Hudson above Mohawk River

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

88 Samples taken

Sample Date [i] Enterococcus Count

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
08/22/2022 88 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/18/2022 63 Beach Advisory 0.1 0.0 0.0 0.0 0.1
06/16/2022 36 Acceptable 0.0 0.0 0.0 0.0 0.0
05/26/2022 30 Acceptable 0.0 0.0 0.0 0.0 0.0
10/28/2021 770 Beach Advisory 0.0 0.0 1.0 0.9 1.9
09/16/2021 2420 Beach Advisory 0.2 0.8 0.0 0.8 1.8
08/19/2021 122 Beach Advisory 0.5 0.0 0.0 0.0 0.5
07/22/2021 1533 Beach Advisory 0.0 0.5 0.3 0.1 0.9
06/10/2021 58 Acceptable 0.0 0.0 0.6 0.0 0.6
05/20/2021 8 Acceptable 0.0 0.0 0.0 0.0 0.0
10/17/2020 32 Acceptable 0.0 0.6 0.0 0.0 0.6
09/21/2020 17 Acceptable 0.0 0.0 0.0 0.0 0.0
08/17/2020 66 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/17/2020 62 Beach Advisory 0.4 0.1 0.0 0.1 0.5
06/19/2020 59 Acceptable 0.0 0.0 0.0 0.0 0.0
05/29/2020 46 Acceptable 0.5 0.0 0.0 0.0 0.5
10/11/2019 18 Acceptable 0.0 0.0 0.0 0.1 0.1
09/13/2019 34 Acceptable 0.0 0.0 0.0 0.0 0.0
08/09/2019 1414 Beach Advisory 0.0 0.8 0.1 0.4 1.3
07/12/2019 25 Acceptable 0.0 0.0 0.0 0.0 0.0
06/08/2019 27 Acceptable 0.0 0.0 0.6 0.5 1.1
05/11/2019 15 Acceptable 0.0 0.2 0.0 0.0 0.2
10/13/2018 >2420 Beach Advisory 0.3 0.0 1.3 0.0 1.6
09/13/2018 31 Acceptable 0.0 0.1 0.1 0.9 1.1
08/17/2018 104 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/20/2018 1986 Beach Advisory 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 15 Acceptable 0.0 0.0 0.0 0.3 0.3
10/19/2017 8 Acceptable 0.0 0.0 0.0 0.0 0.0
09/14/2017 19 Acceptable 0.0 0.0 0.0 0.0 0.0
08/17/2017 4 Acceptable 0.0 0.0 0.0 0.0 0.0
07/13/2017 71 Beach Advisory 0.2 0.1 0.1 0.0 0.3
06/15/2017 7 Acceptable 0.0 0.0 0.0 0.0 0.0
05/18/2017 6 Acceptable 0.0 0.0 0.0 0.3 0.3
04/07/2017 >2420 Beach Advisory 0.0 0.5 0.0 0.9 1.4
10/18/2016 5 Acceptable 0.0 0.0 0.0 0.0 0.0
09/17/2016 27 Acceptable 0.0 0.0 0.0 0.0 0.0
08/18/2016 30 Acceptable 0.0 0.0 0.2 0.0 0.2
07/16/2016 22 Acceptable 0.0 0.1 0.1 0.0 0.2
