Tappan- State Line

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

34 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 1414 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/10/2016 >2420 Beach Advisory 0.0 0.2 0.0 0.0 0.3
08/13/2016 >2420 Beach Advisory 0.0 0.6 0.1 0.1 0.8
07/09/2016 >2420 Beach Advisory 0.0 0.0 0.4 0.0 0.4
06/11/2016 1553 Beach Advisory 0.0 0.0 0.0 0.3 0.3
05/14/2016 980 Beach Advisory 0.0 0.2 0.0 0.0 0.2
05/14/2016 980 Beach Advisory 0.0 0.2 0.0 0.0 0.2
10/03/2015 >2420 Beach Advisory 0.2 0.2 0.1 1.2 1.8
09/05/2015 130 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/01/2015 387 Beach Advisory 0.0 0.0 1.5 0.0 1.5
07/04/2015 >2420 Beach Advisory 0.0 0.0 0.0 1.1 1.1
06/06/2015 >2420 Beach Advisory 0.4 0.0 0.0 0.0 0.4
05/02/2015 26 Acceptable 0.0 0.0 0.0 0.0 0.0
10/04/2014 >2420 Beach Advisory 0.2 0.0 0.0 0.0 0.2
09/06/2014 387 Beach Advisory 0.9 0.0 0.0 0.0 0.9
08/02/2014 >2420 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/05/2014 2420 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/07/2014 1986 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/03/2014 153 Beach Advisory 0.0 0.0 0.4 3.0 3.4
10/12/2013 361 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/14/2013 >2420 Beach Advisory 0.0 2.1 2.0 0.0 4.2
08/10/2013 1986 Beach Advisory 0.1 0.6 0.3 0.0 0.9
07/13/2013 2420 Beach Advisory 0.3 0.1 0.1 0.1 0.6
06/15/2013 1553 Beach Advisory 0.0 0.6 0.6 0.1 1.3
05/04/2013 49 Acceptable 0.0 0.0 0.0 0.0 0.0
10/06/2012 2420 Beach Advisory 0.0 0.0 1.0 0.4 1.4
09/08/2012 1986 Beach Advisory 1.0 0.0 0.1 0.4 1.5
08/04/2012 1120 Beach Advisory 0.0 0.0 0.0 0.1 0.1
07/14/2012 1046 Beach Advisory 0.1 0.0 0.0 0.0 0.1
06/02/2012 >2420 Beach Advisory 0.7 0.0 0.0 0.0 0.7
05/12/2012 365 Beach Advisory 0.0 0.4 0.3 0.2 0.9
11/06/2011 112 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/03/2011 178 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/28/2011 387 Beach Advisory 0.0 0.0 0.0 0.0 0.0

Entero Count (fecal indicator) and Rainfall Correlation

34 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

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