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Water Quality > Water Quality Testing Locations > Rockland County & Westchester County > Ossining Beach

Ossining Beach

Ossining Beach

About this location:

Ossining, NY
Swimming at Ossining beach is prohibited, yet casual contact with the water has been observed. The beach is immediately north of a sewage treatment plant outfall. There is fishing, boating and kayaking at this site.

Agencies Responsible:

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

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Basic Sampling Data

Physical, chemical and biological properties of the surface water that are measured continuously while the patrol boat is underway.

Water Quality, Enterococcus Count and Precipitation

41 Samples taken

Sample Date [i] Enterococcus
Count
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Enterococcus Count

Enterococcus is a commonly used indicator of water quality and sewage contamination.

Quality Rain, day
of (in)		 Prior Day 2 Days
Prior		 3 Days
Prior		 5 Days
Prior
10/11/2012 20 Acceptable 0.0 0.1 0.1 0.1 0.2
09/11/2012 10 Acceptable 0.0 0.0 0.0 1.4 2.1
08/14/2012 <10 Acceptable 0.0 0.0 0.0 0.0 0.2
07/17/2012 <10 Acceptable 0.0 0.0 0.2 0.2 0.2
06/12/2012 20 Acceptable 0.5 0.5 0.6 0.6 0.6
05/16/2012 <10 Acceptable 0.1 0.4 0.5 0.5 0.5
10/20/2011 63 Possible Risk 0.0 0.1 0.1 0.1 0.1
09/15/2011 31 Acceptable 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 63 Possible Risk 0.0 0.0 0.0 0.0 1.1
05/17/2011 4611 Unacceptable 1.2 1.2 2.0 2.0 2.0
10/13/2010 <10 Acceptable 0.0 0.1 0.3 0.3 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 0.5 0.5
07/22/2010 441 Unacceptable 0.0 0.1 0.1 1.5 1.5
06/16/2010 10 Acceptable 0.0 0.0 0.0 0.1 0.1
05/22/2010 10 Acceptable 0.0 0.0 0.0 0.0 1.6
10/20/2009 <10 Acceptable 0.0 0.0 0.0 0.0 0.3
09/15/2009 <10 Acceptable 0.0 0.0 0.0 0.0 0.3
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 0.5
06/23/2009 20 Acceptable 0.0 0.0 0.6 1.1 3.9
06/08/2009 <10 Acceptable 0.0 0.0 0.0 0.8 1.7
05/13/2009 10 Acceptable 0.0 0.0 0.0 0.0 0.3
10/21/2008 41 Possible Risk 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 1.1 1.1 1.1
06/25/2008 1483 Unacceptable 0.0 0.0 0.0 0.1 0.3
06/16/2008 6 Acceptable 0.0 0.0 1.7 1.7 1.7
05/20/2008 2420 Unacceptable 0.0 0.0 0.2 0.3 1.2
09/09/2007 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/23/2007 48 Possible Risk 0.0 0.0 1.3 1.4 1.5
07/16/2007 6 Acceptable 0.0 0.0 0.0 0.0 1.0
06/20/2007 11 Acceptable 0.1 0.5 0.5 0.5 0.5
05/21/2007 13 Acceptable 0.0 0.0 0.2 0.2 1.1
04/25/2007 43 Possible Risk 0.0 0.0 0.0 0.0 0.0
12/06/2006 69 Possible Risk 0.0 0.0 0.0 0.0 0.2
10/20/2006 15 Acceptable 0.4 0.5 0.5 1.6 1.6
09/19/2006 2 Acceptable 0.0 0.0 0.0 0.0 1.7

Basic Sampling Data

41 Samples taken

Sample Date [i] Enterococcus
Count
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Enterococcus Count

Enterococcus is a commonly used indicator of water quality and sewage contamination.

Quality Temperature
(f)		 Salinity Chlorophyll Turbidity Oxygen
10/11/2012 20 Acceptable 62.9 4.1 6.9 44.4 94.5
09/11/2012 10 Acceptable 76.0 6.5 6.4 18 93
08/14/2012 <10 Acceptable 82.1 7.4 4.4 12 96
07/17/2012 <10 Acceptable 83.1 8.3 23.4 8 133
06/12/2012 20 Acceptable 72.7 1.7 6.1 27 92
05/16/2012 <10 Acceptable 66.9 0.4 5.9 16 118
10/20/2011 63 Possible Risk 63.4 0.3 0.7 118 92
09/15/2011 31 Acceptable 71.6 0.1 2.3 90 86
08/17/2011 <10 Acceptable 82.2 4.7 6.7 17 106
07/18/2011 <10 Acceptable 83.0 2.0 8.6 16 n/a
06/28/2011 63 Possible Risk 80.5 1.5 12.5 15 115
05/17/2011 4611 Unacceptable 61.0 1.7 n/a n/a 93
10/13/2010 <10 Acceptable 65.0 0.2 7.2 21 91
09/12/2010 10 Acceptable 71.3 6.3 19.6 20 91
08/18/2010 <10 Acceptable 80.8 7.1 9.2 159 100
07/22/2010 441 Unacceptable 82.0 7.1 41.4 32 147
06/16/2010 10 Acceptable 73.3 6.2 12.2 16 91
05/22/2010 10 Acceptable 64.6 5.0 7.1 9 92
10/20/2009 <10 Acceptable 59.1 4.7 2.0 12 91
09/15/2009 <10 Acceptable 75.7 5.2 3.0 34 94
08/21/2009 10 Acceptable 83.3 3.6 20.6 15 124
07/29/2009 <10 Acceptable 79.6 2.0 5.7 23 96
06/23/2009 20 Acceptable 72.1 0.4 1.6 15 102
06/08/2009 <10 Acceptable n/a n/a n/a n/a n/a
05/13/2009 10 Acceptable 63.9 0.9 5.1 15 111
10/21/2008 41 Possible Risk 60.9 7.7 3.7 6 93
09/23/2008 <10 Acceptable 72.4 5.4 2.4 6 94
08/21/2008 <10 Acceptable 77.5 4.8 12.9 15 113
07/15/2008 10 Acceptable 80.9 4.7 5.8 21 109
06/25/2008 1483 Unacceptable 77.3 5.7 5.4 12 105
06/16/2008 6 Acceptable n/a n/a n/a n/a n/a
05/20/2008 2420 Unacceptable 58.2 2.6 2.4 35 96
09/09/2007 <10 Acceptable 79.3 8.3 13.2 12 116
08/23/2007 48 Possible Risk 75.0 6.6 3.4 6 82
07/16/2007 6 Acceptable 79.3 7.2 4.0 27 90
06/20/2007 11 Acceptable n/a n/a n/a n/a n/a
05/21/2007 13 Acceptable 62.6 0.7 2.7 55 97
04/25/2007 43 Possible Risk 53.6 0.1 1.7 365 106
12/06/2006 69 Possible Risk 44.5 0.2 1.4 9 96
10/20/2006 15 Acceptable n/a n/a n/a n/a n/a
09/19/2006 2 Acceptable n/a n/a n/a n/a n/a

Rainfall data comes from wunderground.com. It is added daily to show cumulative amounts.

Acceptable Color
Enterococcus count (under 35/100ml) is acceptable by EPA standards*
Possible Risk Color
Enterococcus count (between 35 and 104/100ml), if sustained over time, would be unacceptable by EPA standards*
Unacceptable Color
Enterococcus count (over 104/100ml) is unacceptable by EPA standards*

What do the Numbers Mean?

We have based our assessment of acceptable water quality on the federal guidelines outlined in the 2000 Beaches Environmental Assessment and Coastal Health (BEACH) Act. Learn More