06/18/2016 7 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 10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/14/2015 81 Beach Advisory 0.0 0.9 1.2 0.1 2.3
08/15/2015 36 Acceptable 0.3 0.3 0.0 0.0 0.6
07/11/2015 14 Acceptable 0.0 0.0 1.2 0.0 1.2
06/13/2015 96 Beach Advisory 0.0 1.3 0.0 0.0 1.3
05/14/2015 1 Acceptable 0.0 0.0 0.1 0.0 0.1
10/16/2014 36 Acceptable 0.3 0.1 0.0 0.0 0.4
09/10/2014 15 Acceptable 0.0 0.0 0.0 0.0 0.0
08/14/2014 44 Acceptable 0.0 0.1 0.0 0.0 0.1
07/10/2014 132 Beach Advisory 0.0 1.7 0.4 0.3 2.3
06/15/2014 411 Beach Advisory 0.0 0.5 0.5 0.1 1.0
05/15/2014 12 Acceptable 0.1 0.1 0.0 0.0 0.2
10/21/2013 4 Acceptable 0.0 0.0 0.0 0.2 0.2
09/21/2013 20 Acceptable 0.0 0.0 0.0 0.0 0.0
08/19/2013 6 Acceptable 0.0 0.0 0.0 0.0 0.0
07/21/2013 31 Acceptable 0.0 0.0 0.0 0.0 0.0
06/24/2013 30 Acceptable 1.4 0.0 0.0 0.0 1.4
06/04/2013 238 Beach Advisory 0.0 0.0 1.1 0.1 1.1
10/15/2012 23 Acceptable 0.4 0.5 0.0 0.1 1.0
09/15/2012 11 Acceptable 0.1 0.0 0.0 0.0 0.1
08/18/2012 15 Acceptable 0.0 0.1 0.0 0.2 0.3
07/21/2012 6 Acceptable 0.0 0.0 0.0 0.2 0.2
06/16/2012 10 Acceptable 0.0 0.0 0.0 0.2 0.2
05/20/2012 11 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 11 Acceptable 0.0 0.0 0.0 0.1 0.1
08/21/2011 231 Beach Advisory 0.4 0.0 0.0 0.0 0.4
07/14/2011 11 Acceptable 0.0 0.3 0.0 0.0 0.3
07/02/2011 11 Acceptable 0.0 0.0 1.0 1.1 2.1
05/19/2011 91 Beach Advisory 0.8 0.2 0.1 0.5 1.7
10/16/2010 >2420 Beach Advisory 0.0 1.0 0.3 0.0 1.3
09/14/2010 15 Acceptable 0.0 0.0 0.0 0.0 0.0
08/21/2010 25 Acceptable 0.0 0.1 0.1 0.0 0.2
07/19/2010 31 Acceptable 0.0 0.2 0.5 0.0 0.7
06/18/2010 23 Acceptable 0.0 0.0 0.2 0.0 0.3
05/25/2010 <1 Acceptable 0.0 0.0 0.0 0.0 0.0
10/23/2009 4 Acceptable 0.0 0.0 0.0 0.0 0.0
09/17/2009 28 Acceptable 0.0 0.0 0.0 0.0 0.0
08/24/2009 276 Beach Advisory 0.0 0.3 1.0 1.5 2.8
07/31/2009 >2420 Beach Advisory 0.6 0.3 1.0 0.0 1.9
05/15/2009 6 Acceptable 0.0 0.5 0.0 0.0 0.5
10/23/2008 <1 Acceptable 0.0 0.2 0.1 0.0 0.2
09/18/2008 6 Acceptable 0.0 0.0 0.0 0.0 0.0
08/09/2008 41 Acceptable 0.0 0.0 1.3 0.2 1.5
07/17/2008 15 Acceptable 0.0 0.0 0.0 0.1 0.1
06/19/2008 12 Acceptable 0.0 0.4 0.1 0.9 1.4
05/22/2008 12 Acceptable 0.2 0.0 0.0 0.0 0.2

Entero Count (fecal indicator) and Rainfall Correlation

88 Samples taken

All Water Quality Parameters

88 Samples taken

Sample Date [i] Entero Count

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)

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

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

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

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

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
08/22/2022 88 Beach Advisory 79.4 0.1 4.1 1.9 103.3
07/18/2022 63 Beach Advisory 80 0.1 4.5 2.3 105.7
06/16/2022 36 Acceptable 73.5 0.1 2.7 5.1 104.6
05/26/2022 30 Acceptable 32 0.1 2.9 5.1 102
10/28/2021 770 Beach Advisory 53.492 0.06 2.71 21.9 102.7
09/16/2021 2420 Beach Advisory 69.188 0.07 2.08 45.6 100.8
08/19/2021 122 Beach Advisory 76.388 0.07 2.6 5.3 100.1
07/22/2021 1533 Beach Advisory 69.404 0.06 3.11 27.7 105
06/10/2021 58 Acceptable 75.848 0.11 3.17 3.2 102
05/20/2021 8 Acceptable 66.272 0.11 2.78 6.4 102.9
10/17/2020 32 Acceptable 59.018 0.11 2.03 1.8 100.5
09/21/2020 17 Acceptable 64.886 0.08 2.17 3.4 107.8
08/17/2020 66 Beach Advisory 81.032 0.11 5.91 4 120.2
07/17/2020 62 Beach Advisory 79.61 0.13 3.03 5.6 109.2
06/19/2020 59 Acceptable 79.268 0.09 8.14 4.9 119.5
05/29/2020 46 Acceptable 76.118 0.08 3.78 4.8 115.3
10/11/2019 18 Acceptable 61.412 0.08 2.24 3.8 90.9
09/13/2019 34 Acceptable 70.052 0.07 2.95 3.9 105.4
08/09/2019 1414 Beach Advisory 79.718 0.09 3.59 15.5 101.6
07/12/2019 25 Acceptable 78.512 0.07 3.74 5.5 103.8
06/08/2019 27 Acceptable 66.956 0.05 2.87 8.4 109.3
05/11/2019 15 Acceptable 56.156 0.06 2.13 13.1 109.3
10/13/2018 >2420 Beach Advisory 62.168 0.09 2.23 15.6 98.3
09/13/2018 31 Acceptable 71.15 0.1 2.28 5.7 101.5
08/17/2018 104 Beach Advisory 78.368 0.11 3.65 6.6 104.5
07/20/2018 1986 Beach Advisory 81.698 0.11 6.85 4.4 114.7
06/16/2018 6 Acceptable 73.688 0.11 8.09 4.9 117.2
05/09/2018 15 Acceptable 57.74 0.05 2.06 5.9 110.5
10/19/2017 8 Acceptable 62.006 0.09 3.05 4.2 102.9
09/14/2017 19 Acceptable 69.476 0.06 2.82 3.5 106.5
08/17/2017 4 Acceptable 77.936 0.09 3.11 5.4 112.1
07/13/2017 71 Beach Advisory 74.732 0.05 0.8 24 103.6
06/15/2017 7 Acceptable 72.662 0.05 2.03 14.8 106.4
05/18/2017 6 Acceptable 63.752 0.05 2 18.6 109.5
04/07/2017 >2420 Beach Advisory n/a n/a n/a n/a n/a
10/18/2016 5 Acceptable 61.718 0.09 1.66 32.8 99.4
09/17/2016 27 Acceptable 73.022 0.07 1.87 n/a 103.1
08/18/2016 30 Acceptable 80.132 0.09 2.85 27.1 107
07/16/2016 22 Acceptable 81.014 0.07 3.75 24.6 103.4
06/18/2016 7 Acceptable 74.516 0.08 0.39 15.3 114.4
05/23/2016 1 Acceptable 66.632 0.08 0.2 20.2 107.2
10/15/2015 10 Acceptable 59.09 0.09 3.01 7.9 103
09/14/2015 81 Beach Advisory 74.156 0.1 2.31 8.2 95.4
