Water Quality
Water Quality > Hudson River Estuary Data > Ulster County & Dutchess County Sites > Norrie Point mid-channel

Norrie Point mid-channel

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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

80 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
05/20/2021 7 Acceptable 0.0 0.0 0.0 0.0 0.0
10/16/2020 3 Acceptable 0.7 0.0 0.0 0.5 1.1
09/20/2020 4 Acceptable 0.0 0.0 0.0 0.0 0.0
08/16/2020 4 Acceptable 0.0 0.0 0.0 0.0 0.0
07/16/2020 1 Acceptable 0.0 0.0 0.0 0.0 0.0
06/18/2020 2 Acceptable 0.0 0.0 0.0 0.0 0.0
05/28/2020 1 Acceptable 0.0 0.0 0.0 0.0 0.0
10/10/2019 2 Acceptable 0.0 0.1 0.1 0.3 0.5
09/12/2019 4 Acceptable 0.0 0.0 0.0 0.0 0.0
08/08/2019 6 Acceptable 0.0 0.0 0.1 0.0 0.1
07/11/2019 <1 Acceptable 0.0 0.0 0.0 0.0 0.0
06/07/2019 2 Acceptable 0.0 0.0 0.0 0.0 0.0
05/10/2019 4 Acceptable 0.0 0.0 0.0 0.3 0.3
10/12/2018 105 Beach Advisory 0.0 0.3 0.0 0.0 0.3
09/12/2018 5 Acceptable 0.0 0.0 0.1 0.0 0.1
08/16/2018 28 Acceptable 0.0 0.0 0.1 0.2 0.3
07/19/2018 <1 Acceptable 0.0 0.0 1.1 0.0 1.1
06/15/2018 2 Acceptable 0.0 0.0 0.1 0.0 0.1
05/08/2018 1 Acceptable 0.0 0.0 0.1 0.0 0.1
10/18/2017 2 Acceptable 0.0 0.0 0.0 0.0 0.0
09/13/2017 1 Acceptable 0.0 0.0 0.0 0.0 0.0
08/16/2017 2 Acceptable 0.0 0.1 0.0 0.0 0.1
07/12/2017 3 Acceptable 0.0 0.2 0.0 0.0 0.2
06/14/2017 <1 Acceptable 0.0 0.4 0.0 0.0 0.4
05/17/2017 <1 Acceptable 0.0 0.0 0.0 0.1 0.1
04/06/2017 44 Acceptable 0.5 0.0 0.7 0.0 1.2
10/17/2016 <1 Acceptable 0.0 0.0 0.0 0.0 0.0
09/16/2016 1 Acceptable 0.0 0.0 0.0 0.0 0.0
08/17/2016 6 Acceptable 0.1 0.1 0.0 0.1 0.3
07/15/2016 <1 Acceptable 0.0 0.0 0.0 0.0 0.0
06/17/2016 2 Acceptable 0.0 0.0 0.0 0.0 0.0
05/22/2016 <1 Acceptable 0.0 0.0 0.0 0.0 0.0
10/14/2015 2 Acceptable 0.0 0.0 0.0 0.0 0.0
09/13/2015 1 Acceptable 0.1 0.6 0.1 0.9 1.7
08/14/2015 <1 Acceptable 0.0 0.0 0.0 0.9 0.9
07/10/2015 <1 Acceptable 0.0 0.1 0.0 0.1 0.2
