Elmsford- Above Mine Brook

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

49 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.

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
10/10/2019 3873 Beach Advisory 0.0 0.4 0.1 0.4 0.9
09/12/2019 10462 Beach Advisory 0.1 0.0 0.0 0.0 0.2
08/15/2019 2603 Beach Advisory 0.0 0.3 0.1 0.0 0.4
08/01/2019 7701 Beach Advisory 0.0 1.1 0.0 0.0 1.2
07/02/2019 241 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/20/2019 556 Beach Advisory 0.2 0.0 0.8 0.0 1.0
06/06/2019 197 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/23/2019 1137 Beach Advisory 0.1 0.0 0.0 0.2 0.3
10/18/2018 292 Beach Advisory 0.0 0.0 0.0 0.1 0.1
10/04/2018 2723 Beach Advisory 0.0 0.0 2.1 0.0 2.1
09/20/2018 776 Beach Advisory 0.0 0.0 0.9 0.0 0.9
09/06/2018 1112 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/23/2018 1968 Beach Advisory 0.0 0.9 0.0 0.0 0.9
08/09/2018 3130 Beach Advisory 0.4 0.0 0.4 0.0 0.8
07/26/2018 2064 Beach Advisory 0.0 1.1 0.0 0.7 1.9
07/12/2018 620 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/28/2018 >24196 Beach Advisory 1.1 0.0 0.0 0.0 1.1
06/14/2018 1396 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/31/2018 537 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/26/2017 195 Beach Advisory 0.0 0.0 0.4 0.0 0.4
10/12/2017 1576 Beach Advisory 0.1 0.0 0.0 0.3 0.4
09/28/2017 171 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/14/2017 51 Acceptable 0.0 0.0 0.0 0.0 0.0
08/31/2017 160 Beach Advisory 0.0 0.0 0.1 0.0 0.1
08/03/2017 24196 Beach Advisory 0.0 0.3 0.0 0.0 0.3
07/20/2017 341 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/06/2017 650 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/22/2017 171 Beach Advisory 0.0 0.0 0.0 0.4 0.5
06/08/2017 173 Beach Advisory 0.0 0.0 0.4 0.0 0.4
05/25/2017 1010 Beach Advisory 0.1 0.0 0.0 0.5 0.7
05/11/2017 20 Acceptable 0.0 0.0 0.0 0.0 0.0
10/27/2016 30 Acceptable 0.0 0.0 0.0 0.1 0.2
10/13/2016 100 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/29/2016 220 Beach Advisory 0.0 0.0 0.5 0.0 0.5
09/15/2016 390 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/01/2016 1410 Beach Advisory 0.1 0.0 0.0 0.0 0.1
08/18/2016 1530 Beach Advisory 0.1 0.1 0.3 0.0 0.5
08/04/2016 310 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/14/2016 1470 Beach Advisory 0.1 0.0 0.0 0.0 0.1
06/30/2016 530 Beach Advisory 0.0 0.0 0.6 0.4 1.1
06/16/2016 680 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/02/2016 220 Beach Advisory 0.0 0.0 0.0 0.7 0.7
05/19/2016 50 Acceptable 0.0 0.0 0.0 0.0 0.0
10/08/2015 203 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/24/2015 328 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/10/2015 9208 Beach Advisory 0.3 0.0 0.0 0.0 0.3
08/27/2015 569 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/13/2015 759 Beach Advisory 0.0 0.1 1.1 0.0 1.2
07/16/2015 581 Beach Advisory 0.0 0.0 1.1 0.0 1.1

Entero Count (fecal indicator) and Rainfall Correlation

49 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 and processed at laboratories that aren't directly affiliated with Riverkeeper, using methods and study designs that are consistent with Riverkeeper's Hudson River and Citizen Testing programs.

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:

In this area, the Saw Mill River runs through an office park, although it is buffered by a narrow corridor of vegetation. This site was tested by Groundworks Hudson Valley's 2008-2012 study.

Agencies Responsible:

Westchester County Dept. of Health: 914-813-5000; NYSDEC Region 3: 914-428-2505

Keep the Hudson River flowing!
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