87
06/14/2018 8 Acceptable 71.2 0.1 3.2 17 97
05/07/2018 2 Acceptable 55.0 0.1 2.4 10 104
10/17/2017 13 Acceptable 68.6 0.3 2.6 10 86
09/12/2017 4 Acceptable 73.0 0.1 4.1 8 87
08/15/2017 7 Acceptable 77.7 0.1 5.2 11 93
07/11/2017 17 Acceptable 77.7 0.1 4.2 10 92
06/13/2017 2 Acceptable 67.5 0.1 5.1 12 111
05/16/2017 4 Acceptable 57.0 0.1 2.5 17 100
10/16/2016 39 Acceptable 67.0 1.1 3.4 45 92
09/15/2016 16 Acceptable 78.1 0.5 3.6 n/a 87
08/16/2016 36 Acceptable 83.3 0.1 3.6 25 101
07/14/2016 4 Acceptable 78.6 0.1 6.4 11 91
06/16/2016 16 Acceptable 73.5 0.1 2.9 21 97
05/21/2016 5 Acceptable 60.0 0.1 2.3 24 99
10/13/2015 8 Acceptable 65.6 0.1 5.5 21 89
09/12/2015 17 Acceptable 78.8 0.3 4.3 19 85
08/13/2015 4 Acceptable 79.6 0.1 4.4 13 93
07/09/2015 6 Acceptable 73.7 0.1 1.8 20 77
06/12/2015 4 Acceptable 74.2 0.1 2.5 6 89
05/13/2015 3 Acceptable 59.5 0.1 3.3 23 103
10/14/2014 3 Acceptable 66.7 0.2 0.8 31 87
09/09/2014 6 Acceptable 76.3 0.1 3.0 16 86
08/13/2014 18 Acceptable 78.2 0.1 3.9 25 89
07/09/2014 20 Acceptable 77.9 0.1 2.1 33 82
06/14/2014 57 Acceptable 69.6 0.1 3.9 35 87
05/14/2014 22 Acceptable 59.7 0.1 3.3 16 104
10/19/2013 9 Acceptable 65.3 0.2 3.0 24 90
09/20/2013 2 Acceptable 73.9 0.1 3.3 41 91
08/17/2013 7 Acceptable 78.2 0.1 2.1 127 82
07/19/2013 16 Acceptable 81.6 0.1 2.3 50 75
06/22/2013 26 Acceptable 67.8 0.1 2.4 85 97
06/02/2013 5 Acceptable 66.6 0.1 7.0 66 99
10/14/2012 33 Acceptable 63.2 0.1 2.9 16 85
09/13/2012 13 Acceptable 78.4 0.2 4.2 132 95
08/16/2012 1 Acceptable 82.1 0.2 1.4 6 94
07/19/2012 7 Acceptable 82.2 0.2 2.6 21 90
06/14/2012 7 Acceptable 73.3 0.1 1.6 21 87
05/18/2012 2 Acceptable 63.7 0.1 2.4 27 95
10/18/2011 17 Acceptable 61.0 0.1 0.4 83 89
09/17/2011 26 Acceptable 68.9 0.1 1.4 243 87
08/19/2011 10 Acceptable n/a n/a n/a n/a n/a
07/17/2011 2 Acceptable 78.6 0.1 4.5 13 n/a
06/30/2011 12 Acceptable 73.9 0.1 2.1 8 84
05/18/2011 32 Acceptable n/a n/a n/a n/a n/a
10/15/2010 >2420 Beach Advisory 59.2 0.1 3.0 26 81
09/13/2010 4 Acceptable 75.1 0.1 4.4 14 85
08/20/2010 7 Acceptable 80.1 0.2 4.7 10 83
07/20/2010 22 Acceptable 81.5 0.2 2.7 10 81
06/17/2010 15 Acceptable 73.1 0.1 2.7 21 75
05/24/2010 5 Acceptable 62.9 0.1 3.5 21 90
10/21/2009 5 Acceptable 58.5 0.1 2.0 19 87
09/16/2009 2 Acceptable 72.7 0.1 3.8 16 91
08/23/2009 11 Acceptable 78.2 0.1 2.8 23 81
07/30/2009 77 Beach Advisory 76.8 0.1 2.4 19 88
06/09/2009 116 Beach Advisory n/a n/a n/a n/a n/a
05/14/2009 2 Acceptable 61.1 0.1 5.5 16 109
10/22/2008 2 Acceptable 61.2 0.1 4.0 14 92
09/20/2008 2 Acceptable n/a n/a n/a n/a n/a
08/06/2008 38 Acceptable n/a n/a n/a n/a n/a
07/16/2008 1 Acceptable 79.9 0.1 1.3 16 93
06/17/2008 24 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:

Marlboro, NY
The landing at Marlboro has a marina, as well as kayaking, fishing, and swimming from boats. There is a tributary in close proximity.

Agencies Responsible:

Ulster County Dept. of Health: 845-340-3010 and NYSDEC Region 3: 845-256-3000

Tell Gov. Hochul to block invasive species at the Erie and Champlain canals
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