Water Quality
Water Quality > Tributary and Waterfront Data > Sparkill Creek > Blauvelt- Marsico Court

Blauvelt- Marsico Court

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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

60 Samples taken

Sample Date [i] Enterococcus Count
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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
10/25/2022 51 Acceptable 0.0 0.4 0.0 0.0 0.4
09/29/2022 10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/24/2022 292 Beach Advisory 0.0 0.0 0.6 0.0 0.6
07/19/2022 2809 Beach Advisory 0.0 2.3 0.0 0.1 2.4
06/21/2022 30 Acceptable 0.0 0.0 0.0 0.0 0.0
05/17/2022 86 Beach Advisory 0.0 0.1 0.1 0.1 0.3
10/18/2021 134 Beach Advisory 0.0 0.0 0.4 0.0 0.4
09/27/2021 31 Acceptable 0.0 0.0 0.0 0.8 0.8
08/24/2021 74 Beach Advisory 0.0 0.0 0.0 0.0 0.1
07/27/2021 185 Beach Advisory 0.0 0.0 0.7 0.0 0.7
06/29/2021 908 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/25/2021 199 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/27/2020 475 Beach Advisory 0.0 0.1 0.0 0.0 0.1
08/25/2020 1670 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/28/2020 250 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/26/2019 96 Beach Advisory 0.0 0.0 0.0 0.1 0.1
08/17/2019 552 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/20/2019 1095 Beach Advisory 0.0 0.0 0.5 0.7 1.2
06/15/2019 132 Beach Advisory 0.0 0.0 0.7 0.0 0.7
05/18/2019 10 Acceptable 0.0 0.0 0.0 0.0 0.1
10/27/2018 2851 Beach Advisory 0.5 0.0 0.0 0.0 0.5
09/15/2018 97 Beach Advisory 0.0 0.0 0.0 0.2 0.2
08/18/2018 7701 Beach Advisory 0.2 0.6 0.0 0.0 0.8
07/21/2018 496 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/16/2018 980 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/21/2017 52 Acceptable 0.0 0.0 0.0 0.0 0.0
09/16/2017 305 Beach Advisory 0.0 0.0 0.1 0.0 0.1
08/19/2017 2282 Beach Advisory 0.0 0.5 0.0 0.0 0.5
07/15/2017 1374 Beach Advisory 0.0 0.7 0.1 0.0 0.8
06/17/2017 213 Beach Advisory 0.0 0.2 0.0 0.0 0.2
05/20/2017 96 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/08/2016 613 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/10/2016 2420 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/13/2016 866 Beach Advisory 0.0 0.6 0.1 0.1 0.8
07/09/2016 1986 Beach Advisory 0.0 0.0 0.4 0.0 0.4
06/11/2016 1986 Beach Advisory 0.0 0.0 0.0 0.2 0.2
05/14/2016 328 Beach Advisory 0.0 0.2 0.0 0.0 0.2
09/05/2015 687 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/01/2015 326 Beach Advisory 0.0 0.0 1.5 0.0 1.5
07/04/2015 435 Beach Advisory 0.0 0.0 0.0 1.1 1.1
05/02/2015 32 Acceptable 0.0 0.0 0.0 0.0 0.0
09/06/2014 1414 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/02/2014 1986 Beach Advisory 0.1 0.2 0.0 0.0 0.3
07/05/2014 1414 Beach Advisory 0.0 0.2 3.0 2.3 5.5
06/07/2014 107 Beach Advisory 0.0 0.0 0.5 0.0 0.5
05/03/2014 35 Acceptable 0.0 0.0 0.3 2.8 3.0
10/12/2013 1046 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/14/2013 1300 Beach Advisory 0.0 0.1 0.0 0.0 0.1
08/10/2013 1986 Beach Advisory 0.0 0.5 0.4 0.0 0.9
07/13/2013 1203 Beach Advisory 0.2 0.2 0.0 0.1 0.5
06/15/2013 866 Beach Advisory 0.0 0.4 1.1 0.0 1.4
05/04/2013 173 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/06/2012 1414 Beach Advisory 0.0 0.0 1.7 0.5 2.2
09/08/2012 649 Beach Advisory 0.7 0.0 0.0 0.5 1.2
08/04/2012 649 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/14/2012 921 Beach Advisory 0.1 0.0 0.0 0.0 0.1
05/12/2012 30 Acceptable 0.0 0.0 0.3 0.4 0.7
11/06/2011 34 Acceptable 0.0 0.0 0.0 0.0 0.0
09/03/2011 155 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/28/2011 72 Beach Advisory 0.0 0.0 0.0 0.0 0.0

Entero Count (fecal indicator) and Rainfall Correlation

60 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 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

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