Water Quality > Tributary and Waterfront Data > New York City Waterfront > Inwood- Harlem River, Muscota Marsh rowing dock

Inwood- Harlem River, Muscota Marsh rowing 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

57 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
09/29/2016 63 Beach Advisory 0.0 0.0 0.2 0.0 0.2
09/22/2016 10 Acceptable 0.0 0.0 0.0 0.7 0.7
09/08/2016 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/01/2016 63 Beach Advisory 0.5 0.0 0.0 0.0 0.5
08/18/2016 <10 Acceptable 0.0 0.0 0.1 0.0 0.2
08/11/2016 <10 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 10 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 52 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 106 Beach Advisory 0.0 0.0 0.1 0.5 0.6
06/23/2016 <10 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 561 Beach Advisory 0.0 0.5 0.0 0.9 1.4
06/02/2016 253 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 20 Acceptable 0.0 0.0 0.0 0.0 0.0
10/01/2015 52 Acceptable 0.1 1.3 0.1 0.0 1.5
09/24/2015 10 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 1616 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 110 Beach Advisory 0.0 0.0 0.3 0.0 0.3
08/13/2015 4107 Beach Advisory 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 <10 Acceptable 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 158 Beach Advisory 0.4 0.0 0.0 0.3 0.7
06/25/2015 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/18/2015 146 Beach Advisory 0.0 0.0 0.3 0.6 0.8
06/11/2015 41 Acceptable 0.0 0.0 0.0 0.1 0.1
06/04/2015 63 Beach Advisory 0.0 0.0 0.4 0.7 1.1
05/28/2015 216 Beach Advisory 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
09/25/2014 350 Beach Advisory 0.3 0.0 0.0 0.0 0.3
09/18/2014 41 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 41 Acceptable 0.0 0.0 0.0 0.0 0.0
08/28/2014 31 Acceptable 0.0 0.0 0.0 0.0 0.0
08/21/2014 <10 Acceptable 0.4 0.0 0.0 0.0 0.4
08/14/2014 41 Acceptable 0.0 0.5 0.2 0.0 0.7
08/07/2014 10 Acceptable 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 594 Beach Advisory 0.0 0.2 0.0 0.0 0.2
07/17/2014 120 Beach Advisory 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 31 Acceptable 1.0 0.0 0.0 0.0 1.0
06/26/2014 20 Acceptable 0.1 0.1 0.0 0.0 0.2
06/19/2014 86 Beach Advisory 0.2 0.0 0.0 0.0 0.2
06/12/2014 41 Acceptable 0.1 0.0 0.0 1.6 1.7
06/05/2014 6867 Beach Advisory 0.9 0.0 0.1 0.0 1.0
05/29/2014 31 Acceptable 0.0 0.0 0.0 0.0 0.0
05/22/2014 110 Beach Advisory 0.2 0.0 0.0 0.0 0.2

Entero Count (fecal indicator) and Rainfall Correlation

57 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:

This site is no longer actively sampled. Site Coordinator: Noelle Thurlow

Agencies Responsible:

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

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