Tappan- Route 303

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
10/27/20187215Beach Advisory0.
09/15/2018185Beach Advisory0.
08/18/2018>24196Beach Advisory0.
07/21/2018733Beach Advisory0.
06/16/20181300Beach Advisory0.
05/19/2018>2420Beach Advisory0.
10/21/2017216Beach Advisory0.
09/16/2017417Beach Advisory0.
08/19/201724196Beach Advisory0.
07/15/20174611Beach Advisory0.
06/17/20173076Beach Advisory0.
05/20/2017512Beach Advisory0.
10/08/2016770Beach Advisory0.
09/10/2016>2420Beach Advisory0.
08/13/20162420Beach Advisory0.
07/09/2016>2420Beach Advisory0.
06/11/20161986Beach Advisory0.
05/14/2016687Beach Advisory0.
10/03/2015>2420Beach Advisory0.
09/05/2015517Beach Advisory0.
08/01/2015411Beach Advisory0.
07/04/2015921Beach Advisory0.
06/06/2015>2420Beach Advisory0.
10/04/2014>2420Beach Advisory0.
09/06/2014866Beach Advisory0.
08/02/2014>2420Beach Advisory0.
07/05/20141553Beach Advisory0.
06/07/2014687Beach Advisory0.
05/03/2014120Beach Advisory0.
10/12/2013649Beach Advisory0.
09/14/2013>2420Beach Advisory0.
08/10/2013>2420Beach Advisory0.
07/13/2013>2420Beach Advisory0.
06/15/2013479Beach Advisory0.
10/06/2012>2420Beach Advisory0.
09/08/20121300Beach Advisory1.
08/04/20121120Beach Advisory0.
07/14/20121203Beach Advisory0.
06/02/2012>2420Beach Advisory0.
05/12/2012326Beach Advisory0.
11/06/2011192Beach Advisory0.
09/03/2011461Beach Advisory0.
05/28/2011411Beach 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 just downstream of Sparkill Creek?s crossing with the Palisades Interstate Parkway. Upstream of here, the creek flows through a relatively sparsely developed section, before entering back into residential land use here.

Agencies Responsible:

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

Keep the Hudson River flowing!
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