Water Quality > Citizen Testing Data > Pocantico River > Sleepy Hollow- Rockefeller Park

Sleepy Hollow- Rockefeller Park

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

33 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
10/08/2016 47 Acceptable 0.0 0.0 0.0 0.0 0.0
09/10/2016 173 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/13/2016 >2420 Beach Advisory 0.0 0.4 0.0 0.4 0.8
07/09/2016 613 Beach Advisory 0.0 0.0 0.4 0.0 0.4
06/11/2016 1300 Beach Advisory 0.0 0.0 0.0 0.3 0.3
05/14/2016 24 Acceptable 0.0 0.2 0.0 0.0 0.2
10/03/2015 >2420 Beach Advisory 0.4 0.5 0.1 1.3 2.2
09/05/2015 140 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/01/2015 135 Beach Advisory 0.0 0.0 0.7 0.0 0.7
07/04/2015 199 Beach Advisory 0.0 0.0 0.0 0.6 0.6
06/06/2015 613 Beach Advisory 0.1 0.0 0.0 0.0 0.1
05/02/2015 8 Acceptable 0.0 0.0 0.0 0.0 0.0
10/04/2014 >2420 Beach Advisory 0.8 0.0 0.0 0.0 0.8
09/06/2014 150 Beach Advisory 0.1 0.0 0.0 0.0 0.1
08/02/2014 >2420 Beach Advisory 0.2 0.2 0.0 0.0 0.4
07/05/2014 1553 Beach Advisory 0.0 0.1 1.4 1.5 3.0
06/07/2014 13 Acceptable 0.0 0.0 0.5 0.2 0.6
05/03/2014 162 Beach Advisory 0.0 0.0 0.3 1.4 1.7
10/12/2013 240 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/14/2013 2420 Beach Advisory 0.0 0.1 1.7 0.0 1.8
08/10/2013 1046 Beach Advisory 0.0 0.3 0.1 0.0 0.4
07/13/2013 299 Beach Advisory 0.0 0.1 0.0 0.2 0.4
06/15/2013 1120 Beach Advisory 0.0 0.3 0.7 0.0 1.0
05/04/2013 17 Acceptable 0.0 0.0 0.0 0.0 0.0
10/06/2012 >2420 Beach Advisory 0.0 0.0 1.2 0.3 1.5
09/08/2012 128 Beach Advisory 1.5 0.0 0.0 0.5 2.0
08/04/2012 195 Beach Advisory 0.0 0.0 0.0 0.1 0.1
07/14/2012 308 Beach Advisory 0.1 0.0 0.0 0.0 0.1
06/02/2012 >2420 Beach Advisory 0.9 0.0 0.0 0.0 1.0
05/12/2012 24 Acceptable 0.0 0.0 0.3 0.7 1.0
11/06/2011 54 Acceptable 0.0 0.0 0.0 0.0 0.0
11/04/2010 >2420 Beach Advisory 1.1 0.0 0.0 0.0 1.1
06/12/2010 121 Beach Advisory 0.0 0.0 0.0 0.1 0.1

Entero Count (fecal indicator) and Rainfall Correlation

33 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 trained by Riverkeeper, and processed on the Riverkeeper vessel, according to the 2014 Quality Assurance Project Plan.

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 located at the southern (downstream) edge of the Rockefeller State Park Preserve, which includes over 1,400 acres of forested park land and trails.

Agencies Responsible:

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

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