08/15/2015 36 Acceptable 78.764 0.11 3.56 12 104.9
07/11/2015 14 Acceptable 75.434 0.06 3.24 21.2 107.1
06/13/2015 96 Beach Advisory 72.77 0.05 2.58 5 106.5
05/14/2015 1 Acceptable 66.812 0.06 2.63 13.1 105.7
10/16/2014 36 Acceptable 63.5 0.09 5.11 14.1 100.6
09/10/2014 15 Acceptable 75.434 0.08 0.48 13.2 104.1
08/14/2014 44 Acceptable 75.614 0.07 2.76 8 102.6
07/10/2014 132 Beach Advisory 76.064 0.08 1.05 54.4 103.3
06/15/2014 411 Beach Advisory 69.134 0.05 1.9 37.9 108.9
05/15/2014 12 Acceptable 61.988 0.05 1.08 11.6 108.7
10/21/2013 4 Acceptable 59.306 0.1 1.54 100.3 104.2
09/21/2013 20 Acceptable 67.118 0.11 3.16 23.9 106.1
08/19/2013 6 Acceptable 73.778 0.08 1.02 50.3 106.3
07/21/2013 31 Acceptable 81.104 0.05 2.24 21.8 103.6
06/24/2013 30 Acceptable 73.31 0.07 1.86 16 104.4
06/04/2013 238 Beach Advisory 68.828 0.06 0.55 45.1 103.1
10/15/2012 23 Acceptable 56.462 0.09 1.72 10.4 100.4
09/15/2012 11 Acceptable 72.536 0.08 0.94 5.8 109.9
08/18/2012 15 Acceptable 79.34 0.11 1.37 4.8 113.5
07/21/2012 6 Acceptable 81.698 0.12 6.08 11.1 123.5
06/16/2012 10 Acceptable 74.102 0.08 1.64 14.8 108.2
05/20/2012 11 Acceptable 66.686 0.07 0.96 13.7 108.2
10/16/2011 1733 Beach Advisory 59.9 0.07 1.71 26.2 101.9
09/19/2011 11 Acceptable 64.868 0.07 0.86 7.4 104.1
08/21/2011 231 Beach Advisory 77.306 0.17 1.53 25.6 94.1
07/14/2011 11 Acceptable 77.018 0.06 6.14 8.3 n/a
07/02/2011 11 Acceptable 73.832 0.05 0.73 6.6 n/a
05/19/2011 91 Beach Advisory n/a n/a n/a n/a n/a
10/16/2010 >2420 Beach Advisory 54.032 0.07 1.9 50.9 101.7
09/14/2010 15 Acceptable 69.35 0.09 6.1 3.8 101.4
08/21/2010 25 Acceptable 78.008 0.09 2.62 n/a 106.2
07/19/2010 31 Acceptable 81.266 0.09 7.95 4.8 92.3
06/18/2010 23 Acceptable 70.196 0.08 7 6.2 103
05/25/2010 <1 Acceptable 74.066 0.09 7.04 154.3 111.5
10/23/2009 4 Acceptable 50.558 0.08 0.37 19 100.3
09/17/2009 28 Acceptable 68 0.09 2.24 5.6 104.2
08/24/2009 276 Beach Advisory 76.388 0.09 2.04 56.5 102.8
07/31/2009 >2420 Beach Advisory 72.284 0.08 2.27 106.7 102.8
05/15/2009 6 Acceptable 62.294 n/a 1.22 5.6 108.3
10/23/2008 <1 Acceptable 52.07 0.08 1.31 0.4 98.7
09/18/2008 6 Acceptable n/a n/a n/a n/a n/a
08/09/2008 41 Acceptable n/a n/a n/a n/a n/a
07/17/2008 15 Acceptable 80.312 0.08 2.1 13.3 109.9
06/19/2008 12 Acceptable n/a n/a n/a n/a n/a
05/22/2008 12 Acceptable 58.262 0.09 2.47 3.2 104.3

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:

Waterford, NY
This site has boating, kayaking and fishing. The Waterford drinking water intake is in the vicinity.

Agencies Responsible:

Rensselaer County Dept. of Health: 518-270-2655, Saratoga County Dept. of Health: 518-584-7460 and NYSDEC Region 4: 518-357-2045

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