Water Quality > Tributary and Waterfront Data > Pocantico River > Briarcliff Manor- Below Pocantico Lake

Briarcliff Manor- Below Pocantico Lake

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

35 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
06/17/2017 344 Beach Advisory 0.0 0.2 0.0 0.0 0.2
05/20/2017 41 Acceptable 0.0 0.0 0.0 0.0 0.0
10/08/2016 49 Acceptable 0.0 0.0 0.0 0.0 0.0
09/10/2016 190 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/13/2016 1986 Beach Advisory 0.0 0.4 0.0 0.4 0.8
07/09/2016 132 Beach Advisory 0.0 0.0 0.4 0.0 0.4
06/11/2016 >2420 Beach Advisory 0.0 0.0 0.0 0.3 0.3
05/14/2016 81 Beach Advisory 0.0 0.2 0.0 0.0 0.2
10/03/2015 278 Beach Advisory 0.4 0.5 0.1 1.3 2.2
09/05/2015 44 Acceptable 0.0 0.0 0.0 0.0 0.0
08/01/2015 12 Acceptable 0.0 0.0 0.7 0.0 0.7
07/04/2015 23 Acceptable 0.0 0.0 0.0 0.6 0.6
06/06/2015 687 Beach Advisory 0.1 0.0 0.0 0.0 0.1
05/02/2015 12 Acceptable 0.0 0.0 0.0 0.0 0.0
10/04/2014 980 Beach Advisory 0.8 0.0 0.0 0.0 0.8
09/06/2014 172 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 1203 Beach Advisory 0.0 0.1 1.4 1.5 3.0
06/07/2014 17 Acceptable 0.0 0.0 0.5 0.2 0.6
05/03/2014 214 Beach Advisory 0.0 0.0 0.3 1.4 1.7
10/12/2013 113 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/14/2013 435 Beach Advisory 0.0 0.1 1.7 0.0 1.8
08/10/2013 921 Beach Advisory 0.0 0.3 0.1 0.0 0.4
07/13/2013 46 Acceptable 0.0 0.1 0.0 0.2 0.4
06/15/2013 1986 Beach Advisory 0.0 0.3 0.7 0.0 1.0
05/04/2013 2 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 1414 Beach Advisory 1.5 0.0 0.0 0.5 2.0
08/04/2012 980 Beach Advisory 0.0 0.0 0.0 0.1 0.1
07/14/2012 54 Acceptable 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 134 Beach Advisory 0.0 0.0 0.3 0.7 1.0
11/06/2011 117 Beach Advisory 0.0 0.0 0.0 0.0 0.0
11/04/2010 1414 Beach Advisory 1.1 0.0 0.0 0.0 1.1
06/12/2010 91 Beach Advisory 0.0 0.0 0.0 0.1 0.1

Entero Count (fecal indicator) and Rainfall Correlation

35 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 about 1/4 mile below Pocantico Lake, where the river enters the Rockefeller State Park Preserve. The southern end of Pocantico Lake is dammed.

Agencies Responsible:

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

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