Water Quality
Water Quality > Hudson River Estuary Data > Albany County & Rensselaer County Sites > Dunn Memorial Bridge- Albany

Dunn Memorial Bridge- Albany

Dunn Memorial Bridge
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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

99 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 326 Beach Advisory 0.0 0.0 0.0 1.3 1.3
08/24/2023 25 Acceptable 0.0 0.0 0.0 0.0 0.0
07/20/2023 816 Beach Advisory 0.0 0.0 0.9 0.0 0.9
06/29/2023 164 Beach Advisory 0.0 0.1 0.2 1.2 1.6
05/04/2023 109 Beach Advisory 0.0 0.2 0.0 0.7 1.0
10/13/2022 921 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/13/2022 208 Beach Advisory 0.1 0.0 0.0 0.0 0.1
08/22/2022 30 Acceptable 0.0 0.0 0.0 0.1 0.1
07/18/2022 17 Acceptable 0.0 0.0 0.0 0.0 0.0
06/16/2022 19 Acceptable 0.0 0.0 0.0 0.0 0.0
05/26/2022 81 Beach Advisory 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 488 Beach Advisory 0.2 0.8 0.0 0.8 1.8
08/19/2021 68 Beach Advisory 0.5 0.0 0.0 0.0 0.5
07/22/2021 727 Beach Advisory 0.0 0.5 0.3 0.1 0.9
06/10/2021 19 Acceptable 0.0 0.0 0.6 0.0 0.6
05/20/2021 4 Acceptable 0.0 0.0 0.0 0.0 0.0
10/17/2020 58 Acceptable 0.0 0.6 0.0 0.0 0.6
09/21/2020 13 Acceptable 0.0 0.0 0.0 0.0 0.0
08/17/2020 59 Acceptable 0.0 0.0 0.0 0.0 0.0
07/17/2020 184 Beach Advisory 0.4 0.1 0.0 0.1 0.5
06/19/2020 19 Acceptable 0.0 0.0 0.0 0.0 0.0
05/29/2020 19 Acceptable 0.0 0.0 0.0 0.0 0.0
10/11/2019 54 Acceptable 0.0 0.0 0.0 0.1 0.1
09/13/2019 98 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/09/2019 >2420 Beach Advisory 0.0 0.8 0.1 0.4 1.3
07/12/2019 36 Acceptable 0.0 0.0 0.0 0.0 0.0
06/08/2019 55 Acceptable 0.0 0.0 0.6 0.5 1.1
05/11/2019 63 Beach Advisory 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 98 Beach Advisory 0.0 0.1 0.1 0.9 1.1
08/17/2018 33 Acceptable 0.0 0.0 0.0 0.0 0.0
07/20/2018 30 Acceptable 0.0 0.0 0.0 0.4 0.4
06/16/2018 19 Acceptable 0.0 0.1 0.0 0.3 0.3
05/09/2018 16 Acceptable 0.0 0.0 0.0 0.3 0.3
10/19/2017 24 Acceptable 0.0 0.0 0.0 0.0 0.0
09/14/2017 69 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/17/2017 13 Acceptable 0.0 0.0 0.0 0.0 0.0
07/13/2017 26 Acceptable 0.2 0.1 0.1 0.0 0.3
06/15/2017 34 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 344 Beach Advisory 0.0 0.5 0.0 0.9 1.4
10/18/2016 6 Acceptable 0.0 0.0 0.0 0.0 0.0
09/17/2016 5 Acceptable 0.0 0.0 0.0 0.0 0.0
08/18/2016 50 Acceptable 0.0 0.0 0.2 0.0 0.2
07/16/2016 31 Acceptable 0.0 0.1 0.1 0.0 0.2
