Water Quality
Water Quality > Hudson River Estuary Data > Albany County & Rensselaer County Sites > Congress St. Bridge- Troy

Congress St. Bridge- Troy

Congress Street 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 336 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/21/2023 517 Beach Advisory 0.0 0.0 0.0 1.3 1.3
08/24/2023 125 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/20/2023 1553 Beach Advisory 0.0 0.0 0.9 0.0 0.9
06/29/2023 250 Beach Advisory 0.0 0.1 0.2 1.2 1.6
05/04/2023 96 Beach Advisory 0.0 0.2 0.0 0.7 1.0
10/13/2022 1046 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/13/2022 602 Beach Advisory 0.1 0.0 0.0 0.0 0.1
08/22/2022 88 Beach Advisory 0.0 0.0 0.0 0.1 0.1
07/18/2022 77 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/16/2022 76 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/26/2022 197 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 866 Beach Advisory 0.2 0.8 0.0 0.8 1.8
08/19/2021 238 Beach Advisory 0.5 0.0 0.0 0.0 0.5
07/22/2021 411 Beach Advisory 0.0 0.5 0.3 0.1 0.9
06/10/2021 185 Beach Advisory 0.0 0.0 0.6 0.0 0.6
05/20/2021 38 Acceptable 0.0 0.0 0.0 0.0 0.0
10/17/2020 61 Beach Advisory 0.0 0.6 0.0 0.0 0.6
09/21/2020 30 Acceptable 0.0 0.0 0.0 0.0 0.0
08/17/2020 189 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/17/2020 96 Beach Advisory 0.4 0.1 0.0 0.1 0.5
06/19/2020 411 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/29/2020 135 Beach Advisory 0.5 0.0 0.0 0.0 0.5
10/11/2019 378 Beach Advisory 0.0 0.0 0.0 0.1 0.1
09/13/2019 181 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 104 Beach Advisory 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 58 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 101 Beach Advisory 0.0 0.1 0.1 0.9 1.1
08/17/2018 549 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/20/2018 270 Beach Advisory 0.0 0.0 0.0 0.4 0.4
06/16/2018 71 Beach Advisory 0.0 0.1 0.0 0.3 0.3
05/09/2018 22 Acceptable 0.0 0.0 0.0 0.3 0.3
10/19/2017 39 Acceptable 0.0 0.0 0.0 0.0 0.0
09/14/2017 88 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/17/2017 613 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/13/2017 55 Acceptable 0.2 0.1 0.1 0.0 0.3
06/15/2017 24 Acceptable 0.0 0.0 0.0 0.0 0.0
05/18/2017 4 Acceptable 0.0 0.0 0.0 0.3 0.3
04/07/2017 488 Beach Advisory 0.0 0.5 0.0 0.9 1.4
10/18/2016 45 Acceptable 0.0 0.0 0.0 0.0 0.0
09/17/2016 61 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/18/2016 39 Acceptable 0.0 0.0 0.2 0.0 0.2
07/16/2016 39 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 8 Acceptable 0.0 0.0 0.0 0.0 0.0
10/15/2015 49 Acceptable 0.0 0.0 0.0 0.0 0.0
