Water Quality
Water Quality > Hudson River Estuary Data > Rockland County & Westchester County Sites > Haverstraw Bay mid-channel

Haverstraw Bay mid-channel

Haverstraw Bay midchannel
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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

109 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
10/17/2023 1 Acceptable 0.0 0.0 0.0 0.6 0.6
09/19/2023 31 Acceptable 0.0 1.0 0.2 0.1 1.3
08/22/2023 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/18/2023 41 Acceptable 0.0 0.0 1.4 0.2 1.6
06/27/2023 341 Beach Advisory 1.3 1.6 0.0 0.3 3.1
05/02/2023 74 Beach Advisory 0.0 0.2 2.2 1.6 4.0
10/11/2022 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/11/2022 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/20/2022 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/16/2022 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/14/2022 <10 Acceptable 0.1 0.0 0.0 0.0 0.1
05/24/2022 20 Acceptable 0.0 0.0 0.0 0.0 0.0
10/29/2021 457 Beach Advisory 0.0 0.0 0.0 3.4 3.4
09/14/2021 10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/17/2021 <10 Acceptable 0.0 0.0 0.0 0.1 0.1
07/20/2021 <10 Acceptable 0.0 0.1 0.3 0.9 1.3
06/08/2021 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/18/2021 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/15/2020 <10 Acceptable 0.0 0.0 0.3 0.3 0.6
09/19/2020 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/15/2020 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/15/2020 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/17/2020 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/27/2020 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/09/2019 <10 Acceptable 0.1 0.1 0.2 0.0 0.4
09/11/2019 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/07/2019 10 Acceptable 0.0 0.0 0.0 0.2 0.2
07/10/2019 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/06/2019 <10 Acceptable 0.1 0.0 0.0 0.0 0.1
05/09/2019 <10 Acceptable 0.0 0.0 0.0 0.1 0.1
10/11/2018 <10 Acceptable 0.0 0.0 0.0 0.1 0.1
09/11/2018 20 Acceptable 0.0 1.7 0.1 0.1 1.9
08/15/2018 10 Acceptable 0.0 0.0 0.8 0.2 1.0
07/18/2018 20 Acceptable 0.0 1.6 0.1 0.3 2.0
06/14/2018 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/07/2018 <10 Acceptable 0.0 0.2 0.0 0.0 0.2
10/17/2017 <10 Acceptable 0.0 0.1 0.0 0.0 0.1
09/12/2017 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/15/2017 <10 Acceptable 0.1 0.0 0.0 0.4 0.5
07/11/2017 <10 Acceptable 0.4 0.1 0.0 0.0 0.5
06/13/2017 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/16/2017 <10 Acceptable 0.0 0.0 0.1 1.7 1.8
04/06/2017 10 Acceptable 0.9 0.0 1.1 0.0 2.0
10/14/2016 <10 Acceptable 0.0 0.1 0.0 0.0 0.1
09/15/2016 <10 Acceptable 0.0 0.2 0.0 0.0 0.2
08/16/2016 <10 Acceptable 0.0 0.0 0.1 0.1 0.2
07/14/2016 <10 Acceptable 0.2 0.0 0.0 0.0 0.2
06/16/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/21/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/13/2015 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/12/2015 <10 Acceptable 0.0 0.3 1.3 0.0 1.6
08/13/2015 <10 Acceptable 0.0 0.0 1.0 0.0 1.0
07/09/2015 <10 Acceptable 0.3 0.3 0.1 0.0 0.7
06/11/2015 10 Acceptable 0.0 0.0 0.2 0.2 0.4
05/12/2015 10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/14/2014 <10 Acceptable 0.0 0.0 0.0 0.4 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 0.4
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 <10 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 0.5 0.0 0.0 0.0 0.5
05/16/2012 <10 Acceptable 0.1 0.4 0.1 0.0 0.6
10/20/2011 <10 Acceptable 0.0 0.1 0.0 0.0 0.1
09/15/2011 72 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 31 Acceptable 1.2 0.0 0.8 0.0 2.0
10/13/2010 <10 Acceptable 0.0 0.1 0.3 0.0 0.4
09/12/2010 20 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 <10 Acceptable 0.0 0.1 0.0 1.4 1.5
06/16/2010 20 Acceptable 0.0 0.0 0.0 0.0 0.0
05/22/2010 <10 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 0.6 0.0 0.0 0.2 0.8
06/23/2009 10 Acceptable 0.0 0.0 0.6 0.5 1.1
06/08/2009 <10 Acceptable 0.0 0.0 0.0 0.8 0.8
05/13/2009 6 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
09/23/2008 <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
07/15/2008 <10 Acceptable 0.0 1.1 0.0 0.0 1.1
06/25/2008 86 Beach Advisory 0.0 0.0 0.0 0.1 0.1
06/16/2008 5 Acceptable 0.0 0.0 1.7 0.0 1.7
05/20/2008 6 Acceptable 0.0 0.0 0.2 0.1 0.3
09/09/2007 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/23/2007 <10 Acceptable 0.0 0.0 1.3 0.1 1.4
07/16/2007 66 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/28/2007 9 Acceptable 0.0 0.7 0.0 0.0 0.7
06/20/2007 5 Acceptable 0.1 0.3 0.0 0.0 0.4
05/21/2007 <10 Acceptable 0.0 0.0 0.2 0.0 0.2
04/25/2007 164 Beach Advisory 0.0 0.0 0.0 0.0 0.0
12/06/2006 58 Acceptable 0.0 0.0 0.0 0.0 0.0
10/20/2006 16 Acceptable 0.4 0.1 0.0 1.1 1.6
09/19/2006 4 Acceptable 0.0 0.0 0.0 0.0 0.0