06/18/2016 2 Acceptable 0.0 0.0 0.0 0.0 0.0
05/23/2016 3 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 1300 Beach Advisory 0.0 0.9 1.2 0.1 2.3
08/15/2015 6 Acceptable 0.3 0.3 0.0 0.0 0.6
07/11/2015 58 Acceptable 0.0 0.0 1.2 0.0 1.2
06/13/2015 980 Beach Advisory 0.0 1.3 0.0 0.0 1.3
05/14/2015 13 Acceptable 0.0 0.0 0.1 0.0 0.1
10/16/2014 128 Beach Advisory 0.3 0.1 0.0 0.0 0.4
09/10/2014 36 Acceptable 0.0 0.0 0.0 0.0 0.0
08/14/2014 25 Acceptable 0.0 0.1 0.0 0.0 0.1
07/10/2014 727 Beach Advisory 0.0 1.7 0.4 0.3 2.3
06/15/2014 1733 Beach Advisory 0.0 0.5 0.5 0.1 1.0
05/15/2014 10 Acceptable 0.1 0.1 0.0 0.0 0.2
10/21/2013 134 Beach Advisory 0.0 0.0 0.0 0.2 0.2
09/21/2013 46 Acceptable 0.0 0.0 0.0 0.0 0.0
08/19/2013 29 Acceptable 0.0 0.0 0.0 0.0 0.0
07/21/2013 19 Acceptable 0.0 0.0 0.0 0.0 0.0
06/24/2013 1553 Beach Advisory 1.4 0.0 0.0 0.0 1.4
06/04/2013 1553 Beach Advisory 0.0 0.0 1.1 0.1 1.1
10/15/2012 411 Beach Advisory 0.4 0.5 0.0 0.1 1.0
09/15/2012 211 Beach Advisory 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 3 Acceptable 0.0 0.0 0.0 0.2 0.2
06/16/2012 17 Acceptable 0.0 0.0 0.0 0.2 0.2
05/20/2012 187 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/16/2011 >2420 Beach Advisory 0.0 0.1 1.1 0.3 1.6
09/19/2011 687 Beach Advisory 0.0 0.0 0.0 0.1 0.1
08/21/2011 34 Acceptable 0.4 0.0 0.0 0.0 0.4
07/14/2011 76 Beach Advisory 0.0 0.3 0.0 0.0 0.3
07/02/2011 84 Beach Advisory 0.0 0.0 1.0 1.1 2.1
05/19/2011 770 Beach Advisory 0.8 0.2 0.1 0.5 1.7
10/16/2010 488 Beach Advisory 0.0 1.0 0.3 0.0 1.3
09/14/2010 88 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/23/2010 488 Beach Advisory 0.1 0.4 0.0 0.1 0.5
08/21/2010 25 Acceptable 0.0 0.1 0.1 0.0 0.2
07/19/2010 179 Beach Advisory 0.0 0.2 0.5 0.0 0.7
06/18/2010 135 Beach Advisory 0.0 0.0 0.2 0.0 0.3
05/25/2010 980 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/23/2009 49 Acceptable 0.0 0.0 0.0 0.0 0.0
09/17/2009 43 Acceptable 0.0 0.0 0.0 0.0 0.0
08/24/2009 76 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
06/13/2009 32 Acceptable 0.0 0.3 0.3 0.0 0.6
05/16/2009 84 Beach Advisory 0.0 0.0 0.5 0.0 0.5
05/15/2009 88 Beach Advisory 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
09/18/2008 50 Acceptable 0.0 0.0 0.0 0.0 0.0
08/09/2008 20 Acceptable 0.0 0.0 1.3 0.2 1.5
07/17/2008 6 Acceptable 0.0 0.0 0.0 0.1 0.1
06/19/2008 59 Acceptable 0.0 0.4 0.1 0.9 1.4
05/22/2008 32 Acceptable 0.2 0.0 0.0 0.0 0.2