09/14/2015 131 Beach Advisory 0.0 0.9 1.2 0.1 2.3
08/15/2015 33 Acceptable 0.3 0.3 0.0 0.0 0.6
07/11/2015 23 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 76 Beach Advisory 0.0 0.0 0.1 0.0 0.1
10/16/2014 1414 Beach Advisory 0.3 0.1 0.0 0.0 0.4
09/10/2014 16 Acceptable 0.0 0.0 0.0 0.0 0.0
08/14/2014 11 Acceptable 0.0 0.1 0.0 0.0 0.1
07/10/2014 260 Beach Advisory 0.0 1.7 0.4 0.3 2.3
06/15/2014 1553 Beach Advisory 0.0 0.5 0.5 0.1 1.0
05/15/2014 29 Acceptable 0.1 0.1 0.0 0.0 0.2
10/21/2013 36 Acceptable 0.0 0.0 0.0 0.2 0.2
09/21/2013 33 Acceptable 0.0 0.0 0.0 0.0 0.0
08/19/2013 108 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/21/2013 40 Acceptable 0.0 0.0 0.0 0.0 0.0
06/24/2013 411 Beach Advisory 1.4 0.0 0.0 0.0 1.4
06/04/2013 1300 Beach Advisory 0.0 0.0 1.1 0.1 1.1
10/15/2012 56 Acceptable 0.4 0.5 0.0 0.1 1.0
09/15/2012 61 Beach Advisory 0.1 0.0 0.0 0.0 0.1
08/18/2012 7 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 20 Acceptable 0.0 0.0 0.0 0.2 0.2
05/20/2012 24 Acceptable 0.0 0.0 0.0 0.0 0.0
10/16/2011 1414 Beach Advisory 0.0 0.1 1.1 0.3 1.6
09/19/2011 50 Acceptable 0.0 0.0 0.0 0.1 0.1
08/21/2011 435 Beach Advisory 0.4 0.0 0.0 0.0 0.4
07/14/2011 219 Beach Advisory 0.0 0.3 0.0 0.0 0.3
07/02/2011 17 Acceptable 0.0 0.0 1.0 1.1 2.1
05/19/2011 81 Beach Advisory 0.8 0.2 0.1 0.5 1.7
10/16/2010 525 Beach Advisory 0.0 1.0 0.3 0.0 1.3
09/14/2010 31 Acceptable 0.0 0.0 0.0 0.0 0.0
08/23/2010 727 Beach Advisory 0.1 0.4 0.0 0.1 0.5
08/21/2010 84 Beach Advisory 0.0 0.1 0.1 0.0 0.2
07/19/2010 50 Acceptable 0.0 0.2 0.5 0.0 0.7
06/18/2010 602 Beach Advisory 0.0 0.0 0.2 0.0 0.3
05/25/2010 28 Acceptable 0.0 0.0 0.0 0.0 0.0
10/23/2009 30 Acceptable 0.0 0.0 0.0 0.0 0.0
09/17/2009 96 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/24/2009 190 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 46 Acceptable 0.0 0.3 0.3 0.0 0.6
05/16/2009 18 Acceptable 0.0 0.0 0.5 0.0 0.5
05/15/2009 35 Acceptable 0.0 0.5 0.0 0.0 0.5
10/23/2008 7 Acceptable 0.0 0.2 0.1 0.0 0.2
09/18/2008 47 Acceptable 0.0 0.0 0.0 0.0 0.0
08/09/2008 26 Acceptable 0.0 0.0 1.3 0.2 1.5
07/17/2008 38 Acceptable 0.0 0.0 0.0 0.1 0.1
06/19/2008 56 Acceptable 0.0 0.4 0.1 0.9 1.4
05/22/2008 24 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 336 Beach Advisory 13.87 0.08 0.99 5.2 121.6
09/21/2023 517 Beach Advisory 19.12 0.1 1.66 n/a n/a
08/24/2023 125 Beach Advisory 22.16 0.06 2.03 1.6 104.6
07/20/2023 1553 Beach Advisory 24.08 0.09 1.03 16.5 102.6
06/29/2023 250 Beach Advisory 72.8 0.1 2.0 22.7 99.7
05/04/2023 96 Beach Advisory 50.7 0.1 2.7 32.3 106.5