Entero Count (fecal indicator) and Rainfall Correlation

109 Samples taken

All Water Quality Parameters

109 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
10/17/2023 1 Acceptable 17.06 1.26 1.17 9.3 101.8
09/19/2023 31 Acceptable 23.14 3.49 2.03 n/a n/a
08/22/2023 <10 Acceptable 24.85 1.31 2.3 6.3 80.7
07/18/2023 41 Acceptable 26.52 0.14 3.9 40.3 84.9
06/27/2023 341 Beach Advisory 71.2 5.7 5.2 8.2 89.2
05/02/2023 74 Beach Advisory 55.1 1.9 2.1 12.9 92.3
10/11/2022 <10 Acceptable 63.9 6.7 2.3 5.3 84.5
09/11/2022 <10 Acceptable 77.1 6.7 9.3 6.6 79.1
08/20/2022 <10 Acceptable 80.2 6.4 5.5 5.4 106.7
07/16/2022 <10 Acceptable 77.8 5.6 3.4 12 86.9
06/14/2022 <10 Acceptable 70.5 3.4 3.6 21.4 n/a
05/24/2022 20 Acceptable 62.5 3.4 3.7 14.9 n/a
10/29/2021 457 Beach Advisory 60.3 0.8 2.6 8 88
09/14/2021 10 Acceptable 74.6 0.3 5.1 16 85
08/17/2021 <10 Acceptable 78.2 3.2 5.5 13 82
07/20/2021 <10 Acceptable 79.2 0.2 5.7 13 87
06/08/2021 <10 Acceptable 67.9 3.1 8.7 13 92
05/18/2021 <10 Acceptable 60.7 0.7 3.4 12 95
10/15/2020 <10 Acceptable 65.7 9.1 3.5 7 89
09/19/2020 <10 Acceptable 72.3 8.9 3.8 8 87
08/15/2020 <10 Acceptable 83.2 5.1 6.7 9 84
07/15/2020 <10 Acceptable 80.7 5.1 7.1 6 92
06/17/2020 <10 Acceptable 72.2 5.2 3.9 6 96
05/27/2020 <10 Acceptable 63.1 2.5 1.9 16 99
10/09/2019 <10 Acceptable 68.8 5.7 3.4 4 88
09/11/2019 <10 Acceptable 78.4 5.3 3.5 6 92
08/07/2019 10 Acceptable 84.8 5.2 8.1 10 86
07/10/2019 <10 Acceptable 80.9 2.7 14.7 9 112
06/06/2019 <10 Acceptable 68.5 1.0 2.0 20 92
05/09/2019 <10 Acceptable 56.8 0.1 2.2 23 98
10/11/2018 <10 Acceptable 71.5 0.1 3.3 18 88
09/11/2018 20 Acceptable 78.3 3.0 3.6 7 76
08/15/2018 10 Acceptable 83.4 0.2 3.0 22 81
07/18/2018 20 Acceptable 83.0 5.8 10.8 18 98
06/14/2018 <10 Acceptable 71.8 4.6 8.7 17 99
05/07/2018 <10 Acceptable 54.9 0.1 2.0 31 104
10/17/2017 <10 Acceptable 68.9 8.1 2.1 11 90
09/12/2017 <10 Acceptable 75.7 5.1 3.0 10 88
08/15/2017 <10 Acceptable 81.7 3.5 6.7 14 89
07/11/2017 <10 Acceptable 78.9 1.6 2.5 12 88
06/13/2017 <10 Acceptable 70.6 0.1 4.0 14 118
05/16/2017 <10 Acceptable 59.4 0.1 2.4 29 95
04/06/2017 10 Acceptable 42.3 0.1 2.0 23 97
10/14/2016 <10 Acceptable 65.9 9.5 2.6 36 91
09/15/2016 <10 Acceptable 77.9 8.4 5.4 n/a 96
08/16/2016 <10 Acceptable 84.7 4.4 5.9 33 89
07/14/2016 <10 Acceptable 80.0 4.9 9.5 9 94
06/16/2016 <10 Acceptable 71.0 3.8 5.8 20 97
05/21/2016 <10 Acceptable 59.6 1.7 3.6 46 95
10/13/2015 <10 Acceptable 68.8 5.9 4.5 11 90
09/12/2015 <10 Acceptable 81.3 6.3 4.1 13 84
08/13/2015 <10 Acceptable 81.3 4.9 5.5 10 88
07/09/2015 <10 Acceptable 77.5 0.3 3.7 30 86
06/11/2015 10 Acceptable 73.0 1.3 4.6 4 98
05/12/2015 10 Acceptable 63.6 2.1 2.2 36 100
10/14/2014 <10 Acceptable 69.6 5.5 2.9 17 91
