Water Quality
Water Quality > Water Quality Testing Locations > Rockland County & Westchester County Sites > Tarrytown Marina

Tarrytown Marina

Tarrytown Marina copy
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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

22 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 3 Days Total Rain
Sort Sort Sort Sort Sort Sort Sort Sort
05/30/2013 20 Acceptable 0.0 0.0 0.4 0.0 0.4
10/11/2012 389 Unacceptable 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
07/17/2012 10 Acceptable 0.0 0.0 0.2 0.0 0.2
06/12/2012 75 Possible Risk 0.0 0.0 0.0 0.0 0
05/16/2012 31 Possible Risk 0.1 0.3 0.1 0.0 0.5
10/20/2011 86 Possible Risk 0.0 0.1 0.0 0.0 0.1
09/15/2011 86 Possible Risk 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
06/28/2011 41 Possible Risk 0.0 0.0 0.0 0.0 0
05/17/2011 >24196 Unacceptable 1.2 0.0 0.8 0.0 2
10/13/2010 >24196 Unacceptable 0.0 0.1 0.2 0.0 0.3
09/12/2010 <10 Acceptable 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 3654 Unacceptable 0.0 0.1 0.0 1.4 1.5
08/22/2009 2310 Unacceptable 0.6 0.6 0.0 0.0 1.2
09/27/2008 74 Possible Risk 0.0 1.7 0.0 0.0 1.7
09/09/2008 213 Unacceptable 0.6 0.0 0.0 4.8 5.4
08/21/2008 10 Acceptable 0.0 0.0 0.0 0.0 0
08/06/2008 3873 Unacceptable 1.6 0.0 0.0 0.1 1.7

Entero Count (fecal indicator) and Rainfall Correlation

22 Samples taken

All Water Quality Parameters

22 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
05/30/2013 20 Acceptable 66.8 2.1 0.8 62.4 91.5
10/11/2012 389 Unacceptable 62.7 5.3 6.2 27.4 88.1
09/11/2012 10 Acceptable 75.1 8.3 7.0 30 89
08/14/2012 10 Acceptable 80.9 9.4 4.4 9 96
07/17/2012 10 Acceptable 81.3 10.8 22.2 10 112
06/12/2012 75 Possible Risk 71.8 4.0 4.3 25 83
05/16/2012 31 Possible Risk 64.6 1.3 4.5 51 104
10/20/2011 86 Possible Risk 64.2 1.1 0.5 137 93
09/15/2011 86 Possible Risk 71.2 0.1 2.0 107 81
08/17/2011 <10 Acceptable 80.0 6.6 3.9 28 89
07/18/2011 <10 Acceptable 81.9 4.2 16.7 19 n/a
06/28/2011 41 Possible Risk 78.8 2.1 7.0 2 102
05/17/2011 >24196 Unacceptable 59.6 2.8 3.0 80 90
10/13/2010 >24196 Unacceptable 63.6 0.3 6.9 26 87
09/12/2010 <10 Acceptable 72.5 9.3 7.4 19 76
08/18/2010 10 Acceptable 78.9 9.3 9.7 33 85
07/22/2010 3654 Unacceptable 82.2 9.1 37.8 12 175
08/22/2009 2310 Unacceptable 80.3 4.9 35.0 20 90
09/27/2008 74 Possible Risk n/a n/a n/a n/a n/a
09/09/2008 213 Unacceptable n/a n/a n/a n/a n/a
08/21/2008 10 Acceptable 76.1 6.4 3.9 32 85
08/06/2008 3873 Unacceptable n/a n/a n/a n/a n/a

Water Quality

Acceptable (0–29)
Possible Risk (30–110)
Unacceptable (111+)
(Enterococcus count per 100mL)

Prior Three Day Rainfall
(in inches)

Dry Weather (0–0.25)
Wet Weather (0.25+)

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:

Tarrytown, NY
This large marina has boating and fishing.

Agencies Responsible:

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