06/12/2015 1 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
10/15/2014 1 Acceptable 0.0 0.0 0.0 0.0 0.0
09/09/2014 1 Acceptable 0.0 0.0 0.0 0.1 0.1
08/13/2014 4 Acceptable 0.0 0.0 0.0 0.0 0.0
07/09/2014 3 Acceptable 0.0 0.1 0.2 0.0 0.3
06/14/2014 7 Acceptable 0.0 0.1 0.0 0.1 0.2
05/14/2014 <1 Acceptable 0.0 0.0 0.0 0.0 0.0
10/19/2013 1 Acceptable 0.0 0.0 0.0 0.0 0.0
09/20/2013 1 Acceptable 0.0 0.0 0.0 0.0 0.0
08/18/2013 3 Acceptable 0.0 0.0 0.0 0.0 0.0
07/20/2013 3 Acceptable 0.0 0.0 0.1 0.0 0.1
06/22/2013 18 Acceptable 0.0 0.0 0.0 0.0 0.0
06/02/2013 8 Acceptable 0.0 0.0 0.0 0.0 0.0
10/14/2012 2 Acceptable 0.0 0.0 0.0 0.0 0.0
09/13/2012 11 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
07/20/2012 4 Acceptable 0.4 0.0 0.2 0.0 0.6
06/14/2012 2 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 106 Beach Advisory 0.0 0.0 0.1 0.0 0.1
09/17/2011 17 Acceptable 0.0 0.0 0.1 0.0 0.1
08/19/2011 12 Acceptable 0.0 0.1 0.0 0.1 0.2
07/16/2011 2 Acceptable 0.0 0.0 0.0 0.0 0.0
06/30/2011 6 Acceptable 0.0 0.5 0.0 0.0 0.5
05/18/2011 119 Beach Advisory 0.9 0.8 0.1 0.3 2.1
10/15/2010 17 Acceptable 0.4 0.8 0.0 0.3 1.5
09/13/2010 5 Acceptable 0.0 0.0 0.0 0.0 0.0
08/20/2010 3 Acceptable 0.0 0.0 0.0 0.0 0.0
07/20/2010 1 Acceptable 0.0 0.0 0.0 0.0 0.0
06/17/2010 2 Acceptable 0.0 0.0 0.0 0.0 0.0
05/24/2010 1 Acceptable 0.0 0.0 0.0 0.0 0.0
10/22/2009 <1 Acceptable 0.0 0.0 0.0 0.0 0.0
09/16/2009 2 Acceptable 0.0 0.0 0.0 0.0 0.0
08/23/2009 10 Acceptable 0.0 0.3 0.3 0.0 0.6
07/30/2009 1203 Beach Advisory 0.0 0.3 0.0 0.2 0.5
06/10/2009 1 Acceptable 0.0 0.9 0.0 0.0 0.9
05/14/2009 3 Acceptable 0.1 0.0 0.0 0.0 0.1
10/22/2008 4 Acceptable 0.0 0.0 0.0 0.0 0.0
09/15/2008 <1 Acceptable 0.0 0.2 0.1 0.4 0.7
08/07/2008 1 Acceptable 0.0 0.3 0.0 0.0 0.3
07/16/2008 1 Acceptable 0.0 0.0 0.6 0.0 0.6
06/17/2008 1 Acceptable 0.0 0.2 0.0 0.1 0.3
05/21/2008 1 Acceptable 0.0 0.0 0.0 0.1 0.1

