Water Quality
Water Quality > Water Quality Testing Locations > New York City, Hudson County & Bergen County > George Washington Bridge midchannel

George Washington Bridge midchannel

About this location:

Manhattan, NY
This deep water sample site at the George Washington Bridge has recreational boating, jet-skiing, kayaking and occasional swim events.

The data displayed on these pages relates to the levels of sewage indicating microbes. Even though the levels on a single days can fall within acceptable levels for Enterococcus, these locations are not necessarily acceptable for swimming. Other water quality parameters not reported on this web site such as chemical contamination and floatables should cause users to exercise caution at this site.

Agencies Responsible:

NYCDEP: 212-639-9675 and NYSDEC Region 2: 718-482-4933

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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

36 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
10/21/2011 52 Possible Risk 0 0 1.1 1.1 1.1
09/14/2011 30 Acceptable 0 0 0 0 0
08/16/2011 20 Acceptable 0 0.6 6.4 6.4 6.4
07/19/2011 <10 Acceptable 0 0.1 0.1 0.1 0.1
06/27/2011 <10 Acceptable 0 0 0 0 0.6
05/16/2011 41 Possible Risk 0.2 1.1 1.1 1.1 1.1
10/12/2010 110 Unacceptable 0.1 1.2 1.2 1.2 1.2
09/11/2010 <10 Acceptable 0 0 0 0 0
08/17/2010 <10 Acceptable 0 0.1 0.3 0.3 0.3
07/21/2010 <10 Acceptable 0 0 0.1 0.1 0.1
06/15/2010 10 Acceptable 0 0 0.3 0.3 0.6
05/21/2010 <10 Acceptable 0 0 0 1.1 1.1
10/19/2009 10 Acceptable 0 0.3 0.3 0.4 1
09/14/2009 <10 Acceptable 0 0 0 0.9 0.9
08/20/2009 <10 Acceptable 0 0 0.6 0.6 0.6
07/28/2009 <10 Acceptable 0 0.6 2 2 2.4
06/22/2009 <10 Acceptable 0 0.5 0.7 0.7 3
06/06/2009 <10 Acceptable 0 0.9 1.5 2 2
05/12/2009 10 Acceptable 0 0 0 0.6 1.7
10/20/2008 <10 Acceptable 0 0 0 0 0
09/24/2008 <10 Acceptable 0 0 0 0 0
08/19/2008 <10 Acceptable 0 0 0 0 1.1
07/14/2008 31 Acceptable 0.5 0.5 0.5 0.5 0.5
07/02/2008 16 Acceptable 0 0 0 0.6 1.1
06/24/2008 134 Unacceptable 0 0.1 0.1 0.1 0.3
05/19/2008 <10 Acceptable 0 0.1 0.2 1.1 1.1
09/06/2007 1 Acceptable 0 0 0 0 0
08/16/2007 6 Acceptable 0 0 0 0.1 0.1
07/11/2007 1500 Unacceptable 1 1 1 1 1
06/18/2007 11 Acceptable 0 0 0 0 0
05/23/2007 5 Acceptable 0 0 0 0 0.2
04/18/2007 246 Unacceptable 0 0 0.9 8.5 8.5
12/13/2006 46 Possible Risk 0.2 0.2 0.2 0.2 0.2
11/10/2006 72 Possible Risk 0 0 3.6 3.6 3.6
10/18/2006 29 Acceptable 0 1.1 1.1 1.1 1.1
09/26/2006 2 Acceptable 0 0 0 0.1 0.1

Basic Sampling Data

36 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
10/21/2011 52 Possible Risk 61.8 3.4 1.7 30 92
09/14/2011 30 Acceptable 71.9 1.3 1.8 118.8 81.4
08/16/2011 20 Acceptable 78.4 12.2 2.3 29 78
07/19/2011 <10 Acceptable 80.9 10.9 2.7 11 86
06/27/2011 <10 Acceptable 73.6 7.6 4 20 74
05/16/2011 41 Possible Risk 58.6 6.4 2.8 242 88
10/12/2010 110 Unacceptable 65.9 9.9 3.6 16 82
09/11/2010 <10 Acceptable 73.8 16.6 1.9 20 68
08/17/2010 <10 Acceptable 80 14.9 7.1 6 85
07/21/2010 <10 Acceptable 83.1 12 77.7 11 190
06/15/2010 10 Acceptable 71.6 16 4 18 75
05/21/2010 <10 Acceptable 62.5 11.3 3.3 17 89
10/19/2009 10 Acceptable 56.5 12.9 n/a n/a 88
09/14/2009 <10 Acceptable 74.3 9.5 3.8 27 92
08/20/2009 <10 Acceptable 80.5 10.2 2.3 20 79
07/28/2009 <10 Acceptable 77.5 10.8 3.2 16 79
06/22/2009 <10 Acceptable 70.3 2.3 0.9 62 84
06/06/2009 <10 Acceptable n/a n/a n/a n/a n/a
05/12/2009 10 Acceptable 60.4 5.1 1.3 20 93
10/20/2008 <10 Acceptable 61.9 21.8 1.5 7 82
09/24/2008 <10 Acceptable 70.9 11.7 2.3 8 85
08/19/2008 <10 Acceptable 76.7 13.4 1.2 14 78
07/14/2008 31 Acceptable 78.6 10.1 6.3 10 101
07/02/2008 16 Acceptable 77.5 11.7 7.6 14 101
06/24/2008 134 Unacceptable 73.9 13.2 4.1 9 91
05/19/2008 <10 Acceptable 59.2 7.4 1.1 29 93
09/06/2007 1 Acceptable 75.1 17.2 5.7 11 90
08/16/2007 6 Acceptable 78.3 15.8 2.4 17 75
07/11/2007 1500 Unacceptable 73 19.2 4.8 84 89
06/18/2007 11 Acceptable n/a n/a n/a n/a n/a
05/23/2007 5 Acceptable 63.4 7.7 1.1 46 n/a
04/18/2007 246 Unacceptable * * * * *
12/13/2006 46 Possible Risk * * * * *
11/10/2006 72 Possible Risk * * * * *
10/18/2006 29 Acceptable * * * * *
09/26/2006 2 Acceptable * * * * *

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