Entero Count (fecal indicator) and Rainfall Correlation

99 Samples taken

All Water Quality Parameters

99 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 13.93 0.07 0.97 4.4 121.7
09/21/2023 326 Beach Advisory 19.3 0.11 1.65 n/a n/a
08/24/2023 25 Acceptable 22.83 0.09 1.82 1.8 103.2
07/20/2023 816 Beach Advisory 24.83 0.08 1.83 15.2 100.1
06/29/2023 164 Beach Advisory 74.6 0.1 1.6 9.5 92.7
05/04/2023 109 Beach Advisory 51.1 0.1 2.8 38.5 103.2
10/13/2022 921 Beach Advisory 59.6 0.1 2 2.5 98.5
09/13/2022 208 Beach Advisory 74.3 0.1 2.1 2 93.5
08/22/2022 30 Acceptable 79.4 0.1 2.6 0.5 89.5
07/18/2022 17 Acceptable 79 0.1 2 1.7 94.2
06/16/2022 19 Acceptable 73.4 0.1 1.5 6 94.5
05/26/2022 81 Beach Advisory 68.6 0.1 1.3 3.2 n/a
10/28/2021 >2420 Beach Advisory 54.086 0.08 3.62 187.8 106.2
09/16/2021 488 Beach Advisory 70.178 0.11 1.58 20.7 n/a
08/19/2021 68 Beach Advisory 77.216 0.1 2.16 4.7 100.4
07/22/2021 727 Beach Advisory 70.61 0.09 2.67 46.6 106.3
06/10/2021 19 Acceptable 76.064 0.13 2.49 6.5 94.2
05/20/2021 4 Acceptable 66.29 0.12 2.32 4.4 97.9
10/17/2020 58 Acceptable 59.684 0.12 1.6 4.2 94.8
09/21/2020 13 Acceptable 66.182 0.12 3.07 3.4 98.6
08/17/2020 59 Acceptable 81.788 0.13 3.49 3.8 100.4
07/17/2020 184 Beach Advisory 80.708 0.14 2.18 6 96.1
06/19/2020 19 Acceptable 76.982 0.15 5.6 5.5 108
05/29/2020 19 Acceptable 74.21 0.11 2.91 4.2 100.2
10/11/2019 54 Acceptable 60.35 0.12 1.74 3.9 102.7
09/13/2019 98 Beach Advisory 71.6 0.13 2.41 3.9 99.6
08/09/2019 >2420 Beach Advisory 80.42 0.13 5.21 4.7 100.4
07/12/2019 36 Acceptable 79.916 0.09 2.45 7.3 95.2
06/08/2019 55 Acceptable 67.082 0.08 2.19 10.3 104.5
05/11/2019 63 Beach Advisory 55.706 0.09 2.03 9.8 105.3
10/13/2018 >2420 Beach Advisory 61.862 0.12 2.07 21.5 102
09/13/2018 98 Beach Advisory 72.302 0.14 1.79 7.8 101.4
08/17/2018 33 Acceptable 78.314 0.12 2.24 7 96
07/20/2018 30 Acceptable 82.472 0.13 4.23 4.9 91.9
06/16/2018 19 Acceptable 71.816 0.12 4.97 5.4 99.8
05/09/2018 16 Acceptable 60.44 0.06 1.62 5.1 110.2
10/19/2017 24 Acceptable 61.916 0.12 1.88 5.8 98.4
09/14/2017 69 Beach Advisory 69.89 0.1 4.48 4 102.3
08/17/2017 13 Acceptable 77.792 0.12 2.88 6 98.7
07/13/2017 26 Acceptable 76.064 0.07 0.72 15.3 99.8
06/15/2017 34 Acceptable 72.734 0.07 1.57 11.7 101.5
05/18/2017 6 Acceptable 61.826 0.07 1.42 10 107.2
04/07/2017 344 Beach Advisory 40.838 0.07 0.11 216.5 107
10/18/2016 6 Acceptable 61.124 0.11 0.81 36.3 99.2
09/17/2016 5 Acceptable 73.688 0.1 1.63 n/a 92.9
08/18/2016 50 Acceptable 82.436 0.12 1.91 29 89.1
07/16/2016 31 Acceptable 80.798 0.11 1.71 10.8 91.4
06/18/2016 2 Acceptable 73.472 0.11 0.14 18 97.4
05/23/2016 3 Acceptable 63.752 0.1 0.16 24.6 96.7
10/15/2015 10 Acceptable 65.39 0.13 2.09 6.7 85.5
09/14/2015 1300 Beach Advisory 75.686 0.13 1.51 11.7 87.5
08/15/2015 6 Acceptable 78.782 0.11 2.05 5.1 94
07/11/2015 58 Acceptable 75.272 0.09 2.17 7.2 103.2
06/13/2015 980 Beach Advisory 72.482 0.09 1.89 7.9 100.4
05/14/2015 13 Acceptable 66.74 0.1 0.63 13.9 n/a
10/16/2014 128 Beach Advisory 62.978 0.11 2.14 11.5 97
09/10/2014 36 Acceptable 76.91 0.13 0.36 14.4 89.8