10/13/2022 1046 Beach Advisory 59.5 0.1 2.9 5.3 94.5
09/13/2022 602 Beach Advisory 74.4 0.1 1.9 2.2 94.1
08/22/2022 88 Beach Advisory 79.3 0.1 2.3 0 98.9
07/18/2022 77 Beach Advisory 79.5 0.1 2 0.7 99.4
06/16/2022 76 Beach Advisory 73.2 0.1 1.7 5.2 94.7
05/26/2022 197 Beach Advisory 67.7 0.1 1.5 3.9 n/a
10/28/2021 >2420 Beach Advisory 54.032 0.08 3.65 232 105.8
09/16/2021 866 Beach Advisory 69.782 0.12 5.54 34.2 n/a
08/19/2021 238 Beach Advisory 76.928 0.11 4.3 15.3 101.1
07/22/2021 411 Beach Advisory 71.078 0.09 2.82 40.2 105.3
06/10/2021 185 Beach Advisory 75.488 0.12 2.73 6.2 95.4
05/20/2021 38 Acceptable 65.354 0.12 1.8 3.5 99.9
10/17/2020 61 Beach Advisory 59.756 0.13 1.55 2.9 97.1
09/21/2020 30 Acceptable 65.066 0.12 1.99 3.3 104
08/17/2020 189 Beach Advisory 81.536 0.12 5.01 3.4 116.3
07/17/2020 96 Beach Advisory 78.512 0.13 2.77 4.8 97.6
06/19/2020 411 Beach Advisory 79.934 0.13 6.56 4.5 119.5
05/29/2020 135 Beach Advisory 74.75 0.11 2.63 3.4 100.7
10/11/2019 378 Beach Advisory 60.26 0.11 1.87 3.9 100.6
09/13/2019 181 Beach Advisory 70.52 0.1 2.77 3.4 104.1
08/09/2019 >2420 Beach Advisory 78.89 0.14 2.99 10.2 99.2
07/12/2019 104 Beach Advisory 78.818 0.09 2.68 5 98.1
06/08/2019 27 Acceptable 66.668 0.07 2.72 5.8 107.8
05/11/2019 58 Acceptable 57.11 0.11 2.18 26.5 109.1
10/13/2018 >2420 Beach Advisory 61.97 0.12 2.11 19.6 103
09/13/2018 101 Beach Advisory 72.32 0.14 1.81 7.4 103.5
08/17/2018 549 Beach Advisory 78.08 0.12 2.56 6.6 99
07/20/2018 270 Beach Advisory 82.148 0.13 4.93 3.9 112.5
06/16/2018 71 Beach Advisory 72.014 0.11 6.68 4.9 106.1
05/09/2018 22 Acceptable 58.136 0.06 1.8 6.3 109.4
10/19/2017 39 Acceptable 61.772 0.12 2.08 4.7 100.8
09/14/2017 88 Beach Advisory 69.314 0.09 2.69 3.7 102
08/17/2017 613 Beach Advisory 76.478 0.11 1.99 4.5 98.3
07/13/2017 55 Acceptable 75.092 0.07 0.76 13.4 103.1
06/15/2017 24 Acceptable 72.446 0.08 1.64 20 105.9
05/18/2017 4 Acceptable 63.536 0.06 1.63 8.7 107.9
04/07/2017 488 Beach Advisory 40.838 0.07 0.1 226.3 107.7
10/18/2016 45 Acceptable 61.844 0.11 0.97 32.6 100.3
09/17/2016 61 Beach Advisory 73.184 0.1 1.27 n/a 98.9
08/18/2016 39 Acceptable 79.79 0.1 1.91 29.3 94.6
07/16/2016 39 Acceptable 80.456 0.1 2.22 11.7 95
06/18/2016 2 Acceptable 73.994 0.1 0.25 21.4 103.8
05/23/2016 8 Acceptable 64.418 0.1 0.16 21.9 101.5
10/15/2015 49 Acceptable 59.378 0.12 2.18 9 98.7
09/14/2015 131 Beach Advisory 74.48 0.13 1.46 20.7 90.6
08/15/2015 33 Acceptable 79.592 0.11 2.38 4.6 96.7
07/11/2015 23 Acceptable 74.894 0.09 2.11 9.8 107.1
06/13/2015 96 Beach Advisory 73.076 0.1 2.1 7.7 107.6
05/14/2015 76 Beach Advisory 67.136 0.09 1.79 10.7 106.7