09/08/2014 <10 Acceptable 79.8 4.4 14.1 15 110
08/12/2014 <10 Acceptable 79.5 4.9 5.5 22 87
07/08/2014 <10 Acceptable 80.0 1.5 3.9 15 94
06/13/2014 <10 Acceptable n/a n/a n/a n/a n/a
05/13/2014 <10 Acceptable 59.6 2.5 1.6 20 100
10/17/2013 <10 Acceptable 68.4 7.3 3.9 7 93
09/19/2013 10 Acceptable 73.2 4.5 3.8 12 97
08/15/2013 10 Acceptable 81.2 1.6 3.9 37 88
07/18/2013 <10 Acceptable 84.3 2.6 2.9 35 77
06/20/2013 10 Acceptable 71.4 0.1 3.3 18 101
05/30/2013 <10 Acceptable 67.9 0.1 2.3 26 93
10/11/2012 <10 Acceptable 67.7 4.7 3.5 24 86
09/11/2012 <10 Acceptable 79.1 5.1 4.9 113 91
08/14/2012 <10 Acceptable 82.9 7.0 4.3 5 88
07/17/2012 10 Acceptable 84.5 7.3 11.4 11 123
06/12/2012 10 Acceptable 73.4 0.3 2.5 27 89
05/16/2012 <10 Acceptable 63.9 0.1 3.9 31 100
10/20/2011 <10 Acceptable 64.5 0.1 1.2 64 89
09/15/2011 72 Beach Advisory 69.1 0.1 1.6 145 87
08/17/2011 <10 Acceptable 82.3 3.2 2.9 21 83
07/18/2011 <10 Acceptable 82.8 1.1 2.5 16 n/a
06/28/2011 <10 Acceptable 77.5 1.2 3.6 n/a 84
05/17/2011 31 Acceptable 59.8 0.3 2.4 166 92
10/13/2010 <10 Acceptable 66.2 0.1 4.0 28 86
09/12/2010 20 Acceptable 72.8 6.1 6.5 24 87
08/18/2010 <10 Acceptable 83.8 4.7 5.5 52 87
07/22/2010 <10 Acceptable 83.6 5.8 9.4 10 105
06/16/2010 20 Acceptable 73.3 4.4 3.5 17 82
05/22/2010 <10 Acceptable 65.7 2.5 2.8 23 93
10/20/2009 10 Acceptable 61.2 3.9 2.8 13 93
09/15/2009 <10 Acceptable 76.7 4.6 2.1 28 83
08/21/2009 10 Acceptable 82.1 3.7 10.3 21 97
07/29/2009 <10 Acceptable 79.3 0.5 2.8 31 84
06/23/2009 10 Acceptable 72.5 0.1 1.2 21 97
06/08/2009 <10 Acceptable n/a n/a n/a n/a n/a
05/13/2009 6 Acceptable 60.7 0.2 3.9 31 102
10/21/2008 <10 Acceptable 65.2 5.5 1.8 8 88
09/23/2008 <10 Acceptable 76.0 3.2 1.7 9 87
08/21/2008 <10 Acceptable 80.0 2.8 2.4 10 82
07/15/2008 <10 Acceptable 82.3 4.0 3.3 16 96
06/25/2008 86 Beach Advisory 76.6 4.6 1.7 16 88
06/16/2008 5 Acceptable n/a n/a n/a n/a n/a
05/20/2008 6 Acceptable 59.9 1.4 1.4 27 94
09/09/2007 <10 Acceptable 79.7 8.4 5.9 14 107
08/23/2007 <10 Acceptable 78.0 6.0 2.4 4 82
07/16/2007 66 Beach Advisory 83.2 5.0 2.0 12 100
06/28/2007 9 Acceptable n/a n/a n/a n/a n/a
06/20/2007 5 Acceptable n/a n/a n/a n/a n/a
05/21/2007 <10 Acceptable 64.9 0.1 2.0 52 98
04/25/2007 164 Beach Advisory 48.7 0.1 0.6 643 109
12/06/2006 58 Acceptable 45.4 0.5 1.4 16 96
10/20/2006 16 Acceptable n/a n/a n/a n/a n/a
09/19/2006 4 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:

Haverstraw, NY
Near the ship channel in Haverstraw Bay, this deep water sampling site has recreational boating and fishing.

Agencies Responsible:

Rockland County Dept. of Health: 845-364-2900, Westchester County Dept. of Health: 914-813-5000 and NYSDEC Region 3: 914-428-2505

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