Blauvelt- Marsico Court

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
10/27/20182851Beach Advisory0.
09/15/201897Beach Advisory0.
08/18/20187701Beach Advisory0.
07/21/2018496Beach Advisory0.
06/16/2018980Beach Advisory0.
05/19/2018>2420Beach Advisory0.
09/16/2017305Beach Advisory0.
08/19/20172282Beach Advisory0.
07/15/20171374Beach Advisory0.
06/17/2017213Beach Advisory0.
05/20/201796Beach Advisory0.
10/08/2016613Beach Advisory0.
09/10/20162420Beach Advisory0.
08/13/2016866Beach Advisory0.
07/09/20161986Beach Advisory0.
06/11/20161986Beach Advisory0.
05/14/2016328Beach Advisory0.
10/03/2015>2420Beach Advisory0.
09/05/2015687Beach Advisory0.
08/01/2015326Beach Advisory0.
07/04/2015435Beach Advisory0.
06/06/2015>2420Beach Advisory0.
10/04/2014>2420Beach Advisory0.
09/06/20141414Beach Advisory0.
08/02/20141986Beach Advisory0.
07/05/20141414Beach Advisory0.
06/07/2014107Beach Advisory0.
10/12/20131046Beach Advisory0.
09/14/20131300Beach Advisory0.
08/10/20131986Beach Advisory0.
07/13/20131203Beach Advisory0.
06/15/2013866Beach Advisory0.
05/04/2013173Beach Advisory0.
10/06/20121414Beach Advisory0.
09/08/2012649Beach Advisory0.
08/04/2012649Beach Advisory0.
07/14/2012921Beach Advisory0.
06/02/2012>2420Beach Advisory0.
09/03/2011155Beach Advisory0.
05/28/201172Beach 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 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 in the Sparkill?s headwaters drains the north side of Clausland Mountain. The sampling point is located downstream of a small residential development located between Blauvelt State Park and Tackamack Town Park. The area around the residential development is buffered by forest.

Agencies Responsible:

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

Keep the Hudson River flowing!
Become a Member