10/16/2014 1414 Beach Advisory 63.536 0.11 2.15 26.5 101.1
09/10/2014 16 Acceptable 74.804 0.09 0.38 2.6 93.1
08/14/2014 11 Acceptable 75.668 0.1 1.46 4.4 89.7
07/10/2014 260 Beach Advisory 77 0.1 0.92 37.2 106.2
06/15/2014 1553 Beach Advisory 68.216 0.08 2.86 109.2 112
05/15/2014 29 Acceptable 62.51 0.08 0.87 14.2 108.8
10/21/2013 36 Acceptable 59.054 0.11 1.15 4.6 100.8
09/21/2013 33 Acceptable 66.884 0.12 2.88 23.3 100.8
08/19/2013 108 Beach Advisory 73.796 0.12 1.02 48.3 104
07/21/2013 40 Acceptable 81.41 0.08 2.6 20.8 106.6
06/24/2013 411 Beach Advisory 73.814 0.09 1.8 16.1 106.1
06/04/2013 1300 Beach Advisory 69.206 0.06 0.64 47.9 105
10/15/2012 56 Acceptable 57.002 0.14 1.72 10 102.3
09/15/2012 61 Beach Advisory 73.058 0.1 1.03 5.5 108.4
08/18/2012 7 Acceptable 79.142 0.14 2.4 4.4 114.1
07/21/2012 6 Acceptable 81.716 0.14 8.58 7.3 130.3
06/16/2012 20 Acceptable 74.264 0.12 1.47 15.4 109
05/20/2012 24 Acceptable 65.912 0.08 1.14 11.4 106.5
10/16/2011 1414 Beach Advisory 59.828 0.1 1.48 66.2 104.9
09/19/2011 50 Acceptable 64.634 0.1 0.83 28.5 103.6
08/21/2011 435 Beach Advisory 77.144 0.11 1.81 22.1 97.6
07/14/2011 219 Beach Advisory 77.144 0.08 4.73 6.2 102.9
07/02/2011 17 Acceptable 73.274 0.08 0.71 8.6 n/a
05/19/2011 81 Beach Advisory n/a n/a n/a n/a n/a
10/16/2010 525 Beach Advisory 54.446 0.09 2.12 42.1 102
09/14/2010 31 Acceptable 68.612 0.11 3.62 4 94.7
08/23/2010 727 Beach Advisory n/a n/a n/a n/a n/a
08/21/2010 84 Beach Advisory 77.396 0.12 1.72 n/a 94.3
07/19/2010 50 Acceptable 81.806 0.11 3.56 1.9 92.9
06/18/2010 602 Beach Advisory 70.682 0.12 3.15 4.9 101.4
05/25/2010 28 Acceptable 74.84 0.11 3.61 121.6 104.3
10/23/2009 30 Acceptable 50.324 0.1 0.4 15.8 98.5
09/17/2009 96 Beach Advisory 67.874 0.12 2.09 6.3 97.6
08/24/2009 190 Beach Advisory 77.396 0.12 1.55 65.5 103.4
07/31/2009 >2420 Beach Advisory 73.454 0.11 2.19 78.2 105.1
06/13/2009 46 Acceptable n/a n/a n/a n/a n/a
05/16/2009 18 Acceptable 62.4 0.07 0.6 6 98.8
05/15/2009 35 Acceptable 62.258 n/a 1.01 8 106
10/23/2008 7 Acceptable 52.286 0.11 1.3 0.5 97.1
09/18/2008 47 Acceptable n/a n/a n/a n/a n/a
08/09/2008 26 Acceptable n/a n/a n/a n/a n/a
07/17/2008 38 Acceptable 79.646 0.1 1.82 14.7 101.4
06/19/2008 56 Acceptable n/a n/a n/a n/a n/a
05/22/2008 24 Acceptable 58.712 0.11 6.41 6.6 104.6

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:

Troy, NY
This site has boating and kayaking as well as heavy recreational and subsistence fishing from boats and shore.

Agencies Responsible:

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

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