Tarrytown Marina

Tarrytown Marina copy

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

51 Samples taken

Sample Date [i] Enterococcus Count

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.

QualityRain, day of (in)Prior Day2 Days Prior3 Days Prior Rain4 Days Total Rain
SortSortSortSortSortSortSortSort
09/11/201720Acceptable0.00.00.00.00.0
08/14/201710Acceptable0.00.00.40.30.8
07/10/201786Beach Advisory0.00.00.02.22.2
06/12/2017<10Acceptable0.00.00.00.00.0
05/15/201710Acceptable0.00.11.70.01.8
10/13/2016556Beach Advisory0.10.00.00.00.1
09/14/2016<10Acceptable0.00.00.00.00.0
08/15/201631Acceptable0.00.10.10.20.4
07/13/201610Acceptable0.00.00.00.00.0
06/15/2016<10Acceptable0.00.00.00.00.0
05/20/201610Acceptable0.00.00.00.00.0
10/12/20154884Beach Advisory0.00.00.00.10.1
09/11/201510Acceptable0.31.30.00.01.6
08/12/2015110Beach Advisory0.01.00.00.01.0
07/08/2015<10Acceptable0.00.10.00.00.1
06/11/2015<10Acceptable0.00.00.20.20.4
05/12/201510Acceptable0.00.00.00.00.0
10/13/201420Acceptable0.00.00.40.00.4
09/08/2014<10Acceptable0.00.00.00.00.0
08/12/201431Acceptable0.00.00.00.00.0
07/08/201475Beach Advisory0.20.00.00.00.2
06/13/2014110Beach Advisory1.40.00.10.01.5
05/13/201420Acceptable0.00.00.10.30.4
10/17/201320Acceptable0.00.00.00.00.0
09/19/2013<10Acceptable0.00.00.00.00.0
08/15/201373Beach Advisory0.00.00.70.41.1
07/18/201385Beach Advisory0.00.00.00.00.0
06/20/201341Acceptable0.00.00.30.20.5
05/30/201320Acceptable0.00.00.40.00.4
10/11/2012389Beach Advisory0.00.10.00.00.1
09/11/201210Acceptable0.00.00.01.41.4
08/14/201210Acceptable0.00.00.00.00.0
07/17/201210Acceptable0.00.00.20.00.2
06/12/201275Beach Advisory0.00.00.00.00.0
05/16/201231Acceptable0.10.40.10.00.6
10/20/201186Beach Advisory0.00.10.00.00.1
09/15/201186Beach Advisory0.00.00.00.00.0
08/17/2011<10Acceptable0.00.00.03.43.4
08/15/2011158Beach Advisory0.03.40.00.03.4
07/18/2011<10Acceptable0.00.00.00.00.0
06/28/201141Acceptable0.00.00.00.00.0
05/17/2011>24196Beach Advisory1.20.00.80.02.0
10/13/2010>24196Beach Advisory0.00.10.30.00.4
09/12/2010<10Acceptable0.00.00.00.00.0
08/18/201010Acceptable0.00.00.20.30.5
07/22/20103654Beach Advisory0.00.10.01.41.5
08/22/20092310Beach Advisory0.60.60.00.01.2
09/27/200874Beach Advisory0.01.60.10.01.7
09/09/2008213Beach Advisory0.60.00.04.85.4
08/21/200810Acceptable0.00.00.00.00.0
08/06/20083873Beach Advisory1.60.00.00.01.6

Entero Count (fecal indicator) and Rainfall Correlation

51 Samples taken

All Water Quality Parameters

51 Samples taken

Sample Date [i] Entero Count

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)

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

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

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

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

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%).

SortSortSortSortSortSortSortSort
09/11/201720Acceptable71.18.53.918.592.8
08/14/201710Acceptable79.374.812.385.9
07/10/201786Beach Advisory79.53.95.79.0114.7
06/12/2017<10Acceptable74.51.54.218.9106.4
05/15/201710Acceptable58.80.27.962.9102.8
10/13/2016556Beach Advisory65.911.53.43891
09/14/2016<10Acceptable78.6100.8n/a118
08/15/201631Acceptable87.86.51831162
07/13/201610Acceptable82.27.211.310117
06/15/2016<10Acceptable73.34.85.220111
05/20/201610Acceptable64.34.36n/a112
10/12/20154884Beach Advisory67.28.44.42797
09/11/201510Acceptable78.310.25.61985
08/12/2015110Beach Advisory79.38.917.646113
07/08/2015<10Acceptable79.82.415.934118
06/11/2015<10Acceptable73.64.710.34111
05/12/201510Acceptable68.15.822498
10/13/201420Acceptable64.69.20.22088
09/08/2014<10Acceptable76.87.526.49105
08/12/201431Acceptable77.68.45.92976
07/08/201475Beach Advisory77.62.712.21899
06/13/2014110Beach Advisory688.728.22695
05/13/201420Acceptable59.34.52.19496
10/17/201320Acceptable66.49.13787
09/19/2013<10Acceptable69.57.33.91785
08/15/201373Beach Advisory74.756.41492
07/18/201385Beach Advisory75.33.54.91785
06/20/201341Acceptable69.41.43.81892
05/30/201320Acceptable66.82.10.86292
10/11/2012389Beach Advisory62.75.36.22788
09/11/201210Acceptable75.18.373089
08/14/201210Acceptable80.99.44.4996
07/17/201210Acceptable81.310.822.210112
06/12/201275Beach Advisory71.844.32583
05/16/201231Acceptable64.61.34.551104
10/20/201186Beach Advisory64.21.10.513793
09/15/201186Beach Advisory71.20.1210781
08/17/2011<10Acceptable806.63.92889
08/15/2011158Beach Advisoryn/an/an/an/an/a
07/18/2011<10Acceptable81.94.216.719n/a
06/28/201141Acceptable78.82.172102
05/17/2011>24196Beach Advisory59.62.838090
10/13/2010>24196Beach Advisory63.60.36.92687
09/12/2010<10Acceptable72.59.37.41976
08/18/201010Acceptable78.99.39.73385
07/22/20103654Beach Advisory82.29.137.812175
08/22/20092310Beach Advisory80.34.9352090
09/27/200874Beach Advisoryn/an/an/an/an/a
09/09/2008213Beach Advisoryn/an/an/an/an/a
08/21/200810Acceptable76.16.43.93285
08/06/20083873Beach Advisoryn/an/an/an/an/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:

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

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