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

45 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.

QualityRain, day of (in)Prior Day2 Days Prior3 Days Prior Rain4 Days Total Rain
10/27/20189208Beach Advisory0.
09/15/2018199Beach Advisory0.
08/18/2018>24196Beach Advisory0.
07/21/2018480Beach Advisory0.
06/16/20181733Beach Advisory0.
05/19/2018>2420Beach Advisory0.
10/21/2017933Beach Advisory0.
09/16/2017435Beach Advisory0.
08/19/20173448Beach Advisory0.
07/15/20173873Beach Advisory0.
06/17/20174611Beach Advisory0.
05/20/20171201Beach Advisory0.
10/08/20161414Beach Advisory0.
09/10/2016>2420Beach Advisory0.
08/13/2016>2420Beach Advisory0.
07/09/2016>2420Beach Advisory0.
06/11/20161553Beach Advisory0.
05/14/2016980Beach Advisory0.
10/03/2015>2420Beach Advisory0.
09/05/2015130Beach Advisory0.
08/01/2015387Beach Advisory0.
07/04/2015>2420Beach Advisory0.
06/06/2015>2420Beach Advisory0.
10/04/2014>2420Beach Advisory0.
09/06/2014387Beach Advisory0.
08/02/2014>2420Beach Advisory0.
07/05/20142420Beach Advisory0.
06/07/20141986Beach Advisory0.
05/03/2014153Beach Advisory0.
10/12/2013361Beach Advisory0.
09/14/2013>2420Beach Advisory0.
08/10/20131986Beach Advisory0.
07/13/20132420Beach Advisory0.
06/15/20131553Beach Advisory0.
10/06/20122420Beach Advisory0.
09/08/20121986Beach Advisory1.
08/04/20121120Beach Advisory0.
07/14/20121046Beach Advisory0.
06/02/2012>2420Beach Advisory0.
05/12/2012365Beach Advisory0.
11/06/2011112Beach Advisory0.
09/03/2011178Beach Advisory0.
05/28/2011387Beach Advisory0.

Entero Count (fecal indicator) and Rainfall Correlation

45 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 in a commercial strip where Sparkill Creek parallels the New York-New Jersey state line. There is a wooded buffer that forms a narrow strip on the New Jersey side of the Creek, but is considerably wider on the New York side.

Agencies Responsible:

Rockland County Dept. of Health: 845-364-2900; NYSDEC Region 3: 914-428-2505

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