08/14/2014 25 Acceptable 75.956 0.13 1.03 6.2 90.1
07/10/2014 727 Beach Advisory 75.92 0.11 1.3 74.8 102.8
06/15/2014 1733 Beach Advisory 67.874 0.09 2.8 94.8 108.3
05/15/2014 10 Acceptable 62.816 0.09 0.79 11 103.2
10/21/2013 134 Beach Advisory 59.828 0.13 1.23 8.5 97.8
09/21/2013 46 Acceptable 68.594 0.14 2.87 23.8 99
08/19/2013 29 Acceptable 73.868 0.12 1.04 23 102
07/21/2013 19 Acceptable 81.878 0.09 3.22 20.2 103.5
06/24/2013 1553 Beach Advisory 77.666 0.11 1.46 17.4 102.5
06/04/2013 1553 Beach Advisory 68.63 0.07 0.62 45 100.4
10/15/2012 411 Beach Advisory 57.128 0.12 1.23 3.9 100.8
09/15/2012 211 Beach Advisory 72.914 0.14 1.13 3.6 100.1
08/18/2012 17 Acceptable 80.402 0.15 1.52 5.1 99.1
07/21/2012 3 Acceptable 83.246 0.16 5.72 7.1 103.5
06/16/2012 17 Acceptable 74.174 0.12 1.72 13 104.5
05/20/2012 187 Beach Advisory 67.37 0.1 0.64 17 102.1
10/16/2011 >2420 Beach Advisory 59.99 0.11 1.1 59.2 101.7
09/19/2011 687 Beach Advisory 64.85 0.11 0.77 32.2 102
08/21/2011 34 Acceptable 76.568 0.1 1.66 49.8 93.7
07/14/2011 76 Beach Advisory 78.818 0.07 4.27 8.7 49.8
07/02/2011 84 Beach Advisory 73.454 0.09 0.55 7.3 n/a
05/19/2011 770 Beach Advisory n/a n/a n/a n/a n/a
10/16/2010 488 Beach Advisory 54.59 0.09 0.43 27.9 100.8
09/14/2010 88 Beach Advisory 69.71 0.12 3.95 3.9 93.1
08/23/2010 488 Beach Advisory n/a n/a n/a n/a n/a
08/21/2010 25 Acceptable 78.278 0.12 1.83 n/a 92.5
07/19/2010 179 Beach Advisory 82.13 0.11 3.2 3.1 82.8
06/18/2010 135 Beach Advisory 70.142 0.13 2.93 6 96.1
05/25/2010 980 Beach Advisory 71.726 0.12 4.14 233.2 98.4
10/23/2009 49 Acceptable 51.044 0.11 0.3 23.4 99.1
09/17/2009 43 Acceptable 69.89 0.13 2.08 4.4 97.8
08/24/2009 76 Beach Advisory 77.864 0.11 1.63 63.4 99.9
07/31/2009 >2420 Beach Advisory 73.148 0.11 2.16 19.1 101.4
06/13/2009 32 Acceptable n/a n/a n/a n/a n/a
05/16/2009 84 Beach Advisory 62.4 0.08 0.74 6.9 102.2
05/15/2009 88 Beach Advisory 61.664 n/a 0.92 6.1 104.1
10/23/2008 10 Acceptable 53.618 0.13 1.23 4.9 93.7
09/18/2008 50 Acceptable n/a n/a n/a n/a n/a
08/09/2008 20 Acceptable n/a n/a n/a n/a n/a
07/17/2008 6 Acceptable 79.988 0.12 2.89 16.6 104.1
06/19/2008 59 Acceptable n/a n/a n/a n/a n/a
05/22/2008 32 Acceptable 59.18 0.12 5.98 6.2 102.1

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:

Albany, NY
In the heart of the port of Albany, contact includes kayaking, team rowing, and swimming from recreational boats. The site also has fishing from shore and from boats.

The data displayed on these pages relates to the levels of sewage indicating microbes. Even though the levels on a single days can fall within acceptable levels for Enterococcus, these locations are not necessarily acceptable for swimming. Other water quality parameters not reported on this web site such as chemical contamination and floatables should cause users to exercise caution at this site.

Agencies Responsible:

Albany County Dept. of Health: 518-447-4580, Rensselear County Dept. of Health: 518-270-2655, and NYSDEC Region 4: 518-357-2045

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