Water Quality
Water Quality > Tributary and Waterfront Data > Sparkill Creek > Blauvelt- Blauvelt Arm tributary

Blauvelt- Blauvelt Arm tributary

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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

58 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
06/21/2022 226 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/17/2022 1274 Beach Advisory 0.0 0.1 0.1 0.1 0.3
10/18/2021 131 Beach Advisory 0.0 0.0 0.4 0.0 0.4
09/27/2021 74 Beach Advisory 0.0 0.0 0.0 0.8 0.8
08/24/2021 109 Beach Advisory 0.0 0.0 0.0 0.0 0.1
07/27/2021 537 Beach Advisory 0.0 0.0 0.7 0.0 0.7
06/29/2021 657 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/25/2021 573 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/27/2020 52 Acceptable 0.0 0.1 0.0 0.0 0.1
09/22/2020 404 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/25/2020 1081 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/28/2020 637 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/26/2019 86 Beach Advisory 0.0 0.0 0.0 0.1 0.1
09/28/2019 272 Beach Advisory 0.0 0.0 0.1 0.0 0.1
08/17/2019 213 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/20/2019 723 Beach Advisory 0.0 0.0 0.5 0.7 1.2
06/15/2019 206 Beach Advisory 0.0 0.0 0.7 0.0 0.7
05/18/2019 41 Acceptable 0.0 0.0 0.0 0.0 0.1
10/27/2018 14136 Beach Advisory 0.6 0.0 0.0 0.0 0.6
09/15/2018 171 Beach Advisory 0.0 0.0 0.0 0.1 0.1
08/18/2018 4884 Beach Advisory 0.2 0.6 0.0 0.0 0.8
07/21/2018 495 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/16/2018 2420 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/21/2017 1259 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/16/2017 663 Beach Advisory 0.0 0.0 0.1 0.0 0.1
08/19/2017 959 Beach Advisory 0.0 0.5 0.0 0.0 0.5
07/15/2017 1095 Beach Advisory 0.0 0.7 0.1 0.0 0.8
06/17/2017 1076 Beach Advisory 0.0 0.2 0.0 0.0 0.2
05/20/2017 145 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/08/2016 687 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/10/2016 921 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/13/2016 1733 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 2420 Beach Advisory 0.0 0.0 0.0 0.2 0.2
05/14/2016 980 Beach Advisory 0.0 0.2 0.0 0.0 0.2
09/05/2015 99 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/01/2015 1553 Beach Advisory 0.0 0.0 1.5 0.0 1.5
07/04/2015 308 Beach Advisory 0.0 0.0 0.0 1.1 1.1
05/02/2015 9 Acceptable 0.0 0.0 0.0 0.0 0.0
10/04/2014 816 Beach Advisory 0.5 0.0 0.0 0.0 0.5
09/06/2014 687 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/05/2014 727 Beach Advisory 0.0 0.2 3.0 2.3 5.5
06/07/2014 238 Beach Advisory 0.0 0.0 0.5 0.0 0.5
05/03/2014 107 Beach Advisory 0.0 0.0 0.3 2.8 3.0
10/12/2013 816 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/14/2013 248 Beach Advisory 0.0 0.1 0.0 0.0 0.1
08/10/2013 579 Beach Advisory 0.0 0.5 0.4 0.0 0.9
07/13/2013 1533 Beach Advisory 0.2 0.2 0.0 0.1 0.5
06/15/2013 479 Beach Advisory 0.0 0.2 0.7 0.0 0.9
05/04/2013 1733 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/06/2012 1986 Beach Advisory 0.0 0.0 1.7 0.5 2.2
09/08/2012 214 Beach Advisory 0.7 0.0 0.0 0.5 1.2
08/04/2012 687 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/14/2012 166 Beach Advisory 0.1 0.0 0.0 0.0 0.1
05/12/2012 96 Beach Advisory 0.0 0.0 0.3 0.4 0.7
11/06/2011 63 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/03/2011 96 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/28/2011 158 Beach Advisory 0.0 0.0 0.0 0.0 0.0

Entero Count (fecal indicator) and Rainfall Correlation

58 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:

The Blauvelt Arm enters Sparkill Creek after flowing through an area of commercial land use west of Route 303. This sampling site is located in a forested area between residences and an office building. This sampling site and the Clausland Arm sampling site are located side-by-side, although each waterway is sampled just upstream of their confluence.

Agencies Responsible:

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

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