Harlem River – Willis Ave. Bridge

About this location:

Bronx, NY
The Harlem River at the Willis Avenue Bridge is an industrial waterway, connecting the Hudson with the East River. Contact includes recreational boating and jet-skiing, kayaking, as well as recreational and subsistence fishing from the shore.

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

Water Quality Enterococcus Count
Basic Sampling Data [i]

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

35 Samples taken

Sample Date	[i] Enterococcus Count close 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	41	Possible Risk	0	0	0	0	0
08/16/2011	565	Unacceptable	0	0.6	6.4	6.4	6.4
07/19/2011	30	Acceptable	0	0.1	0.1	0.1	0.1
06/27/2011	<10	Acceptable	0	0	0	0	0.6
05/16/2011	448	Unacceptable	0.2	1.1	1.1	1.1	1.1
10/12/2010	487	Unacceptable	0.1	1.2	1.2	1.2	1.2
09/11/2010	10	Acceptable	0	0	0	0	0
08/17/2010	63	Possible Risk	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	20	Acceptable	0	0	0.6	0.6	0.6
07/28/2009	399	Unacceptable	0	0.6	2	2	2.4
06/22/2009	85	Possible Risk	0	0.5	0.7	0.7	3
06/05/2009	512	Unacceptable	0.9	1.5	2	2	2
05/12/2009	20	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	5635	Unacceptable	0.5	0.5	0.5	0.5	0.5
07/02/2008	10	Acceptable	0	0	0	0.6	1.1
06/24/2008	160	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	4	Acceptable	0	0	0	0	0
08/16/2007	19	Acceptable	0	0	0	0	0
07/11/2007	11	Acceptable	0	0	0	0	0
06/18/2007	16	Acceptable	0	0	0	0	0
05/23/2007	3	Acceptable	0	0	0	0	0.2
04/18/2007	356	Unacceptable	0	0	0.9	8.5	8.5
11/10/2006	310	Unacceptable	0	0	3.6	3.6	3.6
10/18/2006	263	Unacceptable	0	1.1	1.1	1.1	1.1
09/26/2006	25	Acceptable	0	0	0	0.1	0.1

Basic Sampling Data

35 Samples taken

Sample Date	[i] Enterococcus Count close 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	63.3	16.8	0.6	25	76
09/14/2011	41	Possible Risk	71.2	1.9	2	197.8	76.7
08/16/2011	565	Unacceptable	75	19.7	1	25	42
07/19/2011	30	Acceptable	74.5	20.7	1.6	17	66
06/27/2011	<10	Acceptable	71	19.3	1.6	8	59
05/16/2011	448	Unacceptable	57.2	11.3	2.3	66	81
10/12/2010	487	Unacceptable	65.9	19.7	1.6	14	70
09/11/2010	10	Acceptable	72.2	22.2	1.5	19	63
08/17/2010	63	Possible Risk	75.8	26	2	6	46
07/21/2010	<10	Acceptable	77.9	25	1.7	5	47
06/15/2010	<10	Acceptable	67	21.1	0.4	24	62
05/21/2010	10	Acceptable	56.8	23.2	2.1	13	75
10/19/2009	10	Acceptable	56.4	14.7	1.1	18	84
09/14/2009	<10	Acceptable	71.3	23.9	0.6	36	64
08/20/2009	20	Acceptable	78.2	15.9	2	20	63
07/28/2009	399	Unacceptable	73.9	21.5	1.1	8	51
06/22/2009	85	Possible Risk	69.5	5.9	1	69	75
06/05/2009	512	Unacceptable	n/a	n/a	n/a	n/a	n/a
05/12/2009	20	Acceptable	58.7	12.9	0.7	23	78
10/20/2008	10	Acceptable	61.9	25.4	0.8	6	70
09/24/2008	<10	Acceptable	70.1	24.5	5.1	8	83
08/19/2008	<10	Acceptable	75.7	16.1	1.2	17	64
07/14/2008	5635	Unacceptable	74.1	21	1.4	11	65
07/02/2008	10	Acceptable	72.9	18.7	1.8	12	69
06/24/2008	160	Unacceptable	69.4	22.5	1	9	64
05/19/2008	10	Acceptable	58.4	10	1.1	63	87
09/06/2007	4	Acceptable	73.6	24.9	1.4	10	59
08/16/2007	19	Acceptable	77.2	19.1	1.4	23	59
07/11/2007	11	Acceptable	70.5	24.8	1.1	21	57
06/18/2007	16	Acceptable	n/a	n/a	n/a	n/a	n/a
05/23/2007	3	Acceptable	60.1	20.8	1.2	15	75
04/18/2007	356	Unacceptable	*	*	*	*	*
11/10/2006	310	Unacceptable	*	*	*	*	*
10/18/2006	263	Unacceptable	*	*	*	*	*
09/26/2006	25	Acceptable	*	*	*	*	*

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

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

Harlem River – Willis Ave. Bridge

About this location:

Agencies Responsible:

Basic Sampling Data

Water Quality, Enterococcus Count and Precipitation

Enterococcus Count

Basic Sampling Data

Enterococcus Count

Legend

What do the Numbers Mean?

More Information: