Water Quality
Water Quality > Hudson River Estuary Data > Rockland County & Westchester County Sites > Irvington Beach

Irvington Beach

Irvington Beach
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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

98 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
10/16/2023 <10 Acceptable 0.0 0.0 0.6 0.0 0.6
09/18/2023 934 Beach Advisory 1.0 0.2 0.1 0.0 1.3
08/21/2023 20 Acceptable 0.0 0.0 0.0 1.3 1.3
07/17/2023 20 Acceptable 0.0 1.4 0.2 1.0 2.6
06/26/2023 <10 Acceptable 1.6 0.0 0.3 0.2 2.0
05/01/2023 336 Beach Advisory 0.2 2.2 1.6 0.1 4.1
10/10/2022 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/10/2022 <10 Acceptable 0.0 0.0 0.0 2.1 2.1
08/12/2022 <10 Acceptable 0.0 0.0 0.1 0.0 0.1
07/15/2022 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/13/2022 195 Beach Advisory 0.0 0.0 0.0 1.4 1.4
05/23/2022 20 Acceptable 0.0 0.0 0.0 0.2 0.2
10/25/2021 10 Acceptable 0.0 0.1 0.0 0.0 0.1
09/13/2021 41 Acceptable 0.0 0.0 0.0 0.0 0.0
08/16/2021 <10 Acceptable 0.0 0.0 0.1 0.0 0.1
07/19/2021 <10 Acceptable 0.1 0.3 0.9 0.0 1.2
06/07/2021 <10 Acceptable 0.0 0.0 0.0 0.1 0.1
05/17/2021 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/14/2020 10 Acceptable 0.0 0.3 0.3 0.0 0.6
09/18/2020 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/14/2020 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/14/2020 <10 Acceptable 0.0 0.0 0.0 2.2 2.2
06/16/2020 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/26/2020 30 Acceptable 0.0 0.0 0.0 0.2 0.2
10/08/2019 20 Acceptable 0.1 0.2 0.0 0.0 0.3
09/10/2019 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/06/2019 20 Acceptable 0.0 0.0 0.2 0.9 1.1
07/09/2019 <10 Acceptable 0.0 0.0 0.0 0.6 0.6
06/04/2019 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/07/2019 <10 Acceptable 0.0 0.1 1.1 0.1 1.3
10/10/2018 10 Acceptable 0.0 0.0 0.1 0.0 0.1
09/10/2018 41 Acceptable 1.7 0.1 0.1 0.0 1.9
08/14/2018 30 Acceptable 0.0 0.8 0.2 1.9 2.8
07/17/2018 41 Acceptable 1.6 0.1 0.3 0.5 2.5
06/13/2018 10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/06/2018 10 Acceptable 0.2 0.0 0.0 0.3 0.5
10/16/2017 <10 Acceptable 0.1 0.0 0.0 0.0 0.2
09/11/2017 20 Acceptable 0.0 0.0 0.0 0.0 0.0
08/14/2017 <10 Acceptable 0.0 0.0 0.4 0.3 0.8
07/10/2017 <10 Acceptable 0.0 0.0 0.0 2.2 2.2
06/12/2017 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/15/2017 10 Acceptable 0.0 0.1 1.7 0.0 1.8
04/04/2017 74 Beach Advisory 1.1 0.0 0.0 0.1 1.2
10/13/2016 10 Acceptable 0.1 0.0 0.0 0.0 0.1
09/14/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/15/2016 10 Acceptable 0.0 0.1 0.1 0.2 0.4
07/13/2016 10 Acceptable 0.0 0.0 0.0 0.0 0.1