Entero Count (fecal indicator) and Rainfall Correlation

80 Samples taken

All Water Quality Parameters

80 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
05/20/2021 7 Acceptable 62.9 0.1 10.3 10.5 121.2
10/16/2020 3 Acceptable 62.6 0.2 5.3 8.8 93.6
09/20/2020 4 Acceptable 69.3 0.2 4.2 9.3 91.7
08/16/2020 4 Acceptable 80.9 0.1 4.8 6.6 92.8
07/16/2020 1 Acceptable 80.5 0.1 3.1 8.1 88.1
06/18/2020 2 Acceptable 74.4 0.1 5.1 6.9 100.2
05/28/2020 1 Acceptable 65 0.1 3.1 8 121.7
10/10/2019 2 Acceptable 63.8 0.1 2.8 4 90
09/12/2019 4 Acceptable 73.1 0.1 5.1 5 93
08/08/2019 6 Acceptable 80.4 0.1 5 7 85
07/11/2019 <1 Acceptable 79.2 0.1 6.2 10 100
06/07/2019 2 Acceptable 68.2 0.1 4.3 13 98
05/10/2019 4 Acceptable 53.6 0.1 2.2 9 100
10/12/2018 105 Beach Advisory 64.5 0.1 2.7 13 90
09/12/2018 5 Acceptable 73.9 0.1 4.5 7 84
08/16/2018 28 Acceptable 78.1 0.1 3.1 8 77
07/19/2018 <1 Acceptable 79.6 0.1 2.3 7 83
06/15/2018 2 Acceptable 70.4 0.1 2.9 9 91
05/08/2018 1 Acceptable 54.8 0.1 2.9 8 103
10/18/2017 2 Acceptable 65.4 0.1 3 11 89
09/13/2017 1 Acceptable 70.2 0.1 5.1 7 90
08/16/2017 2 Acceptable 76.5 0.1 7.8 12 101
07/12/2017 3 Acceptable 76.4 0.1 2.9 21 82
06/14/2017 <1 Acceptable 66.8 0.1 5.6 9 102
05/17/2017 <1 Acceptable 56.1 0.1 2.5 13 99
04/06/2017 44 Acceptable 42.3 0.1 1.6 76 102
10/17/2016 <1 Acceptable 62.9 0.1 4.7 35 93
09/16/2016 1 Acceptable 75.5 0.1 4.2 n/a 86
08/17/2016 6 Acceptable 81.5 0.1 4.1 23 89
07/15/2016 <1 Acceptable 78.1 0.1 5 3 90
06/17/2016 2 Acceptable 72.1 0.1 4.3 20 95
05/22/2016 <1 Acceptable 61 0.1 3.1 29 108
10/14/2015 2 Acceptable 61.8 0.1 5 29 87
09/13/2015 1 Acceptable 77.9 0.1 5.2 17 87
08/14/2015 <1 Acceptable 77.9 0.1 6.1 9 93
07/10/2015 <1 Acceptable 73.4 0.1 2.5 13 85
06/12/2015 1 Acceptable 73.1 0.1 5.3 3 103
05/13/2015 1 Acceptable 64 0.1 4.4 32 n/a
10/15/2014 1 Acceptable 64.8 0.1 3.1 18 90
09/09/2014 1 Acceptable 76.4 0.1 2.7 16 87
08/13/2014 4 Acceptable 78.2 0.1 1.8 21 85
07/09/2014 3 Acceptable 77.5 0.1 2.8 24 92
06/14/2014 7 Acceptable 71.9 0.1 5.4 21 103
05/14/2014 <1 Acceptable 59.2 0.1 4.9 23 104
10/19/2013 1 Acceptable 64.1 0.1 2.7 21 92
09/20/2013 1 Acceptable 71.7 0.1 3.7 13 91
08/18/2013 3 Acceptable 75.5 0.1 2.5 28 82
07/20/2013 3 Acceptable 81.9 0.1 2.7 42 74
06/22/2013 18 Acceptable 67.8 0.1 2.5 108 95
06/02/2013 8 Acceptable 66.2 0.1 7.2 36 105
10/14/2012 2 Acceptable 61 0.1 2.4 28 88
09/13/2012 11 Acceptable 76.2 0.1 4.4 76 97
08/16/2012 <1 Acceptable 82.2 0.2 2.1 9 97
07/20/2012 4 Acceptable 80.5 0.1 2 23 83
06/14/2012 2 Acceptable 73.4 0.2 3 20 96
05/18/2012 2 Acceptable 63.8 0.1 3.1 43 95
10/18/2011 106 Beach Advisory 59.8 0.1 0.5 61 92
09/17/2011 17 Acceptable 67.6 0.1 1.3 167 87
08/19/2011 12 Acceptable 77.1 0.1 n/a 55 95
07/16/2011 2 Acceptable 78.9 0.1 3.5 21 n/a
06/30/2011 6 Acceptable 74.7 0.1 3.3 16 92
05/18/2011 119 Beach Advisory n/a n/a n/a n/a n/a
10/15/2010 17 Acceptable 58.2 0.1 2.8 24 86
09/13/2010 5 Acceptable 73 0.1 7.8 12 85
08/20/2010 3 Acceptable 79.3 0.1 7.6 9 90
07/20/2010 1 Acceptable 81.6 0.1 3.7 8 77
06/17/2010 2 Acceptable 72.7 0.1 6.9 16 85
05/24/2010 1 Acceptable 64.7 0.1 3.4 13 95
10/22/2009 <1 Acceptable 54.2 0.1 1.5 27 97
09/16/2009 2 Acceptable 70.8 0.1 4.4 16 91
08/23/2009 10 Acceptable 79.9 0.1 4.8 19 93
07/30/2009 1203 Beach Advisory 76.8 0.1 4.3 25 102
06/10/2009 1 Acceptable n/a n/a n/a n/a n/a
05/14/2009 3 Acceptable 61.9 0.1 11.2 19 108
10/22/2008 4 Acceptable 58 0.1 10.3 13 101
09/15/2008 <1 Acceptable n/a n/a n/a n/a n/a
08/07/2008 1 Acceptable n/a n/a n/a n/a n/a
07/16/2008 1 Acceptable 81.5 0.1 2.6 25 109
06/17/2008 1 Acceptable n/a n/a n/a n/a n/a
05/21/2008 1 Acceptable 58.4 0.1 2.7 20 97

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:

Esopus, NY
This deep water site has boating, kayaking and fishing.

Agencies Responsible:

Ulster County Dept. of Health: 845-340-3010, Dutchess County Dept. of Health: 845-486-3400 and NYSDEC Region 3: 845-256-3000

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