West Harlem Piers Park kayak dock

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

86 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.

Quality Rain, day of (in) Prior Day 2 Days Prior 3 Days Prior Rain 4 Days Total Rain
Sort Sort Sort Sort Sort Sort Sort Sort
06/29/2017 10 Acceptable 0.0 0.0 0.2 0.0 0.2
06/22/2017 86 Beach Advisory 0.0 0.0 0.0 1.4 1.4
06/08/2017 <10 Acceptable 0.0 0.0 0.1 0.0 0.1
06/01/2017 <10 Acceptable 0.0 0.0 0.1 0.1 0.2
09/29/2016 20 Acceptable 0.0 0.0 0.2 0.0 0.2
09/15/2016 20 Acceptable 0.0 0.6 0.0 0.0 0.6
09/08/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/01/2016 20 Acceptable 0.5 0.0 0.0 0.0 0.5
08/25/2016 10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/18/2016 20 Acceptable 0.0 0.0 0.1 0.0 0.2
08/11/2016 30 Acceptable 0.2 0.1 0.0 0.0 0.2
08/04/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/28/2016 20 Acceptable 0.0 0.0 0.0 1.0 1.0
07/21/2016 10 Acceptable 0.0 0.0 0.0 0.4 0.4
07/14/2016 10 Acceptable 0.6 0.0 0.0 0.0 0.6
07/07/2016 10 Acceptable 0.0 0.0 0.7 0.5 1.2
06/30/2016 31 Acceptable 0.0 0.0 0.1 0.5 0.6
06/23/2016 20 Acceptable 0.0 0.0 0.0 0.0 0.0
06/16/2016 41 Acceptable 0.2 0.0 0.0 0.0 0.2
06/09/2016 75 Beach Advisory 0.0 0.5 0.0 0.9 1.4
06/02/2016 84 Beach Advisory 0.0 0.0 0.0 1.7 1.7
05/26/2016 10 Acceptable 0.0 0.0 0.2 0.0 0.2
05/19/2016 40 Acceptable 0.0 0.0 0.0 0.0 0.0
10/01/2015 108 Beach Advisory 0.1 1.3 0.1 0.0 1.5
09/24/2015 20 Acceptable 0.0 0.0 0.0 0.0 0.0
09/17/2015 10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/10/2015 1333 Beach Advisory 1.6 0.0 0.0 0.0 1.6
09/03/2015 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/27/2015 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/20/2015 <10 Acceptable 0.0 0.0 0.3 0.0 0.3
08/13/2015 <10 Acceptable 0.0 0.0 1.2 0.0 1.2
08/06/2015 10 Acceptable 0.0 0.0 0.4 0.0 0.4
07/30/2015 383 Beach Advisory 2.0 0.0 0.0 0.4 2.3
07/23/2015 10 Acceptable 0.0 0.3 0.0 0.0 0.3
07/16/2015 <10 Acceptable 0.0 0.1 0.4 0.0 0.5
07/09/2015 <10 Acceptable 0.3 0.0 0.1 0.0 0.4
07/01/2015 63 Beach Advisory 0.4 0.0 0.0 0.3 0.7
06/25/2015 20 Acceptable 0.0 0.0 0.0 0.0 0.0
06/18/2015 10 Acceptable 0.0 0.0 0.3 0.6 0.8
06/11/2015 10 Acceptable 0.0 0.0 0.0 0.1 0.1
06/04/2015 132 Beach Advisory 0.0 0.0 0.4 0.7 1.1
05/28/2015 <10 Acceptable 0.0 0.1 0.0 0.0 0.1
05/21/2015 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/18/2014 20 Acceptable 0.0 0.0 0.4 0.0 0.4
09/11/2014 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/04/2014 148 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/28/2014 10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/21/2014 256 Beach Advisory 0.4 0.0 0.0 0.0 0.4
08/14/2014 20 Acceptable 0.0 0.5 0.2 0.0 0.7
08/07/2014 135 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/31/2014 10 Acceptable 0.0 0.0 0.0 0.2 0.2
07/24/2014 256 Beach Advisory 0.0 0.2 0.0 0.0 0.2
07/17/2014 <10 Acceptable 0.0 0.0 1.3 0.5 1.8
07/10/2014 52 Acceptable 0.1 0.4 0.0 0.0 0.5
07/02/2014 10 Acceptable 1.0 0.0 0.0 0.0 1.0
06/26/2014 31 Acceptable 0.1 0.1 0.0 0.0 0.2
06/19/2014 313 Beach Advisory 0.2 0.0 0.0 0.0 0.2
06/12/2014 84 Beach Advisory 0.1 0.0 0.0 1.6 1.7
06/05/2014 5247 Beach Advisory 0.9 0.0 0.1 0.0 1.0
05/29/2014 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/03/2013 20 Acceptable 0.0 0.0 0.0 0.0 0.0
09/26/2013 657 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/19/2013 20 Acceptable 0.0 0.0 0.0 0.0 0.0
09/12/2013 98 Beach Advisory 1.6 0.0 0.0 0.0 1.6
09/05/2013 75 Beach Advisory 0.0 0.0 0.0 0.1 0.1
08/29/2013 301 Beach Advisory 0.0 0.4 0.0 0.0 0.5
08/22/2013 63 Beach Advisory 0.3 0.0 0.0 0.0 0.3
08/15/2013 173 Beach Advisory 0.0 0.0 0.9 0.1 0.9
08/08/2013 272 Beach Advisory 0.5 0.0 0.0 0.0 0.5
08/01/2013 644 Beach Advisory 0.7 0.0 0.0 0.0 0.7
07/25/2013 30 Acceptable 0.0 0.0 0.3 0.1 0.4
07/11/2013 52 Acceptable 0.0 0.0 0.2 0.2 0.5
07/02/2013 717 Beach Advisory 0.1 0.8 0.0 0.0 0.9
06/27/2013 20 Acceptable 0.2 0.1 0.0 0.0 0.3
06/20/2013 231 Beach Advisory 0.0 0.0 0.2 0.0 0.2
06/13/2013 84 Beach Advisory 1.3 0.0 0.1 1.4 2.7
06/06/2013 52 Acceptable 0.1 0.0 0.0 0.9 1.0
05/30/2013 384 Beach Advisory 0.0 0.0 0.5 0.0 0.5
05/23/2013 98 Beach Advisory 1.8 0.0 0.0 0.0 1.8
12/01/2011 12 Acceptable 0.0 0.0 0.5 0.0 0.5
11/21/2011 <1 Acceptable 0.1 0.0 0.0 0.0 0.1
11/17/2011 4 Acceptable 0.7 0.7 0.0 0.0 1.4
10/27/2011 25 Acceptable 0.6 0.0 0.0 0.0 0.6
12/31/1969 Acceptable 0.0 0.0 0.0 0.5 0.5
12/31/1969 Acceptable 0.0 0.0 0.0 0.0 0.0
12/31/1969 Acceptable 0.0 0.0 0.0 0.0 0.0

Entero Count (fecal indicator) and Rainfall Correlation

86 Samples taken

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 citizen scientists and processed at laboratories that aren't directly affiliated with Riverkeeper, using methods and study designs that are consistent with Riverkeeper's Hudson River and Citizen Testing programs.

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:

Site Coordinator: Robert Coover. These samples are processed at The River Project.

Agencies Responsible:

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

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