06/15/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/20/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/12/2015 <10 Acceptable 0.0 0.0 0.0 0.1 0.1
09/11/2015 20 Acceptable 0.3 1.3 0.1 0.0 1.7
08/12/2015 10 Acceptable 0.0 1.0 0.0 0.0 1.0
07/08/2015 <10 Acceptable 0.0 0.1 0.0 0.0 0.1
06/11/2015 <10 Acceptable 0.0 0.0 0.2 0.2 0.3
05/12/2015 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/13/2014 <10 Acceptable 0.0 0.0 0.4 0.0 0.4
09/08/2014 10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/12/2014 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/08/2014 <10 Acceptable 0.2 0.0 0.0 0.0 0.2
06/13/2014 10 Acceptable 1.4 0.0 0.1 0.0 1.5
05/13/2014 10 Acceptable 0.0 0.0 0.1 0.3 0.3
10/17/2013 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/19/2013 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/15/2013 10 Acceptable 0.0 0.0 0.7 0.4 1.1
07/18/2013 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/20/2013 10 Acceptable 0.0 0.0 0.3 0.2 0.5
05/30/2013 20 Acceptable 0.0 0.0 0.4 0.0 0.4
10/11/2012 <10 Acceptable 0.0 0.1 0.0 0.0 0.1
09/11/2012 <10 Acceptable 0.0 0.0 0.0 1.4 1.4
08/14/2012 10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/17/2012 <10 Acceptable 0.0 0.0 0.2 0.0 0.2
06/12/2012 10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/16/2012 <10 Acceptable 0.1 0.4 0.1 0.0 0.5
10/20/2011 52 Acceptable 0.0 0.1 0.0 0.0 0.1
09/15/2011 464 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/17/2011 <10 Acceptable 0.0 0.0 0.0 3.4 3.4
07/18/2011 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/28/2011 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/17/2011 120 Beach Advisory 1.2 0.0 0.8 0.0 2.0
10/13/2010 <10 Acceptable 0.0 0.1 0.3 0.0 0.3
09/12/2010 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/18/2010 10 Acceptable 0.0 0.0 0.2 0.3 0.5
07/22/2010 31 Acceptable 0.0 0.1 0.0 1.4 1.5
06/16/2010 <10 Acceptable 0.0 0.0 0.0 0.0 0.1
05/22/2010 20 Acceptable 0.0 0.0 0.0 0.0 0.0
10/20/2009 10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/15/2009 10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/21/2009 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/29/2009 <10 Acceptable 0.0 0.0 0.0 0.2 0.2
06/23/2009 <10 Acceptable 0.0 0.0 0.6 0.5 1.1
06/06/2009 <10 Acceptable 0.0 0.8 0.4 0.4 1.6
05/13/2009 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/21/2008 10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/20/2008 40 Acceptable 0.0 0.0 0.0 0.0 0.0
10/20/2008 10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/19/2008 10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/21/2008 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/20/2008 <10 Acceptable 0.0 0.0 0.0 0.0 0.0

Entero Count (fecal indicator) and Rainfall Correlation

98 Samples taken

All Water Quality Parameters

98 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
10/16/2023 <10 Acceptable 17.11 4.95 0.98 6.8 106.4
09/18/2023 934 Beach Advisory 22.54 8.11 1.98 n/a n/a
08/21/2023 20 Acceptable 25.86 4.45 2.44 25.5 90.4
07/17/2023 20 Acceptable 27.3 0.76 3.34 19.7 89.6
06/26/2023 <10 Acceptable 73.4 6.9 10.6 7.0 114.7
05/01/2023 336 Beach Advisory 55.1 1.6 2.7 20.5 98.0
10/10/2022 <10 Acceptable 62.8 11.4 1.7 12.2 83.8
09/10/2022 <10 Acceptable 77.8 11.6 2.1 14.2 72.1
08/12/2022 <10 Acceptable 81.3 11.5 5.1 15.3 91.3
07/15/2022 <10 Acceptable 78.8 10.6 3.9 12.4 94
06/13/2022 195 Beach Advisory 71.6 7.9 8.5 18.6 n/a
05/23/2022 20 Acceptable 63.9 6 2.4 17.9 97.6
10/25/2021 10 Acceptable 63.59 1.69 3.01 11.9 87.9
09/13/2021 41 Acceptable 74.696 1.74 3.22 29.8 91.2
08/16/2021 <10 Acceptable 79.448 5.95 4.01 8 89.9
07/19/2021 <10 Acceptable 80.06 0.4 9.68 18.2 96.9
06/07/2021 <10 Acceptable 74.678 4.99 16.98 13.9 126.7
05/17/2021 <10 Acceptable 64.814 2.37 3.51 12 108.9
10/14/2020 10 Acceptable 64.814 11.45 1.6 5.6 88.4
09/18/2020 <10 Acceptable 72.068 11.81 3.41 40.5 81.4
08/14/2020 <10 Acceptable 83.822 6.02 28.94 5.4 140.1
07/14/2020 <10 Acceptable 81.824 7.71 13.06 4.5 117.4
06/16/2020 <10 Acceptable 72.968 6.11 12.01 7.7 125.4
05/26/2020 30 Acceptable 63.662 6.36 5.4 13.6 113.5
10/08/2019 20 Acceptable 67.658 8.71 3.78 2.9 90.5
09/10/2019 <10 Acceptable 75.596 7.48 5.76 4.2 92.6
08/06/2019 20 Acceptable 81.896 8.33 14.41 8.5 94.9
07/09/2019 <10 Acceptable 79.9 5.5 7.6 6.9 96.1
06/04/2019 <10 Acceptable 67.082 4.48 2.01 11 93.1
05/07/2019 <10 Acceptable 58.766 0.96 2.11 30.9 94.5
10/10/2018 10 Acceptable 70.79 1.01 3.57 21.2 85.2
09/10/2018 41 Acceptable 75.362 11.44 1.91 13.2 64.8
08/14/2018 30 Acceptable 82.31 3.68 4.86 13.4 78.7
07/17/2018 41 Acceptable 79.61 12.32 7.25 17.5 80.8
06/13/2018 10 Acceptable 69.89 8.27 64.6 23.3 140.6
05/06/2018 10 Acceptable 55.886 0.5 2.69 27.4 102.4
10/16/2017 <10 Acceptable 68.558 9.94 3.15 12.9 90
09/11/2017 20 Acceptable 71.06 8.7 3.63 14 91.5
08/14/2017 <10 Acceptable 79.016 6.3 4.47 8.7 92.3
07/10/2017 <10 Acceptable 77.972 4.2 2.67 8.6 103.5
06/12/2017 <10 Acceptable 70.016 2 2.41 17.9 96.5
05/15/2017 10 Acceptable 57.884 0.72 4.52 26.2 98.6
04/04/2017 74 Beach Advisory n/a n/a n/a n/a n/a
10/13/2016 10 Acceptable 65.534 12.15 3.92 36.8 91.8
09/14/2016 <10 Acceptable 78.404 10.86 0.47 n/a 96.7
08/15/2016 10 Acceptable 87.044 6.95 17.09 28.8 146
07/13/2016 10 Acceptable 79.808 7.44 8.01 8.5 113.4
06/15/2016 <10 Acceptable 72.032 4.99 5.43 20.1 111.2
05/20/2016 <10 Acceptable 64.202 4.48 2.6 n/a 107.2
10/12/2015 <10 Acceptable 66.578 10.46 2.6 32.3 86.4
09/11/2015 20 Acceptable 78.008 11.07 5.06 20.6 83.5
08/12/2015 10 Acceptable 78.818 9.83 13.2 15.4 104.6
07/08/2015 <10 Acceptable 78.152 2.67 17.16 24.6 106.5
06/11/2015 <10 Acceptable 72.95 5.14 7.74 7 108.7
05/12/2015 <10 Acceptable 64.742 6.08 2.33 41.4 97.9
10/13/2014 <10 Acceptable 64.76 9.45 0.31 23.3 85.7
09/08/2014 10 Acceptable 77.324 7.08 22.01 9.9 104.1
08/12/2014 <10 Acceptable 78.206 7.44 5.65 17 83.1
07/08/2014 <10 Acceptable 77.126 3.11 9.49 13.4 98.5
06/13/2014 10 Acceptable 68.594 7.08 20.55 16.8 96.8
05/13/2014 10 Acceptable 58.55 4.39 2.46 32.7 97.4
10/17/2013 <10 Acceptable 66.236 9.47 3.75 11.2 86
09/19/2013 <10 Acceptable 70.088 6.37 3.99 15.5 88.1
08/15/2013 10 Acceptable 75.164 5.48 9.7 11.4 91.6
07/18/2013 <10 Acceptable 81.914 3.99 6.25 11.8 90.2
06/20/2013 10 Acceptable 69.008 1.21 3.89 14 93.1
05/30/2013 20 Acceptable 64.292 2.31 2.95 74.6 92.6
10/11/2012 <10 Acceptable 64.166 5.41 6.73 31.6 89.5
09/11/2012 <10 Acceptable 74.876 8.1 7.9 4.6 89.9
08/14/2012 10 Acceptable 81.248 9.09 4.64 6.2 97.3
07/17/2012 <10 Acceptable 81.374 9.4 21.89 10.3 127.6
06/12/2012 10 Acceptable 71.762 4.11 4.41 24.5 88.5
05/16/2012 <10 Acceptable 62.906 1.38 4.96 29.4 102.9
10/20/2011 52 Acceptable 63.86 1.08 0.42 83.5 93.3
09/15/2011 464 Beach Advisory 71.006 0.12 2.1 130.3 82.1
08/17/2011 <10 Acceptable 80.618 5.92 3.74 35 91.2
07/18/2011 <10 Acceptable 81.446 3.47 5.74 16 n/a
06/28/2011 <10 Acceptable 79.538 2.15 7.39 1.4 104.4
05/17/2011 120 Beach Advisory 59.54 3.88 n/a n/a 87.9
10/13/2010 <10 Acceptable 64.868 0.46 5.17 21.5 89.9
09/12/2010 <10 Acceptable 72.734 8.67 6.09 13.4 81.5
08/18/2010 10 Acceptable 79.196 10.14 10.21 17.2 87.6
07/22/2010 31 Acceptable 81.41 8.75 40.15 12.2 137.6
06/16/2010 <10 Acceptable 72.374 7.88 4.44 19.2 79.9
05/22/2010 20 Acceptable 62.96 8.22 2.67 13.6 89.8
10/20/2009 10 Acceptable 56.498 6.43 2.28 18 89.6
09/15/2009 10 Acceptable 73.382 7.46 2.78 29.4 89.5
08/21/2009 <10 Acceptable 81.212 5.61 4.24 26.3 88.6
07/29/2009 <10 Acceptable 78.278 3.64 5.1 22.8 86.2
06/23/2009 <10 Acceptable 71.438 0.47 1.12 34.4 95.2
06/06/2009 <10 Acceptable n/a n/a n/a n/a n/a
05/13/2009 <10 Acceptable 62.834 1.38 1.4 15.3 101
10/21/2008 10 Acceptable 59.396 9.45 2 8.4 89.2
10/20/2008 40 Acceptable 61.628 12.02 2.53 31.6 87.1
10/20/2008 10 Acceptable 61.124 11.86 1.93 20.5 83.5
10/19/2008 10 Acceptable 62.636 12 1.87 39.5 83.1
08/21/2008 <10 Acceptable 76.46 6.6 3.6 24.1 85.5
07/20/2008 <10 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:

Irvington, NY
This beach is located between a boat club and a village park. The site has kayaking, casual water contact, recreational boating and fishing. There’s a combined sewer outflow (CSO) approximately 100 yards to the south.

Agencies Responsible:

Westchester County Dept. of Health: 914-813-5000 and NYSDEC Region 3: 914-428-2505

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